CVE-2022-49007 (GCVE-0-2022-49007)

Vulnerability from cvelistv5 – Published: 2024-10-21 20:06 – Updated: 2025-12-23 13:21
VLAI?
Title
nilfs2: fix NULL pointer dereference in nilfs_palloc_commit_free_entry()
Summary
In the Linux kernel, the following vulnerability has been resolved: nilfs2: fix NULL pointer dereference in nilfs_palloc_commit_free_entry() Syzbot reported a null-ptr-deref bug: NILFS (loop0): segctord starting. Construction interval = 5 seconds, CP frequency < 30 seconds general protection fault, probably for non-canonical address 0xdffffc0000000002: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017] CPU: 1 PID: 3603 Comm: segctord Not tainted 6.1.0-rc2-syzkaller-00105-gb229b6ca5abb #0 Hardware name: Google Compute Engine/Google Compute Engine, BIOS Google 10/11/2022 RIP: 0010:nilfs_palloc_commit_free_entry+0xe5/0x6b0 fs/nilfs2/alloc.c:608 Code: 00 00 00 00 fc ff df 80 3c 02 00 0f 85 cd 05 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8b 73 08 49 8d 7e 10 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 26 05 00 00 49 8b 46 10 be a6 00 00 00 48 c7 c7 RSP: 0018:ffffc90003dff830 EFLAGS: 00010212 RAX: dffffc0000000000 RBX: ffff88802594e218 RCX: 000000000000000d RDX: 0000000000000002 RSI: 0000000000002000 RDI: 0000000000000010 RBP: ffff888071880222 R08: 0000000000000005 R09: 000000000000003f R10: 000000000000000d R11: 0000000000000000 R12: ffff888071880158 R13: ffff88802594e220 R14: 0000000000000000 R15: 0000000000000004 FS: 0000000000000000(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb1c08316a8 CR3: 0000000018560000 CR4: 0000000000350ee0 Call Trace: <TASK> nilfs_dat_commit_free fs/nilfs2/dat.c:114 [inline] nilfs_dat_commit_end+0x464/0x5f0 fs/nilfs2/dat.c:193 nilfs_dat_commit_update+0x26/0x40 fs/nilfs2/dat.c:236 nilfs_btree_commit_update_v+0x87/0x4a0 fs/nilfs2/btree.c:1940 nilfs_btree_commit_propagate_v fs/nilfs2/btree.c:2016 [inline] nilfs_btree_propagate_v fs/nilfs2/btree.c:2046 [inline] nilfs_btree_propagate+0xa00/0xd60 fs/nilfs2/btree.c:2088 nilfs_bmap_propagate+0x73/0x170 fs/nilfs2/bmap.c:337 nilfs_collect_file_data+0x45/0xd0 fs/nilfs2/segment.c:568 nilfs_segctor_apply_buffers+0x14a/0x470 fs/nilfs2/segment.c:1018 nilfs_segctor_scan_file+0x3f4/0x6f0 fs/nilfs2/segment.c:1067 nilfs_segctor_collect_blocks fs/nilfs2/segment.c:1197 [inline] nilfs_segctor_collect fs/nilfs2/segment.c:1503 [inline] nilfs_segctor_do_construct+0x12fc/0x6af0 fs/nilfs2/segment.c:2045 nilfs_segctor_construct+0x8e3/0xb30 fs/nilfs2/segment.c:2379 nilfs_segctor_thread_construct fs/nilfs2/segment.c:2487 [inline] nilfs_segctor_thread+0x3c3/0xf30 fs/nilfs2/segment.c:2570 kthread+0x2e4/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306 </TASK> ... If DAT metadata file is corrupted on disk, there is a case where req->pr_desc_bh is NULL and blocknr is 0 at nilfs_dat_commit_end() during a b-tree operation that cascadingly updates ancestor nodes of the b-tree, because nilfs_dat_commit_alloc() for a lower level block can initialize the blocknr on the same DAT entry between nilfs_dat_prepare_end() and nilfs_dat_commit_end(). If this happens, nilfs_dat_commit_end() calls nilfs_dat_commit_free() without valid buffer heads in req->pr_desc_bh and req->pr_bitmap_bh, and causes the NULL pointer dereference above in nilfs_palloc_commit_free_entry() function, which leads to a crash. Fix this by adding a NULL check on req->pr_desc_bh and req->pr_bitmap_bh before nilfs_palloc_commit_free_entry() in nilfs_dat_commit_free(). This also calls nilfs_error() in that case to notify that there is a fatal flaw in the filesystem metadata and prevent further operations.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: a17564f58b11476c011d623fa1f268602a81c27c , < 2f2c59506ae39496588ceb8b88bdbdbaed895d63 (git)
Affected: a17564f58b11476c011d623fa1f268602a81c27c , < 165c7a3b27a3857ebf57f626b9f38b48b6792e68 (git)
Affected: a17564f58b11476c011d623fa1f268602a81c27c , < bc3fd3293887b4cf84a9109700faeb82de533c89 (git)
Affected: a17564f58b11476c011d623fa1f268602a81c27c , < 9a130b72e6bd1fb07fc3cde839dc6fb53da76f07 (git)
Affected: a17564f58b11476c011d623fa1f268602a81c27c , < e858917ab785afe83c14f5ac141301216ccda847 (git)
Affected: a17564f58b11476c011d623fa1f268602a81c27c , < 33021419fd81efd3d729a7f19341ba4b98fe66ce (git)
Affected: a17564f58b11476c011d623fa1f268602a81c27c , < 381b84f60e549ea98cec4666c6c728b1b3318756 (git)
Affected: a17564f58b11476c011d623fa1f268602a81c27c , < f0a0ccda18d6fd826d7c7e7ad48a6ed61c20f8b4 (git)
Create a notification for this product.
    Linux Linux Affected: 2.6.30
Unaffected: 0 , < 2.6.30 (semver)
Unaffected: 4.9.335 , ≤ 4.9.* (semver)
Unaffected: 4.14.301 , ≤ 4.14.* (semver)
Unaffected: 4.19.268 , ≤ 4.19.* (semver)
Unaffected: 5.4.226 , ≤ 5.4.* (semver)
Unaffected: 5.10.158 , ≤ 5.10.* (semver)
Unaffected: 5.15.82 , ≤ 5.15.* (semver)
Unaffected: 6.0.12 , ≤ 6.0.* (semver)
Unaffected: 6.1 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2022-49007",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-10-22T13:14:21.732997Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-10-22T13:18:39.586Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/nilfs2/dat.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "2f2c59506ae39496588ceb8b88bdbdbaed895d63",
              "status": "affected",
              "version": "a17564f58b11476c011d623fa1f268602a81c27c",
              "versionType": "git"
            },
            {
              "lessThan": "165c7a3b27a3857ebf57f626b9f38b48b6792e68",
              "status": "affected",
              "version": "a17564f58b11476c011d623fa1f268602a81c27c",
              "versionType": "git"
            },
            {
              "lessThan": "bc3fd3293887b4cf84a9109700faeb82de533c89",
              "status": "affected",
              "version": "a17564f58b11476c011d623fa1f268602a81c27c",
              "versionType": "git"
            },
            {
              "lessThan": "9a130b72e6bd1fb07fc3cde839dc6fb53da76f07",
              "status": "affected",
              "version": "a17564f58b11476c011d623fa1f268602a81c27c",
              "versionType": "git"
            },
            {
              "lessThan": "e858917ab785afe83c14f5ac141301216ccda847",
              "status": "affected",
              "version": "a17564f58b11476c011d623fa1f268602a81c27c",
              "versionType": "git"
            },
            {
              "lessThan": "33021419fd81efd3d729a7f19341ba4b98fe66ce",
              "status": "affected",
              "version": "a17564f58b11476c011d623fa1f268602a81c27c",
              "versionType": "git"
            },
            {
              "lessThan": "381b84f60e549ea98cec4666c6c728b1b3318756",
              "status": "affected",
              "version": "a17564f58b11476c011d623fa1f268602a81c27c",
              "versionType": "git"
            },
            {
              "lessThan": "f0a0ccda18d6fd826d7c7e7ad48a6ed61c20f8b4",
              "status": "affected",
              "version": "a17564f58b11476c011d623fa1f268602a81c27c",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/nilfs2/dat.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.30"
            },
            {
              "lessThan": "2.6.30",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.9.*",
              "status": "unaffected",
              "version": "4.9.335",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.14.*",
              "status": "unaffected",
              "version": "4.14.301",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.19.*",
              "status": "unaffected",
              "version": "4.19.268",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.226",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.158",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.82",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.0.*",
              "status": "unaffected",
              "version": "6.0.12",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.9.335",
                  "versionStartIncluding": "2.6.30",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.14.301",
                  "versionStartIncluding": "2.6.30",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.19.268",
                  "versionStartIncluding": "2.6.30",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.226",
                  "versionStartIncluding": "2.6.30",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.158",
                  "versionStartIncluding": "2.6.30",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.82",
                  "versionStartIncluding": "2.6.30",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.0.12",
                  "versionStartIncluding": "2.6.30",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1",
                  "versionStartIncluding": "2.6.30",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnilfs2: fix NULL pointer dereference in nilfs_palloc_commit_free_entry()\n\nSyzbot reported a null-ptr-deref bug:\n\n NILFS (loop0): segctord starting. Construction interval = 5 seconds, CP\n frequency \u003c 30 seconds\n general protection fault, probably for non-canonical address\n 0xdffffc0000000002: 0000 [#1] PREEMPT SMP KASAN\n KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017]\n CPU: 1 PID: 3603 Comm: segctord Not tainted\n 6.1.0-rc2-syzkaller-00105-gb229b6ca5abb #0\n Hardware name: Google Compute Engine/Google Compute Engine, BIOS Google\n 10/11/2022\n RIP: 0010:nilfs_palloc_commit_free_entry+0xe5/0x6b0\n fs/nilfs2/alloc.c:608\n Code: 00 00 00 00 fc ff df 80 3c 02 00 0f 85 cd 05 00 00 48 b8 00 00 00\n 00 00 fc ff df 4c 8b 73 08 49 8d 7e 10 48 89 fa 48 c1 ea 03 \u003c80\u003e 3c 02\n 00 0f 85 26 05 00 00 49 8b 46 10 be a6 00 00 00 48 c7 c7\n RSP: 0018:ffffc90003dff830 EFLAGS: 00010212\n RAX: dffffc0000000000 RBX: ffff88802594e218 RCX: 000000000000000d\n RDX: 0000000000000002 RSI: 0000000000002000 RDI: 0000000000000010\n RBP: ffff888071880222 R08: 0000000000000005 R09: 000000000000003f\n R10: 000000000000000d R11: 0000000000000000 R12: ffff888071880158\n R13: ffff88802594e220 R14: 0000000000000000 R15: 0000000000000004\n FS:  0000000000000000(0000) GS:ffff8880b9b00000(0000)\n knlGS:0000000000000000\n CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n CR2: 00007fb1c08316a8 CR3: 0000000018560000 CR4: 0000000000350ee0\n Call Trace:\n  \u003cTASK\u003e\n  nilfs_dat_commit_free fs/nilfs2/dat.c:114 [inline]\n  nilfs_dat_commit_end+0x464/0x5f0 fs/nilfs2/dat.c:193\n  nilfs_dat_commit_update+0x26/0x40 fs/nilfs2/dat.c:236\n  nilfs_btree_commit_update_v+0x87/0x4a0 fs/nilfs2/btree.c:1940\n  nilfs_btree_commit_propagate_v fs/nilfs2/btree.c:2016 [inline]\n  nilfs_btree_propagate_v fs/nilfs2/btree.c:2046 [inline]\n  nilfs_btree_propagate+0xa00/0xd60 fs/nilfs2/btree.c:2088\n  nilfs_bmap_propagate+0x73/0x170 fs/nilfs2/bmap.c:337\n  nilfs_collect_file_data+0x45/0xd0 fs/nilfs2/segment.c:568\n  nilfs_segctor_apply_buffers+0x14a/0x470 fs/nilfs2/segment.c:1018\n  nilfs_segctor_scan_file+0x3f4/0x6f0 fs/nilfs2/segment.c:1067\n  nilfs_segctor_collect_blocks fs/nilfs2/segment.c:1197 [inline]\n  nilfs_segctor_collect fs/nilfs2/segment.c:1503 [inline]\n  nilfs_segctor_do_construct+0x12fc/0x6af0 fs/nilfs2/segment.c:2045\n  nilfs_segctor_construct+0x8e3/0xb30 fs/nilfs2/segment.c:2379\n  nilfs_segctor_thread_construct fs/nilfs2/segment.c:2487 [inline]\n  nilfs_segctor_thread+0x3c3/0xf30 fs/nilfs2/segment.c:2570\n  kthread+0x2e4/0x3a0 kernel/kthread.c:376\n  ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306\n  \u003c/TASK\u003e\n ...\n\nIf DAT metadata file is corrupted on disk, there is a case where\nreq-\u003epr_desc_bh is NULL and blocknr is 0 at nilfs_dat_commit_end() during\na b-tree operation that cascadingly updates ancestor nodes of the b-tree,\nbecause nilfs_dat_commit_alloc() for a lower level block can initialize\nthe blocknr on the same DAT entry between nilfs_dat_prepare_end() and\nnilfs_dat_commit_end().\n\nIf this happens, nilfs_dat_commit_end() calls nilfs_dat_commit_free()\nwithout valid buffer heads in req-\u003epr_desc_bh and req-\u003epr_bitmap_bh, and\ncauses the NULL pointer dereference above in\nnilfs_palloc_commit_free_entry() function, which leads to a crash.\n\nFix this by adding a NULL check on req-\u003epr_desc_bh and req-\u003epr_bitmap_bh\nbefore nilfs_palloc_commit_free_entry() in nilfs_dat_commit_free().\n\nThis also calls nilfs_error() in that case to notify that there is a fatal\nflaw in the filesystem metadata and prevent further operations."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-12-23T13:21:27.209Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/2f2c59506ae39496588ceb8b88bdbdbaed895d63"
        },
        {
          "url": "https://git.kernel.org/stable/c/165c7a3b27a3857ebf57f626b9f38b48b6792e68"
        },
        {
          "url": "https://git.kernel.org/stable/c/bc3fd3293887b4cf84a9109700faeb82de533c89"
        },
        {
          "url": "https://git.kernel.org/stable/c/9a130b72e6bd1fb07fc3cde839dc6fb53da76f07"
        },
        {
          "url": "https://git.kernel.org/stable/c/e858917ab785afe83c14f5ac141301216ccda847"
        },
        {
          "url": "https://git.kernel.org/stable/c/33021419fd81efd3d729a7f19341ba4b98fe66ce"
        },
        {
          "url": "https://git.kernel.org/stable/c/381b84f60e549ea98cec4666c6c728b1b3318756"
        },
        {
          "url": "https://git.kernel.org/stable/c/f0a0ccda18d6fd826d7c7e7ad48a6ed61c20f8b4"
        }
      ],
      "title": "nilfs2: fix NULL pointer dereference in nilfs_palloc_commit_free_entry()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-49007",
    "datePublished": "2024-10-21T20:06:19.506Z",
    "dateReserved": "2024-08-22T01:27:53.643Z",
    "dateUpdated": "2025-12-23T13:21:27.209Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2022-49007\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-10-22T13:14:21.732997Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-10-22T13:14:25.282Z\"}}], \"cna\": {\"title\": \"nilfs2: fix NULL pointer dereference in nilfs_palloc_commit_free_entry()\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"a17564f58b11476c011d623fa1f268602a81c27c\", \"lessThan\": \"2f2c59506ae39496588ceb8b88bdbdbaed895d63\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"a17564f58b11476c011d623fa1f268602a81c27c\", \"lessThan\": \"165c7a3b27a3857ebf57f626b9f38b48b6792e68\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"a17564f58b11476c011d623fa1f268602a81c27c\", \"lessThan\": \"bc3fd3293887b4cf84a9109700faeb82de533c89\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"a17564f58b11476c011d623fa1f268602a81c27c\", \"lessThan\": \"9a130b72e6bd1fb07fc3cde839dc6fb53da76f07\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"a17564f58b11476c011d623fa1f268602a81c27c\", \"lessThan\": \"e858917ab785afe83c14f5ac141301216ccda847\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"a17564f58b11476c011d623fa1f268602a81c27c\", \"lessThan\": \"33021419fd81efd3d729a7f19341ba4b98fe66ce\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"a17564f58b11476c011d623fa1f268602a81c27c\", \"lessThan\": \"381b84f60e549ea98cec4666c6c728b1b3318756\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"a17564f58b11476c011d623fa1f268602a81c27c\", \"lessThan\": \"f0a0ccda18d6fd826d7c7e7ad48a6ed61c20f8b4\", \"versionType\": \"git\"}], \"programFiles\": [\"fs/nilfs2/dat.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"2.6.30\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"2.6.30\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"4.9.335\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.9.*\"}, {\"status\": \"unaffected\", \"version\": \"4.14.301\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.14.*\"}, {\"status\": \"unaffected\", \"version\": \"4.19.268\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.19.*\"}, {\"status\": \"unaffected\", \"version\": \"5.4.226\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.158\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.82\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.0.12\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.0.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"fs/nilfs2/dat.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/2f2c59506ae39496588ceb8b88bdbdbaed895d63\"}, {\"url\": \"https://git.kernel.org/stable/c/165c7a3b27a3857ebf57f626b9f38b48b6792e68\"}, {\"url\": \"https://git.kernel.org/stable/c/bc3fd3293887b4cf84a9109700faeb82de533c89\"}, {\"url\": \"https://git.kernel.org/stable/c/9a130b72e6bd1fb07fc3cde839dc6fb53da76f07\"}, {\"url\": \"https://git.kernel.org/stable/c/e858917ab785afe83c14f5ac141301216ccda847\"}, {\"url\": \"https://git.kernel.org/stable/c/33021419fd81efd3d729a7f19341ba4b98fe66ce\"}, {\"url\": \"https://git.kernel.org/stable/c/381b84f60e549ea98cec4666c6c728b1b3318756\"}, {\"url\": \"https://git.kernel.org/stable/c/f0a0ccda18d6fd826d7c7e7ad48a6ed61c20f8b4\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnilfs2: fix NULL pointer dereference in nilfs_palloc_commit_free_entry()\\n\\nSyzbot reported a null-ptr-deref bug:\\n\\n NILFS (loop0): segctord starting. Construction interval = 5 seconds, CP\\n frequency \u003c 30 seconds\\n general protection fault, probably for non-canonical address\\n 0xdffffc0000000002: 0000 [#1] PREEMPT SMP KASAN\\n KASAN: null-ptr-deref in range [0x0000000000000010-0x0000000000000017]\\n CPU: 1 PID: 3603 Comm: segctord Not tainted\\n 6.1.0-rc2-syzkaller-00105-gb229b6ca5abb #0\\n Hardware name: Google Compute Engine/Google Compute Engine, BIOS Google\\n 10/11/2022\\n RIP: 0010:nilfs_palloc_commit_free_entry+0xe5/0x6b0\\n fs/nilfs2/alloc.c:608\\n Code: 00 00 00 00 fc ff df 80 3c 02 00 0f 85 cd 05 00 00 48 b8 00 00 00\\n 00 00 fc ff df 4c 8b 73 08 49 8d 7e 10 48 89 fa 48 c1 ea 03 \u003c80\u003e 3c 02\\n 00 0f 85 26 05 00 00 49 8b 46 10 be a6 00 00 00 48 c7 c7\\n RSP: 0018:ffffc90003dff830 EFLAGS: 00010212\\n RAX: dffffc0000000000 RBX: ffff88802594e218 RCX: 000000000000000d\\n RDX: 0000000000000002 RSI: 0000000000002000 RDI: 0000000000000010\\n RBP: ffff888071880222 R08: 0000000000000005 R09: 000000000000003f\\n R10: 000000000000000d R11: 0000000000000000 R12: ffff888071880158\\n R13: ffff88802594e220 R14: 0000000000000000 R15: 0000000000000004\\n FS:  0000000000000000(0000) GS:ffff8880b9b00000(0000)\\n knlGS:0000000000000000\\n CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\\n CR2: 00007fb1c08316a8 CR3: 0000000018560000 CR4: 0000000000350ee0\\n Call Trace:\\n  \u003cTASK\u003e\\n  nilfs_dat_commit_free fs/nilfs2/dat.c:114 [inline]\\n  nilfs_dat_commit_end+0x464/0x5f0 fs/nilfs2/dat.c:193\\n  nilfs_dat_commit_update+0x26/0x40 fs/nilfs2/dat.c:236\\n  nilfs_btree_commit_update_v+0x87/0x4a0 fs/nilfs2/btree.c:1940\\n  nilfs_btree_commit_propagate_v fs/nilfs2/btree.c:2016 [inline]\\n  nilfs_btree_propagate_v fs/nilfs2/btree.c:2046 [inline]\\n  nilfs_btree_propagate+0xa00/0xd60 fs/nilfs2/btree.c:2088\\n  nilfs_bmap_propagate+0x73/0x170 fs/nilfs2/bmap.c:337\\n  nilfs_collect_file_data+0x45/0xd0 fs/nilfs2/segment.c:568\\n  nilfs_segctor_apply_buffers+0x14a/0x470 fs/nilfs2/segment.c:1018\\n  nilfs_segctor_scan_file+0x3f4/0x6f0 fs/nilfs2/segment.c:1067\\n  nilfs_segctor_collect_blocks fs/nilfs2/segment.c:1197 [inline]\\n  nilfs_segctor_collect fs/nilfs2/segment.c:1503 [inline]\\n  nilfs_segctor_do_construct+0x12fc/0x6af0 fs/nilfs2/segment.c:2045\\n  nilfs_segctor_construct+0x8e3/0xb30 fs/nilfs2/segment.c:2379\\n  nilfs_segctor_thread_construct fs/nilfs2/segment.c:2487 [inline]\\n  nilfs_segctor_thread+0x3c3/0xf30 fs/nilfs2/segment.c:2570\\n  kthread+0x2e4/0x3a0 kernel/kthread.c:376\\n  ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306\\n  \u003c/TASK\u003e\\n ...\\n\\nIf DAT metadata file is corrupted on disk, there is a case where\\nreq-\u003epr_desc_bh is NULL and blocknr is 0 at nilfs_dat_commit_end() during\\na b-tree operation that cascadingly updates ancestor nodes of the b-tree,\\nbecause nilfs_dat_commit_alloc() for a lower level block can initialize\\nthe blocknr on the same DAT entry between nilfs_dat_prepare_end() and\\nnilfs_dat_commit_end().\\n\\nIf this happens, nilfs_dat_commit_end() calls nilfs_dat_commit_free()\\nwithout valid buffer heads in req-\u003epr_desc_bh and req-\u003epr_bitmap_bh, and\\ncauses the NULL pointer dereference above in\\nnilfs_palloc_commit_free_entry() function, which leads to a crash.\\n\\nFix this by adding a NULL check on req-\u003epr_desc_bh and req-\u003epr_bitmap_bh\\nbefore nilfs_palloc_commit_free_entry() in nilfs_dat_commit_free().\\n\\nThis also calls nilfs_error() in that case to notify that there is a fatal\\nflaw in the filesystem metadata and prevent further operations.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.9.335\", \"versionStartIncluding\": \"2.6.30\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.14.301\", \"versionStartIncluding\": \"2.6.30\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.19.268\", \"versionStartIncluding\": \"2.6.30\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.226\", \"versionStartIncluding\": \"2.6.30\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.158\", \"versionStartIncluding\": \"2.6.30\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.82\", \"versionStartIncluding\": \"2.6.30\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.0.12\", \"versionStartIncluding\": \"2.6.30\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1\", \"versionStartIncluding\": \"2.6.30\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-12-23T13:21:27.209Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2022-49007\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-12-23T13:21:27.209Z\", \"dateReserved\": \"2024-08-22T01:27:53.643Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-10-21T20:06:19.506Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.