CVE-2023-52751 (GCVE-0-2023-52751)

Vulnerability from cvelistv5 – Published: 2024-05-21 15:30 – Updated: 2026-01-05 10:17
VLAI?
Title
smb: client: fix use-after-free in smb2_query_info_compound()
Summary
In the Linux kernel, the following vulnerability has been resolved: smb: client: fix use-after-free in smb2_query_info_compound() The following UAF was triggered when running fstests generic/072 with KASAN enabled against Windows Server 2022 and mount options 'multichannel,max_channels=2,vers=3.1.1,mfsymlinks,noperm' BUG: KASAN: slab-use-after-free in smb2_query_info_compound+0x423/0x6d0 [cifs] Read of size 8 at addr ffff888014941048 by task xfs_io/27534 CPU: 0 PID: 27534 Comm: xfs_io Not tainted 6.6.0-rc7 #1 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.16.2-3-gd478f380-rebuilt.opensuse.org 04/01/2014 Call Trace: dump_stack_lvl+0x4a/0x80 print_report+0xcf/0x650 ? srso_alias_return_thunk+0x5/0x7f ? srso_alias_return_thunk+0x5/0x7f ? __phys_addr+0x46/0x90 kasan_report+0xda/0x110 ? smb2_query_info_compound+0x423/0x6d0 [cifs] ? smb2_query_info_compound+0x423/0x6d0 [cifs] smb2_query_info_compound+0x423/0x6d0 [cifs] ? __pfx_smb2_query_info_compound+0x10/0x10 [cifs] ? srso_alias_return_thunk+0x5/0x7f ? __stack_depot_save+0x39/0x480 ? kasan_save_stack+0x33/0x60 ? kasan_set_track+0x25/0x30 ? ____kasan_slab_free+0x126/0x170 smb2_queryfs+0xc2/0x2c0 [cifs] ? __pfx_smb2_queryfs+0x10/0x10 [cifs] ? __pfx___lock_acquire+0x10/0x10 smb311_queryfs+0x210/0x220 [cifs] ? __pfx_smb311_queryfs+0x10/0x10 [cifs] ? srso_alias_return_thunk+0x5/0x7f ? __lock_acquire+0x480/0x26c0 ? lock_release+0x1ed/0x640 ? srso_alias_return_thunk+0x5/0x7f ? do_raw_spin_unlock+0x9b/0x100 cifs_statfs+0x18c/0x4b0 [cifs] statfs_by_dentry+0x9b/0xf0 fd_statfs+0x4e/0xb0 __do_sys_fstatfs+0x7f/0xe0 ? __pfx___do_sys_fstatfs+0x10/0x10 ? srso_alias_return_thunk+0x5/0x7f ? lockdep_hardirqs_on_prepare+0x136/0x200 ? srso_alias_return_thunk+0x5/0x7f do_syscall_64+0x3f/0x90 entry_SYSCALL_64_after_hwframe+0x6e/0xd8 Allocated by task 27534: kasan_save_stack+0x33/0x60 kasan_set_track+0x25/0x30 __kasan_kmalloc+0x8f/0xa0 open_cached_dir+0x71b/0x1240 [cifs] smb2_query_info_compound+0x5c3/0x6d0 [cifs] smb2_queryfs+0xc2/0x2c0 [cifs] smb311_queryfs+0x210/0x220 [cifs] cifs_statfs+0x18c/0x4b0 [cifs] statfs_by_dentry+0x9b/0xf0 fd_statfs+0x4e/0xb0 __do_sys_fstatfs+0x7f/0xe0 do_syscall_64+0x3f/0x90 entry_SYSCALL_64_after_hwframe+0x6e/0xd8 Freed by task 27534: kasan_save_stack+0x33/0x60 kasan_set_track+0x25/0x30 kasan_save_free_info+0x2b/0x50 ____kasan_slab_free+0x126/0x170 slab_free_freelist_hook+0xd0/0x1e0 __kmem_cache_free+0x9d/0x1b0 open_cached_dir+0xff5/0x1240 [cifs] smb2_query_info_compound+0x5c3/0x6d0 [cifs] smb2_queryfs+0xc2/0x2c0 [cifs] This is a race between open_cached_dir() and cached_dir_lease_break() where the cache entry for the open directory handle receives a lease break while creating it. And before returning from open_cached_dir(), we put the last reference of the new @cfid because of !@cfid->has_lease. Besides the UAF, while running xfstests a lot of missed lease breaks have been noticed in tests that run several concurrent statfs(2) calls on those cached fids CIFS: VFS: \\w22-root1.gandalf.test No task to wake, unknown frame... CIFS: VFS: \\w22-root1.gandalf.test Cmd: 18 Err: 0x0 Flags: 0x1... CIFS: VFS: \\w22-root1.gandalf.test smb buf 00000000715bfe83 len 108 CIFS: VFS: Dump pending requests: CIFS: VFS: \\w22-root1.gandalf.test No task to wake, unknown frame... CIFS: VFS: \\w22-root1.gandalf.test Cmd: 18 Err: 0x0 Flags: 0x1... CIFS: VFS: \\w22-root1.gandalf.test smb buf 000000005aa7316e len 108 ... To fix both, in open_cached_dir() ensure that @cfid->has_lease is set right before sending out compounded request so that any potential lease break will be get processed by demultiplex thread while we're still caching @cfid. And, if open failed for some reason, re-check @cfid->has_lease to decide whether or not put lease reference.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: ebe98f1447bbccf8228335c62d86af02a0ed23f7 , < 6db94d08359c43f2c8fe372811cdee04564a41b9 (git)
Affected: ebe98f1447bbccf8228335c62d86af02a0ed23f7 , < 93877b9afc2994c89362007aac480a7b150f386f (git)
Affected: ebe98f1447bbccf8228335c62d86af02a0ed23f7 , < 5c86919455c1edec99ebd3338ad213b59271a71b (git)
Create a notification for this product.
    Linux Linux Affected: 6.1
Unaffected: 0 , < 6.1 (semver)
Unaffected: 6.5.13 , ≤ 6.5.* (semver)
Unaffected: 6.6.3 , ≤ 6.6.* (semver)
Unaffected: 6.7 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "providerMetadata": {
          "dateUpdated": "2024-08-02T23:11:36.015Z",
          "orgId": "af854a3a-2127-422b-91ae-364da2661108",
          "shortName": "CVE"
        },
        "references": [
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/6db94d08359c43f2c8fe372811cdee04564a41b9"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/93877b9afc2994c89362007aac480a7b150f386f"
          },
          {
            "tags": [
              "x_transferred"
            ],
            "url": "https://git.kernel.org/stable/c/5c86919455c1edec99ebd3338ad213b59271a71b"
          }
        ],
        "title": "CVE Program Container"
      },
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2023-52751",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-09-10T15:37:15.794672Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2024-09-11T17:33:32.822Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/smb/client/cached_dir.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "6db94d08359c43f2c8fe372811cdee04564a41b9",
              "status": "affected",
              "version": "ebe98f1447bbccf8228335c62d86af02a0ed23f7",
              "versionType": "git"
            },
            {
              "lessThan": "93877b9afc2994c89362007aac480a7b150f386f",
              "status": "affected",
              "version": "ebe98f1447bbccf8228335c62d86af02a0ed23f7",
              "versionType": "git"
            },
            {
              "lessThan": "5c86919455c1edec99ebd3338ad213b59271a71b",
              "status": "affected",
              "version": "ebe98f1447bbccf8228335c62d86af02a0ed23f7",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/smb/client/cached_dir.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.1"
            },
            {
              "lessThan": "6.1",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.5.*",
              "status": "unaffected",
              "version": "6.5.13",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.3",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.7",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.5.13",
                  "versionStartIncluding": "6.1",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.3",
                  "versionStartIncluding": "6.1",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.7",
                  "versionStartIncluding": "6.1",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: fix use-after-free in smb2_query_info_compound()\n\nThe following UAF was triggered when running fstests generic/072 with\nKASAN enabled against Windows Server 2022 and mount options\n\u0027multichannel,max_channels=2,vers=3.1.1,mfsymlinks,noperm\u0027\n\n  BUG: KASAN: slab-use-after-free in smb2_query_info_compound+0x423/0x6d0 [cifs]\n  Read of size 8 at addr ffff888014941048 by task xfs_io/27534\n\n  CPU: 0 PID: 27534 Comm: xfs_io Not tainted 6.6.0-rc7 #1\n  Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS\n  rel-1.16.2-3-gd478f380-rebuilt.opensuse.org 04/01/2014\n  Call Trace:\n   dump_stack_lvl+0x4a/0x80\n   print_report+0xcf/0x650\n   ? srso_alias_return_thunk+0x5/0x7f\n   ? srso_alias_return_thunk+0x5/0x7f\n   ? __phys_addr+0x46/0x90\n   kasan_report+0xda/0x110\n   ? smb2_query_info_compound+0x423/0x6d0 [cifs]\n   ? smb2_query_info_compound+0x423/0x6d0 [cifs]\n   smb2_query_info_compound+0x423/0x6d0 [cifs]\n   ? __pfx_smb2_query_info_compound+0x10/0x10 [cifs]\n   ? srso_alias_return_thunk+0x5/0x7f\n   ? __stack_depot_save+0x39/0x480\n   ? kasan_save_stack+0x33/0x60\n   ? kasan_set_track+0x25/0x30\n   ? ____kasan_slab_free+0x126/0x170\n   smb2_queryfs+0xc2/0x2c0 [cifs]\n   ? __pfx_smb2_queryfs+0x10/0x10 [cifs]\n   ? __pfx___lock_acquire+0x10/0x10\n   smb311_queryfs+0x210/0x220 [cifs]\n   ? __pfx_smb311_queryfs+0x10/0x10 [cifs]\n   ? srso_alias_return_thunk+0x5/0x7f\n   ? __lock_acquire+0x480/0x26c0\n   ? lock_release+0x1ed/0x640\n   ? srso_alias_return_thunk+0x5/0x7f\n   ? do_raw_spin_unlock+0x9b/0x100\n   cifs_statfs+0x18c/0x4b0 [cifs]\n   statfs_by_dentry+0x9b/0xf0\n   fd_statfs+0x4e/0xb0\n   __do_sys_fstatfs+0x7f/0xe0\n   ? __pfx___do_sys_fstatfs+0x10/0x10\n   ? srso_alias_return_thunk+0x5/0x7f\n   ? lockdep_hardirqs_on_prepare+0x136/0x200\n   ? srso_alias_return_thunk+0x5/0x7f\n   do_syscall_64+0x3f/0x90\n   entry_SYSCALL_64_after_hwframe+0x6e/0xd8\n\n  Allocated by task 27534:\n   kasan_save_stack+0x33/0x60\n   kasan_set_track+0x25/0x30\n   __kasan_kmalloc+0x8f/0xa0\n   open_cached_dir+0x71b/0x1240 [cifs]\n   smb2_query_info_compound+0x5c3/0x6d0 [cifs]\n   smb2_queryfs+0xc2/0x2c0 [cifs]\n   smb311_queryfs+0x210/0x220 [cifs]\n   cifs_statfs+0x18c/0x4b0 [cifs]\n   statfs_by_dentry+0x9b/0xf0\n   fd_statfs+0x4e/0xb0\n   __do_sys_fstatfs+0x7f/0xe0\n   do_syscall_64+0x3f/0x90\n   entry_SYSCALL_64_after_hwframe+0x6e/0xd8\n\n  Freed by task 27534:\n   kasan_save_stack+0x33/0x60\n   kasan_set_track+0x25/0x30\n   kasan_save_free_info+0x2b/0x50\n   ____kasan_slab_free+0x126/0x170\n   slab_free_freelist_hook+0xd0/0x1e0\n   __kmem_cache_free+0x9d/0x1b0\n   open_cached_dir+0xff5/0x1240 [cifs]\n   smb2_query_info_compound+0x5c3/0x6d0 [cifs]\n   smb2_queryfs+0xc2/0x2c0 [cifs]\n\nThis is a race between open_cached_dir() and cached_dir_lease_break()\nwhere the cache entry for the open directory handle receives a lease\nbreak while creating it.  And before returning from open_cached_dir(),\nwe put the last reference of the new @cfid because of\n!@cfid-\u003ehas_lease.\n\nBesides the UAF, while running xfstests a lot of missed lease breaks\nhave been noticed in tests that run several concurrent statfs(2) calls\non those cached fids\n\n  CIFS: VFS: \\\\w22-root1.gandalf.test No task to wake, unknown frame...\n  CIFS: VFS: \\\\w22-root1.gandalf.test Cmd: 18 Err: 0x0 Flags: 0x1...\n  CIFS: VFS: \\\\w22-root1.gandalf.test smb buf 00000000715bfe83 len 108\n  CIFS: VFS: Dump pending requests:\n  CIFS: VFS: \\\\w22-root1.gandalf.test No task to wake, unknown frame...\n  CIFS: VFS: \\\\w22-root1.gandalf.test Cmd: 18 Err: 0x0 Flags: 0x1...\n  CIFS: VFS: \\\\w22-root1.gandalf.test smb buf 000000005aa7316e len 108\n  ...\n\nTo fix both, in open_cached_dir() ensure that @cfid-\u003ehas_lease is set\nright before sending out compounded request so that any potential\nlease break will be get processed by demultiplex thread while we\u0027re\nstill caching @cfid.  And, if open failed for some reason, re-check\n@cfid-\u003ehas_lease to decide whether or not put lease reference."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-01-05T10:17:07.109Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/6db94d08359c43f2c8fe372811cdee04564a41b9"
        },
        {
          "url": "https://git.kernel.org/stable/c/93877b9afc2994c89362007aac480a7b150f386f"
        },
        {
          "url": "https://git.kernel.org/stable/c/5c86919455c1edec99ebd3338ad213b59271a71b"
        }
      ],
      "title": "smb: client: fix use-after-free in smb2_query_info_compound()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2023-52751",
    "datePublished": "2024-05-21T15:30:40.226Z",
    "dateReserved": "2024-05-21T15:19:24.234Z",
    "dateUpdated": "2026-01-05T10:17:07.109Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CVE Program Container\", \"references\": [{\"url\": \"https://git.kernel.org/stable/c/6db94d08359c43f2c8fe372811cdee04564a41b9\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/93877b9afc2994c89362007aac480a7b150f386f\", \"tags\": [\"x_transferred\"]}, {\"url\": \"https://git.kernel.org/stable/c/5c86919455c1edec99ebd3338ad213b59271a71b\", \"tags\": [\"x_transferred\"]}], \"providerMetadata\": {\"orgId\": \"af854a3a-2127-422b-91ae-364da2661108\", \"shortName\": \"CVE\", \"dateUpdated\": \"2024-08-02T23:11:36.015Z\"}}, {\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2023-52751\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-09-10T15:37:15.794672Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-09-11T12:42:17.248Z\"}}], \"cna\": {\"title\": \"smb: client: fix use-after-free in smb2_query_info_compound()\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"ebe98f1447bbccf8228335c62d86af02a0ed23f7\", \"lessThan\": \"6db94d08359c43f2c8fe372811cdee04564a41b9\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"ebe98f1447bbccf8228335c62d86af02a0ed23f7\", \"lessThan\": \"93877b9afc2994c89362007aac480a7b150f386f\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"ebe98f1447bbccf8228335c62d86af02a0ed23f7\", \"lessThan\": \"5c86919455c1edec99ebd3338ad213b59271a71b\", \"versionType\": \"git\"}], \"programFiles\": [\"fs/smb/client/cached_dir.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"6.1\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"6.1\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"6.5.13\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.5.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.3\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.7\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"fs/smb/client/cached_dir.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/6db94d08359c43f2c8fe372811cdee04564a41b9\"}, {\"url\": \"https://git.kernel.org/stable/c/93877b9afc2994c89362007aac480a7b150f386f\"}, {\"url\": \"https://git.kernel.org/stable/c/5c86919455c1edec99ebd3338ad213b59271a71b\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nsmb: client: fix use-after-free in smb2_query_info_compound()\\n\\nThe following UAF was triggered when running fstests generic/072 with\\nKASAN enabled against Windows Server 2022 and mount options\\n\u0027multichannel,max_channels=2,vers=3.1.1,mfsymlinks,noperm\u0027\\n\\n  BUG: KASAN: slab-use-after-free in smb2_query_info_compound+0x423/0x6d0 [cifs]\\n  Read of size 8 at addr ffff888014941048 by task xfs_io/27534\\n\\n  CPU: 0 PID: 27534 Comm: xfs_io Not tainted 6.6.0-rc7 #1\\n  Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS\\n  rel-1.16.2-3-gd478f380-rebuilt.opensuse.org 04/01/2014\\n  Call Trace:\\n   dump_stack_lvl+0x4a/0x80\\n   print_report+0xcf/0x650\\n   ? srso_alias_return_thunk+0x5/0x7f\\n   ? srso_alias_return_thunk+0x5/0x7f\\n   ? __phys_addr+0x46/0x90\\n   kasan_report+0xda/0x110\\n   ? smb2_query_info_compound+0x423/0x6d0 [cifs]\\n   ? smb2_query_info_compound+0x423/0x6d0 [cifs]\\n   smb2_query_info_compound+0x423/0x6d0 [cifs]\\n   ? __pfx_smb2_query_info_compound+0x10/0x10 [cifs]\\n   ? srso_alias_return_thunk+0x5/0x7f\\n   ? __stack_depot_save+0x39/0x480\\n   ? kasan_save_stack+0x33/0x60\\n   ? kasan_set_track+0x25/0x30\\n   ? ____kasan_slab_free+0x126/0x170\\n   smb2_queryfs+0xc2/0x2c0 [cifs]\\n   ? __pfx_smb2_queryfs+0x10/0x10 [cifs]\\n   ? __pfx___lock_acquire+0x10/0x10\\n   smb311_queryfs+0x210/0x220 [cifs]\\n   ? __pfx_smb311_queryfs+0x10/0x10 [cifs]\\n   ? srso_alias_return_thunk+0x5/0x7f\\n   ? __lock_acquire+0x480/0x26c0\\n   ? lock_release+0x1ed/0x640\\n   ? srso_alias_return_thunk+0x5/0x7f\\n   ? do_raw_spin_unlock+0x9b/0x100\\n   cifs_statfs+0x18c/0x4b0 [cifs]\\n   statfs_by_dentry+0x9b/0xf0\\n   fd_statfs+0x4e/0xb0\\n   __do_sys_fstatfs+0x7f/0xe0\\n   ? __pfx___do_sys_fstatfs+0x10/0x10\\n   ? srso_alias_return_thunk+0x5/0x7f\\n   ? lockdep_hardirqs_on_prepare+0x136/0x200\\n   ? srso_alias_return_thunk+0x5/0x7f\\n   do_syscall_64+0x3f/0x90\\n   entry_SYSCALL_64_after_hwframe+0x6e/0xd8\\n\\n  Allocated by task 27534:\\n   kasan_save_stack+0x33/0x60\\n   kasan_set_track+0x25/0x30\\n   __kasan_kmalloc+0x8f/0xa0\\n   open_cached_dir+0x71b/0x1240 [cifs]\\n   smb2_query_info_compound+0x5c3/0x6d0 [cifs]\\n   smb2_queryfs+0xc2/0x2c0 [cifs]\\n   smb311_queryfs+0x210/0x220 [cifs]\\n   cifs_statfs+0x18c/0x4b0 [cifs]\\n   statfs_by_dentry+0x9b/0xf0\\n   fd_statfs+0x4e/0xb0\\n   __do_sys_fstatfs+0x7f/0xe0\\n   do_syscall_64+0x3f/0x90\\n   entry_SYSCALL_64_after_hwframe+0x6e/0xd8\\n\\n  Freed by task 27534:\\n   kasan_save_stack+0x33/0x60\\n   kasan_set_track+0x25/0x30\\n   kasan_save_free_info+0x2b/0x50\\n   ____kasan_slab_free+0x126/0x170\\n   slab_free_freelist_hook+0xd0/0x1e0\\n   __kmem_cache_free+0x9d/0x1b0\\n   open_cached_dir+0xff5/0x1240 [cifs]\\n   smb2_query_info_compound+0x5c3/0x6d0 [cifs]\\n   smb2_queryfs+0xc2/0x2c0 [cifs]\\n\\nThis is a race between open_cached_dir() and cached_dir_lease_break()\\nwhere the cache entry for the open directory handle receives a lease\\nbreak while creating it.  And before returning from open_cached_dir(),\\nwe put the last reference of the new @cfid because of\\n!@cfid-\u003ehas_lease.\\n\\nBesides the UAF, while running xfstests a lot of missed lease breaks\\nhave been noticed in tests that run several concurrent statfs(2) calls\\non those cached fids\\n\\n  CIFS: VFS: \\\\\\\\w22-root1.gandalf.test No task to wake, unknown frame...\\n  CIFS: VFS: \\\\\\\\w22-root1.gandalf.test Cmd: 18 Err: 0x0 Flags: 0x1...\\n  CIFS: VFS: \\\\\\\\w22-root1.gandalf.test smb buf 00000000715bfe83 len 108\\n  CIFS: VFS: Dump pending requests:\\n  CIFS: VFS: \\\\\\\\w22-root1.gandalf.test No task to wake, unknown frame...\\n  CIFS: VFS: \\\\\\\\w22-root1.gandalf.test Cmd: 18 Err: 0x0 Flags: 0x1...\\n  CIFS: VFS: \\\\\\\\w22-root1.gandalf.test smb buf 000000005aa7316e len 108\\n  ...\\n\\nTo fix both, in open_cached_dir() ensure that @cfid-\u003ehas_lease is set\\nright before sending out compounded request so that any potential\\nlease break will be get processed by demultiplex thread while we\u0027re\\nstill caching @cfid.  And, if open failed for some reason, re-check\\n@cfid-\u003ehas_lease to decide whether or not put lease reference.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.5.13\", \"versionStartIncluding\": \"6.1\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.3\", \"versionStartIncluding\": \"6.1\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.7\", \"versionStartIncluding\": \"6.1\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-01-05T10:17:07.109Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2023-52751\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-01-05T10:17:07.109Z\", \"dateReserved\": \"2024-05-21T15:19:24.234Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-05-21T15:30:40.226Z\", \"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.