CVE-2022-49276 (GCVE-0-2022-49276)

Vulnerability from cvelistv5 – Published: 2025-02-26 01:56 – Updated: 2025-10-01 19:47
VLAI?
Title
jffs2: fix memory leak in jffs2_scan_medium
Summary
In the Linux kernel, the following vulnerability has been resolved: jffs2: fix memory leak in jffs2_scan_medium If an error is returned in jffs2_scan_eraseblock() and some memory has been added to the jffs2_summary *s, we can observe the following kmemleak report: -------------------------------------------- unreferenced object 0xffff88812b889c40 (size 64): comm "mount", pid 692, jiffies 4294838325 (age 34.288s) hex dump (first 32 bytes): 40 48 b5 14 81 88 ff ff 01 e0 31 00 00 00 50 00 @H........1...P. 00 00 01 00 00 00 01 00 00 00 02 00 00 00 09 08 ................ backtrace: [<ffffffffae93a3a3>] __kmalloc+0x613/0x910 [<ffffffffaf423b9c>] jffs2_sum_add_dirent_mem+0x5c/0xa0 [<ffffffffb0f3afa8>] jffs2_scan_medium.cold+0x36e5/0x4794 [<ffffffffb0f3dbe1>] jffs2_do_mount_fs.cold+0xa7/0x2267 [<ffffffffaf40acf3>] jffs2_do_fill_super+0x383/0xc30 [<ffffffffaf40c00a>] jffs2_fill_super+0x2ea/0x4c0 [<ffffffffb0315d64>] mtd_get_sb+0x254/0x400 [<ffffffffb0315f5f>] mtd_get_sb_by_nr+0x4f/0xd0 [<ffffffffb0316478>] get_tree_mtd+0x498/0x840 [<ffffffffaf40bd15>] jffs2_get_tree+0x25/0x30 [<ffffffffae9f358d>] vfs_get_tree+0x8d/0x2e0 [<ffffffffaea7a98f>] path_mount+0x50f/0x1e50 [<ffffffffaea7c3d7>] do_mount+0x107/0x130 [<ffffffffaea7c5c5>] __se_sys_mount+0x1c5/0x2f0 [<ffffffffaea7c917>] __x64_sys_mount+0xc7/0x160 [<ffffffffb10142f5>] do_syscall_64+0x45/0x70 unreferenced object 0xffff888114b54840 (size 32): comm "mount", pid 692, jiffies 4294838325 (age 34.288s) hex dump (first 32 bytes): c0 75 b5 14 81 88 ff ff 02 e0 02 00 00 00 02 00 .u.............. 00 00 84 00 00 00 44 00 00 00 6b 6b 6b 6b 6b a5 ......D...kkkkk. backtrace: [<ffffffffae93be24>] kmem_cache_alloc_trace+0x584/0x880 [<ffffffffaf423b04>] jffs2_sum_add_inode_mem+0x54/0x90 [<ffffffffb0f3bd44>] jffs2_scan_medium.cold+0x4481/0x4794 [...] unreferenced object 0xffff888114b57280 (size 32): comm "mount", pid 692, jiffies 4294838393 (age 34.357s) hex dump (first 32 bytes): 10 d5 6c 11 81 88 ff ff 08 e0 05 00 00 00 01 00 ..l............. 00 00 38 02 00 00 28 00 00 00 6b 6b 6b 6b 6b a5 ..8...(...kkkkk. backtrace: [<ffffffffae93be24>] kmem_cache_alloc_trace+0x584/0x880 [<ffffffffaf423c34>] jffs2_sum_add_xattr_mem+0x54/0x90 [<ffffffffb0f3a24f>] jffs2_scan_medium.cold+0x298c/0x4794 [...] unreferenced object 0xffff8881116cd510 (size 16): comm "mount", pid 692, jiffies 4294838395 (age 34.355s) hex dump (first 16 bytes): 00 00 00 00 00 00 00 00 09 e0 60 02 00 00 6b a5 ..........`...k. backtrace: [<ffffffffae93be24>] kmem_cache_alloc_trace+0x584/0x880 [<ffffffffaf423cc4>] jffs2_sum_add_xref_mem+0x54/0x90 [<ffffffffb0f3b2e3>] jffs2_scan_medium.cold+0x3a20/0x4794 [...] -------------------------------------------- Therefore, we should call jffs2_sum_reset_collected(s) on exit to release the memory added in s. In addition, a new tag "out_buf" is added to prevent the NULL pointer reference caused by s being NULL. (thanks to Zhang Yi for this analysis)
Severity ?
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE
  • CWE-401 - Missing Release of Memory after Effective Lifetime
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: e631ddba588783edd521c5a89f7b2902772fb691 , < 9b0c69182f09b70779817af4dcf89780955d5c4c (git)
Affected: e631ddba588783edd521c5a89f7b2902772fb691 , < b36bccb04e14cc0c1e2d0e92d477fe220314fad6 (git)
Affected: e631ddba588783edd521c5a89f7b2902772fb691 , < e711913463af916d777a4873068f415f1fe2ad33 (git)
Affected: e631ddba588783edd521c5a89f7b2902772fb691 , < 455f4a23490bfcbedc8e5c245c463a59b19e5ddd (git)
Affected: e631ddba588783edd521c5a89f7b2902772fb691 , < 51dbb5e36d59f62e34d462b801c1068248149cfe (git)
Affected: e631ddba588783edd521c5a89f7b2902772fb691 , < 52ba0ab4f0a606f02a6163493378989faa1ec10a (git)
Affected: e631ddba588783edd521c5a89f7b2902772fb691 , < b26bbc0c122cad038831f226a4cb4de702225e16 (git)
Affected: e631ddba588783edd521c5a89f7b2902772fb691 , < 82462324bf35b6b553400af1c1aa265069cee28f (git)
Affected: e631ddba588783edd521c5a89f7b2902772fb691 , < 9cdd3128874f5fe759e2c4e1360ab7fb96a8d1df (git)
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    Linux Linux Affected: 2.6.15
Unaffected: 0 , < 2.6.15 (semver)
Unaffected: 4.9.311 , ≤ 4.9.* (semver)
Unaffected: 4.14.276 , ≤ 4.14.* (semver)
Unaffected: 4.19.238 , ≤ 4.19.* (semver)
Unaffected: 5.4.189 , ≤ 5.4.* (semver)
Unaffected: 5.10.110 , ≤ 5.10.* (semver)
Unaffected: 5.15.33 , ≤ 5.15.* (semver)
Unaffected: 5.16.19 , ≤ 5.16.* (semver)
Unaffected: 5.17.2 , ≤ 5.17.* (semver)
Unaffected: 5.18 , ≤ * (original_commit_for_fix)
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\njffs2: fix memory leak in jffs2_scan_medium\n\nIf an error is returned in jffs2_scan_eraseblock() and some memory\nhas been added to the jffs2_summary *s, we can observe the following\nkmemleak report:\n\n--------------------------------------------\nunreferenced object 0xffff88812b889c40 (size 64):\n  comm \"mount\", pid 692, jiffies 4294838325 (age 34.288s)\n  hex dump (first 32 bytes):\n    40 48 b5 14 81 88 ff ff 01 e0 31 00 00 00 50 00  @H........1...P.\n    00 00 01 00 00 00 01 00 00 00 02 00 00 00 09 08  ................\n  backtrace:\n    [\u003cffffffffae93a3a3\u003e] __kmalloc+0x613/0x910\n    [\u003cffffffffaf423b9c\u003e] jffs2_sum_add_dirent_mem+0x5c/0xa0\n    [\u003cffffffffb0f3afa8\u003e] jffs2_scan_medium.cold+0x36e5/0x4794\n    [\u003cffffffffb0f3dbe1\u003e] jffs2_do_mount_fs.cold+0xa7/0x2267\n    [\u003cffffffffaf40acf3\u003e] jffs2_do_fill_super+0x383/0xc30\n    [\u003cffffffffaf40c00a\u003e] jffs2_fill_super+0x2ea/0x4c0\n    [\u003cffffffffb0315d64\u003e] mtd_get_sb+0x254/0x400\n    [\u003cffffffffb0315f5f\u003e] mtd_get_sb_by_nr+0x4f/0xd0\n    [\u003cffffffffb0316478\u003e] get_tree_mtd+0x498/0x840\n    [\u003cffffffffaf40bd15\u003e] jffs2_get_tree+0x25/0x30\n    [\u003cffffffffae9f358d\u003e] vfs_get_tree+0x8d/0x2e0\n    [\u003cffffffffaea7a98f\u003e] path_mount+0x50f/0x1e50\n    [\u003cffffffffaea7c3d7\u003e] do_mount+0x107/0x130\n    [\u003cffffffffaea7c5c5\u003e] __se_sys_mount+0x1c5/0x2f0\n    [\u003cffffffffaea7c917\u003e] __x64_sys_mount+0xc7/0x160\n    [\u003cffffffffb10142f5\u003e] do_syscall_64+0x45/0x70\nunreferenced object 0xffff888114b54840 (size 32):\n  comm \"mount\", pid 692, jiffies 4294838325 (age 34.288s)\n  hex dump (first 32 bytes):\n    c0 75 b5 14 81 88 ff ff 02 e0 02 00 00 00 02 00  .u..............\n    00 00 84 00 00 00 44 00 00 00 6b 6b 6b 6b 6b a5  ......D...kkkkk.\n  backtrace:\n    [\u003cffffffffae93be24\u003e] kmem_cache_alloc_trace+0x584/0x880\n    [\u003cffffffffaf423b04\u003e] jffs2_sum_add_inode_mem+0x54/0x90\n    [\u003cffffffffb0f3bd44\u003e] jffs2_scan_medium.cold+0x4481/0x4794\n    [...]\nunreferenced object 0xffff888114b57280 (size 32):\n  comm \"mount\", pid 692, jiffies 4294838393 (age 34.357s)\n  hex dump (first 32 bytes):\n    10 d5 6c 11 81 88 ff ff 08 e0 05 00 00 00 01 00  ..l.............\n    00 00 38 02 00 00 28 00 00 00 6b 6b 6b 6b 6b a5  ..8...(...kkkkk.\n  backtrace:\n    [\u003cffffffffae93be24\u003e] kmem_cache_alloc_trace+0x584/0x880\n    [\u003cffffffffaf423c34\u003e] jffs2_sum_add_xattr_mem+0x54/0x90\n    [\u003cffffffffb0f3a24f\u003e] jffs2_scan_medium.cold+0x298c/0x4794\n    [...]\nunreferenced object 0xffff8881116cd510 (size 16):\n  comm \"mount\", pid 692, jiffies 4294838395 (age 34.355s)\n  hex dump (first 16 bytes):\n    00 00 00 00 00 00 00 00 09 e0 60 02 00 00 6b a5  ..........`...k.\n  backtrace:\n    [\u003cffffffffae93be24\u003e] kmem_cache_alloc_trace+0x584/0x880\n    [\u003cffffffffaf423cc4\u003e] jffs2_sum_add_xref_mem+0x54/0x90\n    [\u003cffffffffb0f3b2e3\u003e] jffs2_scan_medium.cold+0x3a20/0x4794\n    [...]\n--------------------------------------------\n\nTherefore, we should call jffs2_sum_reset_collected(s) on exit to\nrelease the memory added in s. In addition, a new tag \"out_buf\" is\nadded to prevent the NULL pointer reference caused by s being NULL.\n(thanks to Zhang Yi for this analysis)"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-05-04T08:33:59.667Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/9b0c69182f09b70779817af4dcf89780955d5c4c"
        },
        {
          "url": "https://git.kernel.org/stable/c/b36bccb04e14cc0c1e2d0e92d477fe220314fad6"
        },
        {
          "url": "https://git.kernel.org/stable/c/e711913463af916d777a4873068f415f1fe2ad33"
        },
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          "url": "https://git.kernel.org/stable/c/455f4a23490bfcbedc8e5c245c463a59b19e5ddd"
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        {
          "url": "https://git.kernel.org/stable/c/51dbb5e36d59f62e34d462b801c1068248149cfe"
        },
        {
          "url": "https://git.kernel.org/stable/c/52ba0ab4f0a606f02a6163493378989faa1ec10a"
        },
        {
          "url": "https://git.kernel.org/stable/c/b26bbc0c122cad038831f226a4cb4de702225e16"
        },
        {
          "url": "https://git.kernel.org/stable/c/82462324bf35b6b553400af1c1aa265069cee28f"
        },
        {
          "url": "https://git.kernel.org/stable/c/9cdd3128874f5fe759e2c4e1360ab7fb96a8d1df"
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      "title": "jffs2: fix memory leak in jffs2_scan_medium",
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-49276",
    "datePublished": "2025-02-26T01:56:20.559Z",
    "dateReserved": "2025-02-26T01:49:39.298Z",
    "dateUpdated": "2025-10-01T19:47:01.833Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}


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Sightings

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  • 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.



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