CVE-2022-50076 (GCVE-0-2022-50076)

Vulnerability from cvelistv5 – Published: 2025-06-18 11:02 – Updated: 2025-06-18 11:02
VLAI?
Title
cifs: Fix memory leak on the deferred close
Summary
In the Linux kernel, the following vulnerability has been resolved: cifs: Fix memory leak on the deferred close xfstests on smb21 report kmemleak as below: unreferenced object 0xffff8881767d6200 (size 64): comm "xfs_io", pid 1284, jiffies 4294777434 (age 20.789s) hex dump (first 32 bytes): 80 5a d0 11 81 88 ff ff 78 8a aa 63 81 88 ff ff .Z......x..c.... 00 71 99 76 81 88 ff ff 00 00 00 00 00 00 00 00 .q.v............ backtrace: [<00000000ad04e6ea>] cifs_close+0x92/0x2c0 [<0000000028b93c82>] __fput+0xff/0x3f0 [<00000000d8116851>] task_work_run+0x85/0xc0 [<0000000027e14f9e>] do_exit+0x5e5/0x1240 [<00000000fb492b95>] do_group_exit+0x58/0xe0 [<00000000129a32d9>] __x64_sys_exit_group+0x28/0x30 [<00000000e3f7d8e9>] do_syscall_64+0x35/0x80 [<00000000102e8a0b>] entry_SYSCALL_64_after_hwframe+0x46/0xb0 When cancel the deferred close work, we should also cleanup the struct cifs_deferred_close.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 9e992755be8f2d458a0bcbefd19e493483c1dba2 , < 860efae127888ae535bc4eda1b7f27642727c69e (git)
Affected: 9e992755be8f2d458a0bcbefd19e493483c1dba2 , < 60b6d38add7b9c17d6e5d49ee8e930ea1a5650c5 (git)
Affected: 9e992755be8f2d458a0bcbefd19e493483c1dba2 , < ca08d0eac020d48a3141dbec0a3cf64fbdb17cde (git)
Affected: 0ca6ac8a2691762307beaa4841255d1cfe6b2684 (git)
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    Linux Linux Affected: 5.14
Unaffected: 0 , < 5.14 (semver)
Unaffected: 5.15.63 , ≤ 5.15.* (semver)
Unaffected: 5.19.4 , ≤ 5.19.* (semver)
Unaffected: 6.0 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/cifs/misc.c"
          ],
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              "status": "unaffected",
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              "versionType": "semver"
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              "status": "unaffected",
              "version": "5.19.4",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "6.0",
              "versionType": "original_commit_for_fix"
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                  "versionEndExcluding": "5.15.63",
                  "versionStartIncluding": "5.14",
                  "vulnerable": true
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              ],
              "negate": false,
              "operator": "OR"
            }
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncifs: Fix memory leak on the deferred close\n\nxfstests on smb21 report kmemleak as below:\n\n  unreferenced object 0xffff8881767d6200 (size 64):\n    comm \"xfs_io\", pid 1284, jiffies 4294777434 (age 20.789s)\n    hex dump (first 32 bytes):\n      80 5a d0 11 81 88 ff ff 78 8a aa 63 81 88 ff ff  .Z......x..c....\n      00 71 99 76 81 88 ff ff 00 00 00 00 00 00 00 00  .q.v............\n    backtrace:\n      [\u003c00000000ad04e6ea\u003e] cifs_close+0x92/0x2c0\n      [\u003c0000000028b93c82\u003e] __fput+0xff/0x3f0\n      [\u003c00000000d8116851\u003e] task_work_run+0x85/0xc0\n      [\u003c0000000027e14f9e\u003e] do_exit+0x5e5/0x1240\n      [\u003c00000000fb492b95\u003e] do_group_exit+0x58/0xe0\n      [\u003c00000000129a32d9\u003e] __x64_sys_exit_group+0x28/0x30\n      [\u003c00000000e3f7d8e9\u003e] do_syscall_64+0x35/0x80\n      [\u003c00000000102e8a0b\u003e] entry_SYSCALL_64_after_hwframe+0x46/0xb0\n\nWhen cancel the deferred close work, we should also cleanup the struct\ncifs_deferred_close."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-06-18T11:02:19.514Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/860efae127888ae535bc4eda1b7f27642727c69e"
        },
        {
          "url": "https://git.kernel.org/stable/c/60b6d38add7b9c17d6e5d49ee8e930ea1a5650c5"
        },
        {
          "url": "https://git.kernel.org/stable/c/ca08d0eac020d48a3141dbec0a3cf64fbdb17cde"
        }
      ],
      "title": "cifs: Fix memory leak on the deferred close",
      "x_generator": {
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-50076",
    "datePublished": "2025-06-18T11:02:19.514Z",
    "dateReserved": "2025-06-18T10:57:27.408Z",
    "dateUpdated": "2025-06-18T11:02:19.514Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}


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