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

Vulnerability from cvelistv5 – Published: 2025-06-18 11:02 – Updated: 2026-05-23 15:23
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)
Affected: 5.13.12 , < 5.14 (semver)
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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": {
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/cifs/misc.c"
          ],
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          "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."
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        "dateUpdated": "2026-05-23T15:23:39.604Z",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2022-50076",
    "datePublished": "2025-06-18T11:02:19.514Z",
    "dateReserved": "2025-06-18T10:57:27.408Z",
    "dateUpdated": "2026-05-23T15:23:39.604Z",
    "state": "PUBLISHED"
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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.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: cifs: Se corrige la p\u00e9rdida de memoria en el cierre diferido. xfstests en smb21 informa kmemleak como se muestra a continuaci\u00f3n: objeto sin referencia 0xffff8881767d6200 (tama\u00f1o 64): comm \\\"xfs_io\\\", pid 1284, jiffies 4294777434 (edad 20,789 s) volcado hexadecimal (primeros 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 .qv........... backtrace: [\u0026lt;00000000ad04e6ea\u0026gt;] cifs_close+0x92/0x2c0 [\u0026lt;0000000028b93c82\u0026gt;] __fput+0xff/0x3f0 [\u0026lt;00000000d8116851\u0026gt;] task_work_run+0x85/0xc0 [\u0026lt;0000000027e14f9e\u0026gt;] do_exit+0x5e5/0x1240 [\u0026lt;00000000fb492b95\u0026gt;] do_group_exit+0x58/0xe0 [\u0026lt;00000000129a32d9\u0026gt;] __x64_sys_exit_group+0x28/0x30 [\u0026lt;00000000e3f7d8e9\u0026gt;] do_syscall_64+0x35/0x80 [\u0026lt;00000000102e8a0b\u0026gt;] entry_SYSCALL_64_after_hwframe+0x46/0xb0 Cuando cancelamos el trabajo de cierre diferido, tambi\u00e9n debemos limpiar la estructura cifs_deferred_close.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-401\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.13.12\",\"versionEndExcluding\":\"5.14\",\"matchCriteriaId\":\"A6734076-32F7-4DF9-9522-F5BC3760B69A\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.14.1\",\"versionEndExcluding\":\"5.15.63\",\"matchCriteriaId\":\"BC3E27E7-4372-46C2-8000-25E25F439B83\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"5.19.4\",\"matchCriteriaId\":\"0E669300-DA42-4ACD-86D8-68BE5F29FB88\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.14:-:*:*:*:*:*:*\",\"matchCriteriaId\":\"6A05198E-F8FA-4517-8D0E-8C95066AED38\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.14:rc6:*:*:*:*:*:*\",\"matchCriteriaId\":\"15013998-4AF0-4CDC-AB13-829ECD8A8E66\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.14:rc7:*:*:*:*:*:*\",\"matchCriteriaId\":\"376A25CF-C05B-48F1-99B1-8FB0314A8E06\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.0:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"E8BD11A3-8643-49B6-BADE-5029A0117325\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/60b6d38add7b9c17d6e5d49ee8e930ea1a5650c5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/860efae127888ae535bc4eda1b7f27642727c69e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/ca08d0eac020d48a3141dbec0a3cf64fbdb17cde\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}"
  }
}


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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.
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  • 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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