CVE-2022-48816 (GCVE-0-2022-48816)

Vulnerability from cvelistv5 – Published: 2024-07-16 11:44 – Updated: 2026-08-05 08:52
VLAI
Title
SUNRPC: lock against ->sock changing during sysfs read
Summary
In the Linux kernel, the following vulnerability has been resolved: SUNRPC: lock against ->sock changing during sysfs read ->sock can be set to NULL asynchronously unless ->recv_mutex is held. So it is important to hold that mutex. Otherwise a sysfs read can trigger an oops. Commit 17f09d3f619a ("SUNRPC: Check if the xprt is connected before handling sysfs reads") appears to attempt to fix this problem, but it only narrows the race window.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: a8482488a7d6d320f63a9ee1912dbb5ae5b80a61 , < fdc42287ae3f8a35cc2098307f52d7864b4bc8ed (git)
Affected: a8482488a7d6d320f63a9ee1912dbb5ae5b80a61 , < 9482ab4540f5bcc869b44c067ae99b5fca16bd07 (git)
Affected: a8482488a7d6d320f63a9ee1912dbb5ae5b80a61 , < b49ea673e119f59c71645e2f65b3ccad857c90ee (git)
Affected: 21a2be1a5145d072deedc7cdc5b2d17380abea75 (git)
Affected: 77876473912d1bf1ed16bffa1674e5ff0f499f25 (git)
Affected: 5.10.67 , < 5.11 (semver)
Affected: 5.13.19 , < 5.14 (semver)
Create a notification for this product.
Linux Linux Affected: 5.14
Unaffected: 0 , < 5.14 (semver)
Unaffected: 5.15.209 , ≤ 5.15.* (semver)
Unaffected: 5.16.10 , ≤ 5.16.* (semver)
Unaffected: 5.17 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Show details on NVD website
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no separate victim action such as opening a crafted file or mounting a filesystem is required at exploit time.\\nS:U - Impact is confined to the local host kernel (oops or socket UAF within SUNRPC/socket heap state) and does not cross a VM, IOMMU, or other security-authority boundary.\\nC:H - Without recv_mutex, a non-NULL sock pointer can be loaded then used after xs_reset_transport()\u0027s fput frees the socket, a classic socket UAF that heap spraying can turn into arbitrary kernel memory disclosure.\\nI:H - The same unlocked race allows use-after-free of the struct socket while kernel_getsockname/xs_sock_getport runs, enabling reclaim and corruption of adjacent heap state for arbitrary write and control-flow hijacking under standard UAF exploitation.\\nA:H - The documented failure mode is a kernel oops from NULL sock dereference during sysfs read, and the UAF path likewise crashes on stale socket use, so availability impact is High even without a full exploit.\"}]}], \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"a8482488a7d6d320f63a9ee1912dbb5ae5b80a61\", \"lessThan\": \"fdc42287ae3f8a35cc2098307f52d7864b4bc8ed\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"a8482488a7d6d320f63a9ee1912dbb5ae5b80a61\", \"lessThan\": \"9482ab4540f5bcc869b44c067ae99b5fca16bd07\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"a8482488a7d6d320f63a9ee1912dbb5ae5b80a61\", \"lessThan\": \"b49ea673e119f59c71645e2f65b3ccad857c90ee\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"21a2be1a5145d072deedc7cdc5b2d17380abea75\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"77876473912d1bf1ed16bffa1674e5ff0f499f25\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"5.10.67\", \"lessThan\": \"5.11\", \"versionType\": \"semver\"}, {\"status\": \"affected\", \"version\": \"5.13.19\", \"lessThan\": \"5.14\", \"versionType\": \"semver\"}], \"programFiles\": [\"net/sunrpc/sysfs.c\", \"net/sunrpc/xprtsock.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.14\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"5.14\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.15.209\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"5.16.10\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.16.*\"}, {\"status\": \"unaffected\", \"version\": \"5.17\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"net/sunrpc/sysfs.c\", \"net/sunrpc/xprtsock.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/fdc42287ae3f8a35cc2098307f52d7864b4bc8ed\"}, {\"url\": \"https://git.kernel.org/stable/c/9482ab4540f5bcc869b44c067ae99b5fca16bd07\"}, {\"url\": \"https://git.kernel.org/stable/c/b49ea673e119f59c71645e2f65b3ccad857c90ee\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nSUNRPC: lock against -\u003esock changing during sysfs read\\n\\n-\u003esock can be set to NULL asynchronously unless -\u003erecv_mutex is held.\\nSo it is important to hold that mutex.  Otherwise a sysfs read can\\ntrigger an oops.\\nCommit 17f09d3f619a (\\\"SUNRPC: Check if the xprt is connected before\\nhandling sysfs reads\\\") appears to attempt to fix this problem, but it\\nonly narrows the race window.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.209\", \"versionStartIncluding\": \"5.14\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.16.10\", \"versionStartIncluding\": \"5.14\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.17\", \"versionStartIncluding\": \"5.14\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"5.10.67\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"5.13.19\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-08-05T08:52:28.866Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2022-48816\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-05T08:52:28.866Z\", \"dateReserved\": \"2024-07-16T11:38:08.900Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-07-16T11:44:04.654Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

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.