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CVE-2022-48782 (GCVE-0-2022-48782)

Vulnerability from cvelistv5 – Published: 2024-07-16 11:13 – Updated: 2026-08-05 08:52
VLAI
Title
mctp: fix use after free
Summary
In the Linux kernel, the following vulnerability has been resolved: mctp: fix use after free Clang static analysis reports this problem route.c:425:4: warning: Use of memory after it is freed trace_mctp_key_acquire(key); ^~~~~~~~~~~~~~~~~~~~~~~~~~~ When mctp_key_add() fails, key is freed but then is later used in trace_mctp_key_acquire(). Add an else statement to use the key only when mctp_key_add() is successful.
Severity
8.8 (High)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-09-10 17:00 UTC
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 4f9e1ba6de45aa8797a83f1fe5b82ec4bac16899 , < 1dd3ecbec5f606b2a526c47925c8634b1a6bb81e (git)
Affected: 4f9e1ba6de45aa8797a83f1fe5b82ec4bac16899 , < 7e5b6a5c8c44310784c88c1c198dde79f6402f7b (git)
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Linux Linux Affected: 5.16
Unaffected: 0 , < 5.16 (semver)
Unaffected: 5.16.11 , ≤ 5.16.* (semver)
Unaffected: 5.17 , ≤ * (original_commit_for_fix)
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An on-bus peer needs no local account; CAP_NET_* checks apply only to AF_MCTP bind/sendto, not to wire reception.\\nUI:N - Exploitation requires only attacker-sent MCTP frames toward a host with MCTP routing/sockets configured; no victim user action is required.\\nS:U - Impact is memory corruption in the receiving kernel\\u2019s MCTP stack and does not cross a separate security authority such as a guest-to-host or IOMMU boundary.\\nC:H - Use-after-free of struct mctp_sk_key (trace read plus mctp_key_unref on freed storage) enables heap reuse and disclosure of attacker-controlled or adjacent kernel memory.\\nI:H - The same UAF/double-free path yields a heap corruption primitive that can be turned into arbitrary write or control-flow hijacking via standard slab shaping.\\nA:H - Dereferencing and re-freeing the dropped key causes kernel oops/panic or heap allocator corruption, so availability impact is High even without full exploitation.\"}]}], \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"4f9e1ba6de45aa8797a83f1fe5b82ec4bac16899\", \"lessThan\": \"1dd3ecbec5f606b2a526c47925c8634b1a6bb81e\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"4f9e1ba6de45aa8797a83f1fe5b82ec4bac16899\", \"lessThan\": \"7e5b6a5c8c44310784c88c1c198dde79f6402f7b\", \"versionType\": \"git\"}], \"programFiles\": [\"net/mctp/route.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.16\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"5.16\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.16.11\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.16.*\"}, {\"status\": \"unaffected\", \"version\": \"5.17\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"net/mctp/route.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/1dd3ecbec5f606b2a526c47925c8634b1a6bb81e\"}, {\"url\": \"https://git.kernel.org/stable/c/7e5b6a5c8c44310784c88c1c198dde79f6402f7b\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nmctp: fix use after free\\n\\nClang static analysis reports this problem\\nroute.c:425:4: warning: Use of memory after it is freed\\n  trace_mctp_key_acquire(key);\\n  ^~~~~~~~~~~~~~~~~~~~~~~~~~~\\nWhen mctp_key_add() fails, key is freed but then is later\\nused in trace_mctp_key_acquire().  Add an else statement\\nto use the key only when mctp_key_add() is successful.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.16.11\", \"versionStartIncluding\": \"5.16\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.17\", \"versionStartIncluding\": \"5.16\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-08-05T08:52:14.211Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2022-48782\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-05T08:52:14.211Z\", \"dateReserved\": \"2024-06-20T11:09:39.068Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-07-16T11:13:19.141Z\", \"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.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.