CVE-2026-53225 (GCVE-0-2026-53225)
Vulnerability from cvelistv5
Published
2026-06-25 08:39
Modified
2026-10-19 19:57
Severity ?
9.1 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: sctp: fix uninit-value in __sctp_rcv_asconf_lookup() __sctp_rcv_asconf_lookup() in net/sctp/input.c only checks that the ASCONF chunk can hold the ADDIP header and a parameter header, then calls af->from_addr_param(), which reads the full address (16 bytes for IPv6) trusting the parameter's declared length. An unauthenticated peer can send a truncated trailing ASCONF chunk that declares an IPv6 address parameter but stops after the 4-byte parameter header; reached from the no-association lookup path, from_addr_param() then reads uninitialized bytes past the parameter. Impact: an unauthenticated SCTP peer makes the receive path read up to 16 bytes of uninitialized memory past a truncated ASCONF address parameter. The sibling __sctp_rcv_init_lookup() bounds parameters with sctp_walk_params(); this path open-codes the fetch and omits the bound. Verify the whole address parameter lies within the chunk before from_addr_param() reads it, the same class of fix as commit 51e5ad549c43 ("net: sctp: fix KMSAN uninit-value in sctp_inq_pop").
References
Impacted products
Vendor Product Version
Linux Linux Version: df21857714398acb8b24a8bb5a6d2286dd9c59ef
Version: df21857714398acb8b24a8bb5a6d2286dd9c59ef
Version: df21857714398acb8b24a8bb5a6d2286dd9c59ef
Version: df21857714398acb8b24a8bb5a6d2286dd9c59ef
Version: df21857714398acb8b24a8bb5a6d2286dd9c59ef
Version: df21857714398acb8b24a8bb5a6d2286dd9c59ef
Version: df21857714398acb8b24a8bb5a6d2286dd9c59ef
Version: df21857714398acb8b24a8bb5a6d2286dd9c59ef
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    "datePublished": "2026-06-25T08:39:25.911Z",
    "dateReserved": "2026-06-09T07:44:35.392Z",
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Under the provided guidance, this is scored High because it is an OOB read not strictly limited to a few harmless bytes.\\nI:N - The vulnerable operation reads bytes into a temporary SCTP address used for lookup and does not write attacker data to kernel structures. No direct integrity modification or control-flow overwrite is present.\\nA:H - The malformed packet can repeatedly trigger an invalid kernel receive-path read, and such out-of-bounds reads can fault or panic on hardened/sanitized deployments. With uncertainty resolved upward, availability impact is High.\"}]}], \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"df21857714398acb8b24a8bb5a6d2286dd9c59ef\", \"lessThan\": \"446e0ecd845abc394b24ae2030a883572bec9d16\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"df21857714398acb8b24a8bb5a6d2286dd9c59ef\", \"lessThan\": \"928dd94db23e8ba340f83d68f7f24d831b7a4426\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"df21857714398acb8b24a8bb5a6d2286dd9c59ef\", \"lessThan\": \"d796cfd06074b579d265b28401306cadd30db945\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"df21857714398acb8b24a8bb5a6d2286dd9c59ef\", \"lessThan\": \"8ce96f1182644079249a24ac7e2ffc32e0301a46\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"df21857714398acb8b24a8bb5a6d2286dd9c59ef\", \"lessThan\": \"d6bd0bb7697ea8c0387b0d9d973453f479017b23\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"df21857714398acb8b24a8bb5a6d2286dd9c59ef\", \"lessThan\": \"f76a8b323e28e0951f979dbef20a7496383c47df\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"df21857714398acb8b24a8bb5a6d2286dd9c59ef\", \"lessThan\": \"8e86817b8af4d552f3c6fe04ca52bb0c8c57411d\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"df21857714398acb8b24a8bb5a6d2286dd9c59ef\", \"lessThan\": \"f8373d7090b745728de66308deeecc67e8d319ce\", \"versionType\": \"git\"}], \"programFiles\": [\"net/sctp/input.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"2.6.25\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"2.6.25\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.10.259\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.210\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.176\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.143\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.12.94\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.12.*\"}, {\"status\": \"unaffected\", \"version\": \"6.18.36\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.18.*\"}, {\"status\": \"unaffected\", \"version\": \"7.0.13\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"7.0.*\"}, {\"status\": \"unaffected\", \"version\": \"7.1\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"net/sctp/input.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/446e0ecd845abc394b24ae2030a883572bec9d16\"}, {\"url\": \"https://git.kernel.org/stable/c/928dd94db23e8ba340f83d68f7f24d831b7a4426\"}, {\"url\": \"https://git.kernel.org/stable/c/d796cfd06074b579d265b28401306cadd30db945\"}, {\"url\": \"https://git.kernel.org/stable/c/8ce96f1182644079249a24ac7e2ffc32e0301a46\"}, {\"url\": \"https://git.kernel.org/stable/c/d6bd0bb7697ea8c0387b0d9d973453f479017b23\"}, {\"url\": \"https://git.kernel.org/stable/c/f76a8b323e28e0951f979dbef20a7496383c47df\"}, {\"url\": \"https://git.kernel.org/stable/c/8e86817b8af4d552f3c6fe04ca52bb0c8c57411d\"}, {\"url\": \"https://git.kernel.org/stable/c/f8373d7090b745728de66308deeecc67e8d319ce\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nsctp: fix uninit-value in __sctp_rcv_asconf_lookup()\\n\\n__sctp_rcv_asconf_lookup() in net/sctp/input.c only checks that the ASCONF\\nchunk can hold the ADDIP header and a parameter header, then calls\\naf-\u003efrom_addr_param(), which reads the full address (16 bytes for IPv6)\\ntrusting the parameter\u0027s declared length.\\n\\nAn unauthenticated peer can send a truncated trailing ASCONF chunk that\\ndeclares an IPv6 address parameter but stops after the 4-byte parameter\\nheader; reached from the no-association lookup path, from_addr_param() then\\nreads uninitialized bytes past the parameter.\\n\\nImpact: an unauthenticated SCTP peer makes the receive path read up to 16\\nbytes of uninitialized memory past a truncated ASCONF address parameter.\\n\\nThe sibling __sctp_rcv_init_lookup() bounds parameters with\\nsctp_walk_params(); this path open-codes the fetch and omits the bound.\\nVerify the whole address parameter lies within the chunk before\\nfrom_addr_param() reads it, the same class of fix as commit 51e5ad549c43\\n(\\\"net: sctp: fix KMSAN uninit-value in sctp_inq_pop\\\").\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.259\", \"versionStartIncluding\": \"2.6.25\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.210\", \"versionStartIncluding\": \"2.6.25\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.176\", \"versionStartIncluding\": \"2.6.25\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.143\", \"versionStartIncluding\": \"2.6.25\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.12.94\", \"versionStartIncluding\": \"2.6.25\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.18.36\", \"versionStartIncluding\": \"2.6.25\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"7.0.13\", \"versionStartIncluding\": \"2.6.25\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"7.1\", \"versionStartIncluding\": \"2.6.25\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-08-05T12:34:17.928Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-53225\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-10-19T19:57:29.994Z\", \"dateReserved\": \"2026-06-09T07:44:35.392Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2026-06-25T08:39:25.911Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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