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CVE-2026-53225 (GCVE-0-2026-53225)

Vulnerability from cvelistv5 – Published: 2026-06-25 08:39 – Updated: 2026-08-05 12:34
VLAI
Title
sctp: fix uninit-value in __sctp_rcv_asconf_lookup()
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").
Severity
9.1 (Critical)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: df21857714398acb8b24a8bb5a6d2286dd9c59ef , < 446e0ecd845abc394b24ae2030a883572bec9d16 (git)
Affected: df21857714398acb8b24a8bb5a6d2286dd9c59ef , < 928dd94db23e8ba340f83d68f7f24d831b7a4426 (git)
Affected: df21857714398acb8b24a8bb5a6d2286dd9c59ef , < d796cfd06074b579d265b28401306cadd30db945 (git)
Affected: df21857714398acb8b24a8bb5a6d2286dd9c59ef , < 8ce96f1182644079249a24ac7e2ffc32e0301a46 (git)
Affected: df21857714398acb8b24a8bb5a6d2286dd9c59ef , < d6bd0bb7697ea8c0387b0d9d973453f479017b23 (git)
Affected: df21857714398acb8b24a8bb5a6d2286dd9c59ef , < f76a8b323e28e0951f979dbef20a7496383c47df (git)
Affected: df21857714398acb8b24a8bb5a6d2286dd9c59ef , < 8e86817b8af4d552f3c6fe04ca52bb0c8c57411d (git)
Affected: df21857714398acb8b24a8bb5a6d2286dd9c59ef , < f8373d7090b745728de66308deeecc67e8d319ce (git)
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Linux Linux Affected: 2.6.25
Unaffected: 0 , < 2.6.25 (semver)
Unaffected: 5.10.259 , ≤ 5.10.* (semver)
Unaffected: 5.15.210 , ≤ 5.15.* (semver)
Unaffected: 6.1.176 , ≤ 6.1.* (semver)
Unaffected: 6.6.143 , ≤ 6.6.* (semver)
Unaffected: 6.12.94 , ≤ 6.12.* (semver)
Unaffected: 6.18.36 , ≤ 6.18.* (semver)
Unaffected: 7.0.13 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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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 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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-05T14:32:40+00:00",
      "cve": "CVE-2026-53225",
      "id": "CVE-2026-53225",
      "initial_release_date": "2026-06-25T00:00:00+00:00",
      "product_status:known_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: sctp: fix uninit-value in __sctp_rcv_asconf_lookup()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53225.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "important",
      "current_release_date": "2026-09-10T16:56:51Z",
      "cve": "CVE-2026-53225",
      "id": "CVE-2026-53225",
      "initial_release_date": "2026-06-26T02:09:32Z",
      "product_status:first_fixed": "2",
      "product_status:known_affected": "649",
      "product_status:recommended": "273",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-53225",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-53225.json",
      "version": "16"
    }
  }
}



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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

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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.