Skip to content
Heist/ feed
High

sctp: fix auth_hmacs array size in struct sctp_cookie

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: sctp: fix auth_hmacs array size in struct sctp_cookie The auth_hmacs array in struct sctp_cookie is supposed to store a complete SCTP_AUTH_HMAC_ALGO parameter, which consists of a struct sctp_paramhdr followed by N HMAC identifiers. However, the array size was calculated using an extra 2 bytes instead of sizeof(struct sctp_paramhdr), which is 4 bytes. When four HMAC identifiers are configured, the HMAC-ALGO parameter stored in the endpoint is larger than the auth_hmacs buffer in the cookie. As a result, sctp_association_init() copies beyond the end of auth_hmacs when initializing the association, corrupting the adjacent auth_chunks field. This can lead to an invalid HMAC identifier being accepted and later cause an out-of-bounds read in sctp_auth_get_hmac(). Fix the array size calculation by including the full SCTP parameter header size.

Announced Source revision 1
Original source ↗

CVE-2026-68376

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-68376

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "1f485649f52929d9937b346a920a522a7363e202",
        "lessThan": "317731d01b03c529809df36d3a7d149677a8729d",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "1f485649f52929d9937b346a920a522a7363e202",
        "lessThan": "0528485f27016a42804abe01aa61b39d85fa803e",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "1f485649f52929d9937b346a920a522a7363e202",
        "lessThan": "ee5e65964f456adfe14d526fba0bd055de98ecf3",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "1f485649f52929d9937b346a920a522a7363e202",
        "lessThan": "0b4414e43e0861d67276031cc21401d7e87de3da",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "1f485649f52929d9937b346a920a522a7363e202",
        "lessThan": "d0a59ba58578e2b330fff80a44fe519f3ba7d8c7",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "1f485649f52929d9937b346a920a522a7363e202",
        "lessThan": "a8d20ba0ab518c9ccbcde258f25fc1ee6e51d5db",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "1f485649f52929d9937b346a920a522a7363e202",
        "lessThan": "3aa40c3bccac2312ea7cf97f329190637f972b5d",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "1f485649f52929d9937b346a920a522a7363e202",
        "lessThan": "e0b5252a59383b77d1b8dbeda00b7184dd95f4d3",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "include/net/sctp/structs.h"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "2.6.24"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "2.6.24",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.265",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.216",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.183",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.148",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.101",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.42",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.1.6",
        "versionType": "semver",
        "lessThanOrEqual": "7.1.*"
      },
      {
        "status": "unaffected",
        "version": "7.2",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "include/net/sctp/structs.h"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-68376

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#41707 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement