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sctp: validate stream count in sctp_process_strreset_inreq()

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: sctp: validate stream count in sctp_process_strreset_inreq() When processing a RESET_IN_REQUEST from a peer, sctp_process_strreset_inreq() derives the stream count from the parameter length but does not check whether the resulting RESET_OUT_REQUEST would exceed SCTP_MAX_CHUNK_LEN. The OUT request header (sctp_strreset_outreq, 16 bytes) is 8 bytes larger than the IN request header (sctp_strreset_inreq, 8 bytes). Generally, the IP payload is bounded to 65535 bytes, so the stream list cannot be large enough to trigger the overflow. However, on interfaces with MTU > 65535 (e.g., loopback with IPv6 jumbograms), a stream list that fits within the incoming IN parameter can cause a __u16 overflow in sctp_make_strreset_req() when computing the OUT request size, leading to an undersized skb allocation and a kernel BUG: net/core/skbuff.c:207 skb_panic net/core/skbuff.c:2625 skb_put net/sctp/sm_make_chunk.c:1535 sctp_addto_chunk net/sctp/sm_make_chunk.c:3695 sctp_make_strreset_req net/sctp/stream.c:655 sctp_process_strreset_inreq The local setsockopt path validates the generated reset request size. However, for an incoming-only reset, it accounts for the smaller IN request even though the peer must generate an OUT request with the same stream list. Such a request cannot be completed successfully by the peer. Reject peer IN requests whose corresponding OUT request would exceed SCTP_MAX_CHUNK_LEN. Also tighten the local ch

Announced Source revision 1
Original source ↗

CVE-2026-68315

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-2026-68315

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": "7f9d68ac944e24ee5f9ac8d059ca00b1c1d34137",
        "lessThan": "61327d8e7cfb0259d527be17202630f556213249",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "7f9d68ac944e24ee5f9ac8d059ca00b1c1d34137",
        "lessThan": "7cf7439948e3bf639119119922c88ec190874ca3",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "7f9d68ac944e24ee5f9ac8d059ca00b1c1d34137",
        "lessThan": "60c47dea5d320d2fc706e9aad1db38a04df0a056",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "7f9d68ac944e24ee5f9ac8d059ca00b1c1d34137",
        "lessThan": "b255d8cd6cc68045ae9eecbac3b3c14e1f176c9b",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "7f9d68ac944e24ee5f9ac8d059ca00b1c1d34137",
        "lessThan": "6f0e39d180cd7cced647381b6fa14fd83d261047",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "7f9d68ac944e24ee5f9ac8d059ca00b1c1d34137",
        "lessThan": "1a10fe1aa9c01f41b389a31906a77d538637c9d9",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "7f9d68ac944e24ee5f9ac8d059ca00b1c1d34137",
        "lessThan": "00ae679cb21a035491fdad8d58dc6d79cc68b675",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "7f9d68ac944e24ee5f9ac8d059ca00b1c1d34137",
        "lessThan": "18ae07691d43183d270de8be9dc8e027906015d9",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "net/sctp/stream.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "4.11"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "4.11",
        "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": [
      "net/sctp/stream.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-68315

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#41694 · Revision 1
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Publisher date
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