FKIE_CVE-2026-80586

Vulnerability from fkie_nvd - Published: 2026-08-26 15:17 - Updated: 2026-08-26 15:17
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: mptcp: options: reset DSS fields in case of unexpected size A remote peer could send a malformed DSS with a wrong size, followed by another DSS or MPC + Data. In this case, the first suboption will be ignored, but leaving some fields written, which could lead to inconsistency or access uninitialized data. Explicitly reset the fields that could have been modified in case of unexpected size.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/15e35fdad7a5576bf3f1c8d688877aeb5d1b506b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/192878df582c51d440bf7b91a15f297f29f2b596
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1fade1b2ac5b1a4948e538fae7313bea57b5ac36
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/26dac5c9ffb20812b475fdf253eb04fab99cff3b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/27ed642a4e7e4b5df4b8522c72c457a67e052493
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/35772b4981f38ba8059372cde8753e8e477e98ec
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4e80eff5c1c893aca2ac1d202f0b256d2e52ecde
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b1256090816ec46011601e084be580731df58fc7
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/mptcp/options.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "15e35fdad7a5576bf3f1c8d688877aeb5d1b506b",
              "status": "affected",
              "version": "648ef4b88673dadb8463bf0d4b10fbf33d55def8",
              "versionType": "git"
            },
            {
              "lessThan": "b1256090816ec46011601e084be580731df58fc7",
              "status": "affected",
              "version": "648ef4b88673dadb8463bf0d4b10fbf33d55def8",
              "versionType": "git"
            },
            {
              "lessThan": "192878df582c51d440bf7b91a15f297f29f2b596",
              "status": "affected",
              "version": "648ef4b88673dadb8463bf0d4b10fbf33d55def8",
              "versionType": "git"
            },
            {
              "lessThan": "26dac5c9ffb20812b475fdf253eb04fab99cff3b",
              "status": "affected",
              "version": "648ef4b88673dadb8463bf0d4b10fbf33d55def8",
              "versionType": "git"
            },
            {
              "lessThan": "4e80eff5c1c893aca2ac1d202f0b256d2e52ecde",
              "status": "affected",
              "version": "648ef4b88673dadb8463bf0d4b10fbf33d55def8",
              "versionType": "git"
            },
            {
              "lessThan": "1fade1b2ac5b1a4948e538fae7313bea57b5ac36",
              "status": "affected",
              "version": "648ef4b88673dadb8463bf0d4b10fbf33d55def8",
              "versionType": "git"
            },
            {
              "lessThan": "27ed642a4e7e4b5df4b8522c72c457a67e052493",
              "status": "affected",
              "version": "648ef4b88673dadb8463bf0d4b10fbf33d55def8",
              "versionType": "git"
            },
            {
              "lessThan": "35772b4981f38ba8059372cde8753e8e477e98ec",
              "status": "affected",
              "version": "648ef4b88673dadb8463bf0d4b10fbf33d55def8",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/mptcp/options.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.6"
            },
            {
              "lessThan": "5.6",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.266",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.217",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.184",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.153",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.105",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.46",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmptcp: options: reset DSS fields in case of unexpected size\n\nA remote peer could send a malformed DSS with a wrong size, followed by\nanother DSS or MPC + Data. In this case, the first suboption will be\nignored, but leaving some fields written, which could lead to\ninconsistency or access uninitialized data.\n\nExplicitly reset the fields that could have been modified in case of\nunexpected size."
    }
  ],
  "id": "CVE-2026-80586",
  "lastModified": "2026-08-26T15:17:14.873",
  "metrics": {},
  "published": "2026-08-26T15:17:14.873",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/15e35fdad7a5576bf3f1c8d688877aeb5d1b506b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/192878df582c51d440bf7b91a15f297f29f2b596"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/1fade1b2ac5b1a4948e538fae7313bea57b5ac36"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/26dac5c9ffb20812b475fdf253eb04fab99cff3b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/27ed642a4e7e4b5df4b8522c72c457a67e052493"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/35772b4981f38ba8059372cde8753e8e477e98ec"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/4e80eff5c1c893aca2ac1d202f0b256d2e52ecde"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/b1256090816ec46011601e084be580731df58fc7"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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