CVE-2026-99064

{
  "id": "CVE-2026-99064",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2026-10-23T13:17:30.253",
  "lastModified": "2026-10-24T14:16:54.507",
  "vulnStatus": "Received",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncipso: adjust cached option offsets when removing CIPSO\n\ncipso_v4_skbuff_delattr() removes the CIPSO bytes but does not adjust\ncached offsets for options that follow them.\n\nFor example, with a valid 10-byte CIPSO option followed by a seven-byte\nRR option, parsing records rr at offset 30.  Removing CIPSO moves RR to\noffset 20, while the cached offset remains 30.  Consumers such as\nip_forward_options() and __ip_options_echo() then access the wrong bytes;\nthe latter may interpret packet data as the option length and copy it into\nfixed-size option storage.\n\nMirror cipso_v4_delopt() and subtract cipso_len from the srr, rr, ts and\nrouter_alert offsets when they follow CIPSO.  cipso_len is the distance\nthe first memmove() shifts those options.  The later header move and\nnetwork-header reset relocate the bytes and their offset base together."
    }
  ],
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "programFiles": [
            "net/ipv4/cipso_ipv4.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "89aa3619d141d6cfb6040a561aebb6d99d3e2285",
              "lessThan": "b965977126a90e01825814c859ba4788691eddd3",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "89aa3619d141d6cfb6040a561aebb6d99d3e2285",
              "lessThan": "2200fe1d6148b78e1b8f00f4b2bd47760015077f",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "89aa3619d141d6cfb6040a561aebb6d99d3e2285",
              "lessThan": "6e49d611a9cfbaac927b8fa80ebd4f6b1f37ada0",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "89aa3619d141d6cfb6040a561aebb6d99d3e2285",
              "lessThan": "6d25ffca055a77787c21a36b66c253f76239411b",
              "versionType": "git",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "programFiles": [
            "net/ipv4/cipso_ipv4.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "6.10",
              "status": "affected"
            },
            {
              "version": "0",
              "lessThan": "6.10",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.12.113",
              "lessThanOrEqual": "6.12.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.18.57",
              "lessThanOrEqual": "6.18.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.2.11",
              "lessThanOrEqual": "7.2.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.3",
              "lessThanOrEqual": "*",
              "versionType": "original_commit_for_fix",
              "status": "unaffected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "baseScore": 8.1,
          "baseSeverity": "HIGH",
          "attackVector": "NETWORK",
          "attackComplexity": "HIGH",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 5.9
      }
    ]
  },
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/2200fe1d6148b78e1b8f00f4b2bd47760015077f",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/6d25ffca055a77787c21a36b66c253f76239411b",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/6e49d611a9cfbaac927b8fa80ebd4f6b1f37ada0",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/b965977126a90e01825814c859ba4788691eddd3",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ]
}