{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2026-90160",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-90160",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-09-17T16:06:51.806Z",
    "updatedAt": "2026-10-19T08:58:58.842Z",
    "importedAt": "2026-10-24T01:58:35.090Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "lwt_bpf: Restore reserved headroom after xmit program",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nlwt_bpf: Restore reserved headroom after xmit program\n\nip_finish_output2() expands an skb to LL_RESERVED_SPACE(dev) before LWT\nxmit. An LWT_XMIT BPF program can then modify the skb head and still\nreturn BPF_OK, so bpf_xmit() rechecks the remaining headroom before the\nskb continues to neighbour output.\n\nThat recheck uses dst->dev->hard_header_len. This is not enough for the\nneighbour cached-header path: neigh_hh_output() copies the cached hardware\nheader using the aligned hh_cache size, HH_DATA_MOD for short headers or\nHH_DATA_ALIGN(hh_len) otherwise.\n\nOn Ethernet, hard_header_len is 14 but the cached copy needs 16 bytes. If\nan LWT_XMIT BPF program calls bpf_skb_change_head(skb, 1, 0), the skb can\nstill have 15 bytes of headroom after the program. The existing check\naccepts that, after which neigh_hh_output() hits its headroom warning and\ndrops the skb.\n\nUse LL_RESERVED_SPACE(dst->dev) in the post-BPF headroom check to match\nthe reservation made before LWT xmit.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "3a0af8fd61f90920f6fa04e4f1e9a6a73c1b4fd2",
              "status": "affected",
              "versionType": "git",
              "lessThan": "753e5cdcca5474d230d62bb3489e5168ab27c272"
            },
            {
              "version": "3a0af8fd61f90920f6fa04e4f1e9a6a73c1b4fd2",
              "status": "affected",
              "versionType": "git",
              "lessThan": "c488071c3441fa34f5a87cd6c12ce2cc6304f20e"
            },
            {
              "version": "3a0af8fd61f90920f6fa04e4f1e9a6a73c1b4fd2",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a38c0eb447e2dd0120a2ebcdba470f9505ac8907"
            },
            {
              "version": "3a0af8fd61f90920f6fa04e4f1e9a6a73c1b4fd2",
              "status": "affected",
              "versionType": "git",
              "lessThan": "de2b2004e16f2930eb689175e2c1998b0a68d499"
            },
            {
              "version": "3a0af8fd61f90920f6fa04e4f1e9a6a73c1b4fd2",
              "status": "affected",
              "versionType": "git",
              "lessThan": "7d043e24520a273c362be5dd7d9c82796879a49b"
            },
            {
              "version": "3a0af8fd61f90920f6fa04e4f1e9a6a73c1b4fd2",
              "status": "affected",
              "versionType": "git",
              "lessThan": "7cf561843ed0ad57501892a65abb77957e6c800f"
            },
            {
              "version": "3a0af8fd61f90920f6fa04e4f1e9a6a73c1b4fd2",
              "status": "affected",
              "versionType": "git",
              "lessThan": "179a5b2171573d94a25c9aa8e1c9f9ac352ad316"
            },
            {
              "version": "3a0af8fd61f90920f6fa04e4f1e9a6a73c1b4fd2",
              "status": "affected",
              "versionType": "git",
              "lessThan": "5fe7007aed9ad069b2bd77e5d0c875c64f5c0269"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "4.10",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "4.10"
            },
            {
              "version": "5.10.270",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.221",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.188",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.157",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.110",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.52",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.2.6",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.*"
            },
            {
              "version": "7.3",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}