{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "209d35ee34e25f9668c404350a1c86d914c54ffa"
            },
            {
              "fixed": "90c57310e266eb94e4a80d6b15a9ca131d2e82cb"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "8ef8a76a340ebdb2c2eea3f6fb0ebbed09a16383"
            },
            {
              "fixed": "5d29b286c9de0b309e94b9ed083aa1a2f429434f"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "cdef485217d30382f3bf6448c54b4401648fe3f1"
            },
            {
              "fixed": "354db6243eca59e9d187ffbf8b7955b044ce84dc"
            },
            {
              "fixed": "6d98c70fe0ba8c7708bfd5b2a5174d2086775daa"
            },
            {
              "fixed": "9bad152c42b37499162367fe47867411e62fffa3"
            },
            {
              "fixed": "dc3ab04220667f254f4348572b2a0b3febff89fb"
            },
            {
              "fixed": "a341c091ca0bfae377747b1b59a3bd8ebe18a937"
            },
            {
              "fixed": "6aea62e433fe1b586202a5fee8b5807ce635e1d7"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "ee38eb8cf9a7323884c2b8e0adbbeb2192d31e29"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "5.10.84"
            },
            {
              "fixed": "5.10.265"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "5.15.7"
            },
            {
              "fixed": "5.15.216"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        },
        {
          "events": [
            {
              "introduced": "5.4.164"
            },
            {
              "fixed": "5.5"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "5.10.265"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.216"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.183"
            },
            {
              "fixed": "6.6.151"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.12.103"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.18.44"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "7.1.8"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74581.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ipv6: clear suppressed fib6 rule result\n\nfib6_rule_suppress() drops a suppressed route with ip6_rt_put_flags(),\nbut leaves res-\u003ert6 pointing at the released rt6_info.\n\nIf no later rule supplies a replacement, fib6_rule_lookup() still sees\nres.rt6 and returns that stale dst to its caller. A suppressing rule can\ntherefore leak a released route back to rt6_lookup(), and the next put\nhits rcuref_put_slowpath() from dst_release().\n\nClear res-\u003ert6 when suppressing the route so suppressed lookups fall\nthrough to the null dst instead of reusing the released one.",
  "id": "CVE-2026-74581",
  "modified": "2026-08-27T11:31:00.184487302Z",
  "published": "2026-08-21T16:31:54.683Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/354db6243eca59e9d187ffbf8b7955b044ce84dc"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5d29b286c9de0b309e94b9ed083aa1a2f429434f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6aea62e433fe1b586202a5fee8b5807ce635e1d7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6d98c70fe0ba8c7708bfd5b2a5174d2086775daa"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/90c57310e266eb94e4a80d6b15a9ca131d2e82cb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/9bad152c42b37499162367fe47867411e62fffa3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a341c091ca0bfae377747b1b59a3bd8ebe18a937"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dc3ab04220667f254f4348572b2a0b3febff89fb"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74581.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74581"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "net: ipv6: clear suppressed fib6 rule result"
}