{
  "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-2026-74398",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-74398",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-08-15T05:59:10.113Z",
    "updatedAt": "2026-10-16T19:05:41.331Z",
    "importedAt": "2026-10-24T01:58:30.346Z",
    "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": "ipv6: addrconf: bail out of dad_failure when state is no longer POSTDAD",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: addrconf: bail out of dad_failure when state is no longer POSTDAD\n\naddrconf_dad_failure() transitions ifp->state from DAD to POSTDAD\nvia addrconf_dad_end(), which drops ifp->lock on return.  The lock\nis re-acquired after net_info_ratelimited().  A concurrent\nipv6_del_addr() can take the lock in that window, set ifp->state\nto DEAD and run list_del_rcu(&ifp->if_list).\n\naddrconf_dad_failure() then overwrites DEAD with ERRDAD at errdad:\nand schedules a new dad_work.  The work calls ipv6_del_addr()\nagain, hitting the already-poisoned list entry:\n\n  general protection fault: 0000 [#1] SMP NOPTI\n  CPU: 4 PID: 217 Comm: kworker/4:1\n  Workqueue: ipv6_addrconf addrconf_dad_work\n  RIP: 0010:ipv6_del_addr+0xe9/0x280\n  RAX: dead000000000122\n  Call Trace:\n   addrconf_dad_stop+0x113/0x140\n   addrconf_dad_work+0x28c/0x430\n   process_one_work+0x1eb/0x3b0\n   worker_thread+0x4d/0x400\n   kthread+0x104/0x140\n   ret_from_fork+0x35/0x40\n\nFold the addrconf_dad_end() logic into addrconf_dad_failure() under\na single ifp->lock critical section.  The STABLE_PRIVACY branch\ntemporarily drops ifp->lock around address regeneration, so at\nlock_errdad: verify the state is still POSTDAD before transitioning\nto ERRDAD; bail out otherwise to avoid overwriting a state set by\nanother path while the lock was released.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "c15b1ccadb323ea50023e8f1cca2954129a62b51",
              "status": "affected",
              "versionType": "git",
              "lessThan": "47b05836705b63dab93d9ac7c69a3a507375ef80"
            },
            {
              "version": "c15b1ccadb323ea50023e8f1cca2954129a62b51",
              "status": "affected",
              "versionType": "git",
              "lessThan": "d21be7d051012c6b572fa4e3334443c250216f7b"
            },
            {
              "version": "c15b1ccadb323ea50023e8f1cca2954129a62b51",
              "status": "affected",
              "versionType": "git",
              "lessThan": "875c284c0f98b042bb97abad460f63a24c977f88"
            },
            {
              "version": "c15b1ccadb323ea50023e8f1cca2954129a62b51",
              "status": "affected",
              "versionType": "git",
              "lessThan": "8ed0ce9ea58d677d1bac92614ee5f60f8ea57363"
            },
            {
              "version": "c15b1ccadb323ea50023e8f1cca2954129a62b51",
              "status": "affected",
              "versionType": "git",
              "lessThan": "3bdc86d89fd6c6523753fa6f42fcfaf30ee699cb"
            },
            {
              "version": "c15b1ccadb323ea50023e8f1cca2954129a62b51",
              "status": "affected",
              "versionType": "git",
              "lessThan": "b61af0268e3d1308c466bf0be5dced844eafc1ef"
            },
            {
              "version": "c15b1ccadb323ea50023e8f1cca2954129a62b51",
              "status": "affected",
              "versionType": "git",
              "lessThan": "e889aa99ad3ed48bb0ddcff6475b17542532d18b"
            },
            {
              "version": "c15b1ccadb323ea50023e8f1cca2954129a62b51",
              "status": "affected",
              "versionType": "git",
              "lessThan": "627ac78f2741e2ebd2225e2e953b6964a8a9182f"
            },
            {
              "version": "835b474b8f70fa68d68abffad37378e92f661802",
              "status": "affected",
              "versionType": "git"
            },
            {
              "version": "3.10.105",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "3.11"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "3.14",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "3.14"
            },
            {
              "version": "5.10.261",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.212",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.178",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.145",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.97",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.40",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.1.5",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.1.*"
            },
            {
              "version": "7.2",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}