{
  "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-2026-31515",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-31515",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-04-22T13:54:32.194Z",
    "updatedAt": "2026-10-15T01:16:49.668Z",
    "importedAt": "2026-10-24T01:58:02.025Z",
    "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": "af_key: validate families in pfkey_send_migrate()",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\naf_key: validate families in pfkey_send_migrate()\n\nsyzbot was able to trigger a crash in skb_put() [1]\n\nIssue is that pfkey_send_migrate() does not check old/new families,\nand that set_ipsecrequest() @family argument was truncated,\nthus possibly overfilling the skb.\n\nValidate families early, do not wait set_ipsecrequest().\n\n[1]\n\nskbuff: skb_over_panic: text:ffffffff8a752120 len:392 put:16 head:ffff88802a4ad040 data:ffff88802a4ad040 tail:0x188 end:0x180 dev:<NULL>\n kernel BUG at net/core/skbuff.c:214 !\nCall Trace:\n <TASK>\n  skb_over_panic net/core/skbuff.c:219 [inline]\n  skb_put+0x159/0x210 net/core/skbuff.c:2655\n  skb_put_zero include/linux/skbuff.h:2788 [inline]\n  set_ipsecrequest net/key/af_key.c:3532 [inline]\n  pfkey_send_migrate+0x1270/0x2e50 net/key/af_key.c:3636\n  km_migrate+0x155/0x260 net/xfrm/xfrm_state.c:2848\n  xfrm_migrate+0x2140/0x2450 net/xfrm/xfrm_policy.c:4705\n  xfrm_do_migrate+0x8ff/0xaa0 net/xfrm/xfrm_user.c:3150",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "08de61beab8a21c8e0b3906a97defda5f1f66ece",
              "status": "affected",
              "versionType": "git",
              "lessThan": "d0c5aa8dd38887714f1aad04236a3620b56a5e4e"
            },
            {
              "version": "08de61beab8a21c8e0b3906a97defda5f1f66ece",
              "status": "affected",
              "versionType": "git",
              "lessThan": "e06b596fc4eb01936a2e5dccad17c946d660bab8"
            },
            {
              "version": "08de61beab8a21c8e0b3906a97defda5f1f66ece",
              "status": "affected",
              "versionType": "git",
              "lessThan": "8ddf8de7e758f6888988467af9ffc8adf589fb16"
            },
            {
              "version": "08de61beab8a21c8e0b3906a97defda5f1f66ece",
              "status": "affected",
              "versionType": "git",
              "lessThan": "d3225e6b9bd51ec177970a628fe4b11237ce87d5"
            },
            {
              "version": "08de61beab8a21c8e0b3906a97defda5f1f66ece",
              "status": "affected",
              "versionType": "git",
              "lessThan": "7b18692c59afb8e5c364c8e3ac01e51dd6b52028"
            },
            {
              "version": "08de61beab8a21c8e0b3906a97defda5f1f66ece",
              "status": "affected",
              "versionType": "git",
              "lessThan": "83f644ea92987c100b82d8481ae2230faeed3d34"
            },
            {
              "version": "08de61beab8a21c8e0b3906a97defda5f1f66ece",
              "status": "affected",
              "versionType": "git",
              "lessThan": "ee836e820a40e2ca4da8af7310bff92d586772d4"
            },
            {
              "version": "08de61beab8a21c8e0b3906a97defda5f1f66ece",
              "status": "affected",
              "versionType": "git",
              "lessThan": "eb2d16a7d599dc9d4df391b5e660df9949963786"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "2.6.21",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "2.6.21"
            },
            {
              "version": "5.10.253",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.203",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.1.168",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.131",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.80",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.21",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "6.19.11",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.19.*"
            },
            {
              "version": "7.0",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}