{
  "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-2026-68386",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-68386",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-08-10T12:04:05.306Z",
    "updatedAt": "2026-08-19T16:34:40.363Z",
    "importedAt": "2026-10-24T01:58:25.636Z",
    "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": "bpf, sockmap: Reject unhashed UDP sockets on sockmap update",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf, sockmap: Reject unhashed UDP sockets on sockmap update\n\nUDP sockets get SOCK_RCU_FREE set when (auto-)bound. This means\nsk_is_refcounted(unbound) = true, while sk_is_refcounted(bound) = false.\n\nBecause sockmap accepts unbound UDP sockets, a BPF program can increment a\nsocket's refcount via lookup. If the socket is subsequently bound, the\ntransition from unbound to bound causes bpf_sk_release() to skip the\ndecrement of the refcount, causing a memory leak.\n\nunreferenced object 0xffff88810bc2eb40 (size 1984):\n  comm \"test_progs\", pid 2451, jiffies 4295320596\n  hex dump (first 32 bytes):\n    7f 00 00 01 7f 00 00 01 d2 04 1b b7 04 d2 00 00  ................\n    02 00 01 40 00 00 00 00 00 00 00 00 00 00 00 00  ...@............\n  backtrace (crc bdee079d):\n    kmem_cache_alloc_noprof+0x557/0x660\n    sk_prot_alloc+0x69/0x240\n    sk_alloc+0x30/0x460\n    inet_create+0x2ce/0xf80\n    __sock_create+0x25b/0x5c0\n    __sys_socket+0x119/0x1d0\n    __x64_sys_socket+0x72/0xd0\n    do_syscall_64+0xa1/0x5f0\n    entry_SYSCALL_64_after_hwframe+0x76/0x7e\n\nInstead of special-casing for refcounted sockets, reject unhashed UDP\nsockets during sockmap updates, as there is no benefit to supporting those.\nThis effectively reverts the commit under Fixes, with two exceptions:\n\n1. sock_map_sk_state_allowed() maintains a fall-through `return true`.\n2. In the spirit of commit b8b8315e39ff (\"bpf, sockmap: Remove unhash\n   handler for BPF sockmap usage\"), the proto::unhash BPF handler is not\n   reintroduced.\n\nHistorical note: this issue is related to commit 67312adc96b5 (\"bpf: reject\nunhashed sockets in bpf_sk_assign\").",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "0c48eefae712c2fd91480346a07a1a9cd0f9470b",
              "status": "affected",
              "versionType": "git",
              "lessThan": "2271276ac5279d2d204be7739a1a28d4ef6cf608"
            },
            {
              "version": "0c48eefae712c2fd91480346a07a1a9cd0f9470b",
              "status": "affected",
              "versionType": "git",
              "lessThan": "7ffe529e7127411806c8692fb1490f552c629dc2"
            },
            {
              "version": "0c48eefae712c2fd91480346a07a1a9cd0f9470b",
              "status": "affected",
              "versionType": "git",
              "lessThan": "17b7ef6b86112a4e61cee1e9009a4b318e3225c5"
            },
            {
              "version": "0c48eefae712c2fd91480346a07a1a9cd0f9470b",
              "status": "affected",
              "versionType": "git",
              "lessThan": "250474c69bc3fc48a5fc21d7c349f279caad947a"
            },
            {
              "version": "0c48eefae712c2fd91480346a07a1a9cd0f9470b",
              "status": "affected",
              "versionType": "git",
              "lessThan": "8692655da369961128658cf8539334b6a960ecb0"
            },
            {
              "version": "0c48eefae712c2fd91480346a07a1a9cd0f9470b",
              "status": "affected",
              "versionType": "git",
              "lessThan": "66efd3368ae10d05e08fbe6425b50fdec7186ac7"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "5.15",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "5.15"
            },
            {
              "version": "6.1.183",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.1.*"
            },
            {
              "version": "6.6.148",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "version": "6.12.101",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.42",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "7.1.6",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "7.1.*"
            },
            {
              "version": "7.2",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}