{
  "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-2026-90393",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-90393",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-09-17T16:09:26.388Z",
    "updatedAt": "2026-10-19T09:02:57.658Z",
    "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": "bpf: Fix potential UAF in bpf_netns_link_update_prog",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix potential UAF in bpf_netns_link_update_prog\n\nIn bpf_netns_link_update_prog, the checks for old_prog and prog type\nare currently performed locklessly before acquiring netns_bpf_mutex.\nThis creates a race condition that can lead to a UAF issue.\n\nIf two threads concurrently execute BPF_LINK_UPDATE on the same netns\nlink, the following execution path can trigger a UAF:\n\nCPU0                                          CPU1\nbpf_netns_link_update_prog\n  if (old_prog && old_prog != link->prog)\n    return -EPERM;\n                                              bpf_netns_link_update_prog\n                                                if (old_prog && old_prog != link->prog)\n                                                ...\n                                                old_prog = xchg(&link->prog, new_prog);\n                                                bpf_prog_put(old_prog);\n  if (new_prog->type != link->prog->type) <-- trigger UAF\n\nFix this by moving the old_prog and prog->type checks inside the\nnetns_bpf_mutex critical section. Meanwhile, use guard() to simplify\nlock management and avoid all the goto jumping.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "7f045a49fee04b5662cbdeaf0838f9322ae8c63a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "d462b5481d77ce7df8a5ff89a699386f00c9214d"
            },
            {
              "version": "7f045a49fee04b5662cbdeaf0838f9322ae8c63a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "bdddf3e1493ee973619c154a57071ce67f78598b"
            },
            {
              "version": "7f045a49fee04b5662cbdeaf0838f9322ae8c63a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "79a66fd997d4eecf17302d613194879eb32e0986"
            },
            {
              "version": "7f045a49fee04b5662cbdeaf0838f9322ae8c63a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "f4ce6803df4095777191d800bebc50219b615ca0"
            },
            {
              "version": "7f045a49fee04b5662cbdeaf0838f9322ae8c63a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "277168cb9d153ce8e9c3f9275670e32ae61b41d6"
            },
            {
              "version": "7f045a49fee04b5662cbdeaf0838f9322ae8c63a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "bda86e9f31b9a296b6e64a51c91dc776fc9f613e"
            },
            {
              "version": "7f045a49fee04b5662cbdeaf0838f9322ae8c63a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "923f559e95b89b33c7e1793b3d8f7f4ec9b2e4b7"
            },
            {
              "version": "7f045a49fee04b5662cbdeaf0838f9322ae8c63a",
              "status": "affected",
              "versionType": "git",
              "lessThan": "5c5997836381010fc5907b36bc17d3b19407e933"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "5.8",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "5.8"
            },
            {
              "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": "*"
            }
          ]
        }
      ]
    }
  }
}