{
  "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-2022-49911",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2022-49911",
    "idYear": 2022,
    "status": "PUBLISHED",
    "publishedAt": "2025-05-01T14:10:53.631Z",
    "updatedAt": "2026-05-11T19:09:05.818Z",
    "importedAt": "2026-10-24T01:56:49.724Z",
    "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": "netfilter: ipset: enforce documented limit to prevent allocating huge memory",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: ipset: enforce documented limit to prevent allocating huge memory\n\nDaniel Xu reported that the hash:net,iface type of the ipset subsystem does\nnot limit adding the same network with different interfaces to a set, which\ncan lead to huge memory usage or allocation failure.\n\nThe quick reproducer is\n\n$ ipset create ACL.IN.ALL_PERMIT hash:net,iface hashsize 1048576 timeout 0\n$ for i in $(seq 0 100); do /sbin/ipset add ACL.IN.ALL_PERMIT 0.0.0.0/0,kaf_$i timeout 0 -exist; done\n\nThe backtrace when vmalloc fails:\n\n        [Tue Oct 25 00:13:08 2022] ipset: vmalloc error: size 1073741848, exceeds total pages\n        <...>\n        [Tue Oct 25 00:13:08 2022] Call Trace:\n        [Tue Oct 25 00:13:08 2022]  <TASK>\n        [Tue Oct 25 00:13:08 2022]  dump_stack_lvl+0x48/0x60\n        [Tue Oct 25 00:13:08 2022]  warn_alloc+0x155/0x180\n        [Tue Oct 25 00:13:08 2022]  __vmalloc_node_range+0x72a/0x760\n        [Tue Oct 25 00:13:08 2022]  ? hash_netiface4_add+0x7c0/0xb20\n        [Tue Oct 25 00:13:08 2022]  ? __kmalloc_large_node+0x4a/0x90\n        [Tue Oct 25 00:13:08 2022]  kvmalloc_node+0xa6/0xd0\n        [Tue Oct 25 00:13:08 2022]  ? hash_netiface4_resize+0x99/0x710\n        <...>\n\nThe fix is to enforce the limit documented in the ipset(8) manpage:\n\n>  The internal restriction of the hash:net,iface set type is that the same\n>  network prefix cannot be stored with more than 64 different interfaces\n>  in a single set.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "ccf0a4b7fc688561428290265e4effde41446668",
              "status": "affected",
              "versionType": "git",
              "lessThan": "42d20d5e24575c9afa2d66d9a51e7386db9514f5"
            },
            {
              "version": "ccf0a4b7fc688561428290265e4effde41446668",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a37ef32fe5956fe9248df68f6a61997845ba047e"
            },
            {
              "version": "ccf0a4b7fc688561428290265e4effde41446668",
              "status": "affected",
              "versionType": "git",
              "lessThan": "510841da1fcc16f702440ab58ef0b4d82a9056b7"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "5.11",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "5.11"
            },
            {
              "version": "5.15.78",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.0.8",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.0.*"
            },
            {
              "version": "6.1",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}