{
  "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-2022-49871",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2022-49871",
    "idYear": 2022,
    "status": "PUBLISHED",
    "publishedAt": "2025-05-01T14:10:21.760Z",
    "updatedAt": "2026-05-11T19:08:21.371Z",
    "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": "net: tun: Fix memory leaks of napi_get_frags",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: tun: Fix memory leaks of napi_get_frags\n\nkmemleak reports after running test_progs:\n\nunreferenced object 0xffff8881b1672dc0 (size 232):\n  comm \"test_progs\", pid 394388, jiffies 4354712116 (age 841.975s)\n  hex dump (first 32 bytes):\n    e0 84 d7 a8 81 88 ff ff 80 2c 67 b1 81 88 ff ff  .........,g.....\n    00 40 c5 9b 81 88 ff ff 00 00 00 00 00 00 00 00  .@..............\n  backtrace:\n    [<00000000c8f01748>] napi_skb_cache_get+0xd4/0x150\n    [<0000000041c7fc09>] __napi_build_skb+0x15/0x50\n    [<00000000431c7079>] __napi_alloc_skb+0x26e/0x540\n    [<000000003ecfa30e>] napi_get_frags+0x59/0x140\n    [<0000000099b2199e>] tun_get_user+0x183d/0x3bb0 [tun]\n    [<000000008a5adef0>] tun_chr_write_iter+0xc0/0x1b1 [tun]\n    [<0000000049993ff4>] do_iter_readv_writev+0x19f/0x320\n    [<000000008f338ea2>] do_iter_write+0x135/0x630\n    [<000000008a3377a4>] vfs_writev+0x12e/0x440\n    [<00000000a6b5639a>] do_writev+0x104/0x280\n    [<00000000ccf065d8>] do_syscall_64+0x3b/0x90\n    [<00000000d776e329>] entry_SYSCALL_64_after_hwframe+0x63/0xcd\n\nThe issue occurs in the following scenarios:\ntun_get_user()\n  napi_gro_frags()\n    napi_frags_finish()\n      case GRO_NORMAL:\n        gro_normal_one()\n          list_add_tail(&skb->list, &napi->rx_list);\n          <-- While napi->rx_count < READ_ONCE(gro_normal_batch),\n          <-- gro_normal_list() is not called, napi->rx_list is not empty\n  <-- not ask to complete the gro work, will cause memory leaks in\n  <-- following tun_napi_del()\n...\ntun_napi_del()\n  netif_napi_del()\n    __netif_napi_del()\n    <-- &napi->rx_list is not empty, which caused memory leaks\n\nTo fix, add napi_complete() after napi_gro_frags().",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "90e33d45940793def6f773b2d528e9f3c84ffdc7",
              "status": "affected",
              "versionType": "git",
              "lessThan": "223ef6a94e52331a6a7ef31e59921e0e82d2d40a"
            },
            {
              "version": "90e33d45940793def6f773b2d528e9f3c84ffdc7",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a4f73f6adc53fd7a3f9771cbc89a03ef39b0b755"
            },
            {
              "version": "90e33d45940793def6f773b2d528e9f3c84ffdc7",
              "status": "affected",
              "versionType": "git",
              "lessThan": "3401f964028ac941425b9b2c8ff8a022539ef44a"
            },
            {
              "version": "90e33d45940793def6f773b2d528e9f3c84ffdc7",
              "status": "affected",
              "versionType": "git",
              "lessThan": "d7569302a7a52a9305d2fb054df908ff985553bb"
            },
            {
              "version": "90e33d45940793def6f773b2d528e9f3c84ffdc7",
              "status": "affected",
              "versionType": "git",
              "lessThan": "8b12a020b20a78f62bedc50f26db3bf4fadf8cb9"
            },
            {
              "version": "90e33d45940793def6f773b2d528e9f3c84ffdc7",
              "status": "affected",
              "versionType": "git",
              "lessThan": "1118b2049d77ca0b505775fc1a8d1909cf19a7ec"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "4.15",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "4.15"
            },
            {
              "version": "4.19.267",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "4.19.*"
            },
            {
              "version": "5.4.225",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.4.*"
            },
            {
              "version": "5.10.155",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.10.*"
            },
            {
              "version": "5.15.79",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "5.15.*"
            },
            {
              "version": "6.0.9",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.0.*"
            },
            {
              "version": "6.1",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}