{
  "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-2026-31434",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-31434",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-04-22T13:53:34.357Z",
    "updatedAt": "2026-05-23T16:05:03.539Z",
    "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": "btrfs: fix leak of kobject name for sub-group space_info",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: fix leak of kobject name for sub-group space_info\n\nWhen create_space_info_sub_group() allocates elements of\nspace_info->sub_group[], kobject_init_and_add() is called for each\nelement via btrfs_sysfs_add_space_info_type(). However, when\ncheck_removing_space_info() frees these elements, it does not call\nbtrfs_sysfs_remove_space_info() on them. As a result, kobject_put() is\nnot called and the associated kobj->name objects are leaked.\n\nThis memory leak is reproduced by running the blktests test case\nzbd/009 on kernels built with CONFIG_DEBUG_KMEMLEAK. The kmemleak\nfeature reports the following error:\n\nunreferenced object 0xffff888112877d40 (size 16):\n  comm \"mount\", pid 1244, jiffies 4294996972\n  hex dump (first 16 bytes):\n    64 61 74 61 2d 72 65 6c 6f 63 00 c4 c6 a7 cb 7f  data-reloc......\n  backtrace (crc 53ffde4d):\n    __kmalloc_node_track_caller_noprof+0x619/0x870\n    kstrdup+0x42/0xc0\n    kobject_set_name_vargs+0x44/0x110\n    kobject_init_and_add+0xcf/0x150\n    btrfs_sysfs_add_space_info_type+0xfc/0x210 [btrfs]\n    create_space_info_sub_group.constprop.0+0xfb/0x1b0 [btrfs]\n    create_space_info+0x211/0x320 [btrfs]\n    btrfs_init_space_info+0x15a/0x1b0 [btrfs]\n    open_ctree+0x33c7/0x4a50 [btrfs]\n    btrfs_get_tree.cold+0x9f/0x1ee [btrfs]\n    vfs_get_tree+0x87/0x2f0\n    vfs_cmd_create+0xbd/0x280\n    __do_sys_fsconfig+0x3df/0x990\n    do_syscall_64+0x136/0x1540\n    entry_SYSCALL_64_after_hwframe+0x76/0x7e\n\nTo avoid the leak, call btrfs_sysfs_remove_space_info() instead of\nkfree() for the elements.",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "64c7ddda83acfbaa0efb381a1928ce908c584607",
              "status": "affected",
              "versionType": "git",
              "lessThan": "416484f21a9d1280cf6daa7ebc10c79b59c46e48"
            },
            {
              "version": "0bd151ce4200ca847990e05cca29a76456982ca5",
              "status": "affected",
              "versionType": "git",
              "lessThan": "94054ffd311a1f76b7093ba8ebf50bdb0d28337c"
            },
            {
              "version": "190d5a7c4fe42b8c9aa46e3336389e7cb10395bb",
              "status": "affected",
              "versionType": "git",
              "lessThan": "1737ddeafbb1304f41ec2eede4f7366082e7c96a"
            },
            {
              "version": "f92ee31e031c7819126d2febdda0c3e91f5d2eb9",
              "status": "affected",
              "versionType": "git",
              "lessThan": "3c844d01f9874a43004c82970d8da94f9aba8949"
            },
            {
              "version": "f92ee31e031c7819126d2febdda0c3e91f5d2eb9",
              "status": "affected",
              "versionType": "git",
              "lessThan": "3c645c6f7e5470debbb81666b230056de48f36dc"
            },
            {
              "version": "f92ee31e031c7819126d2febdda0c3e91f5d2eb9",
              "status": "affected",
              "versionType": "git",
              "lessThan": "a4376d9a5d4c9610e69def3fc0b32c86a7ab7a41"
            },
            {
              "version": "6.1.162",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.1.168"
            },
            {
              "version": "6.6.122",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.6.131"
            },
            {
              "version": "6.12.67",
              "status": "affected",
              "versionType": "semver",
              "lessThan": "6.12.80"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "6.16",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "6.16"
            },
            {
              "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": "*"
            }
          ]
        }
      ]
    }
  }
}