{
  "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-2026-23199",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2026-23199",
    "idYear": 2026,
    "status": "PUBLISHED",
    "publishedAt": "2026-02-14T16:27:24.326Z",
    "updatedAt": "2026-05-11T22:02:14.489Z",
    "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": "procfs: avoid fetching build ID while holding VMA lock",
      "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nprocfs: avoid fetching build ID while holding VMA lock\n\nFix PROCMAP_QUERY to fetch optional build ID only after dropping mmap_lock\nor per-VMA lock, whichever was used to lock VMA under question, to avoid\ndeadlock reported by syzbot:\n\n -> #1 (&mm->mmap_lock){++++}-{4:4}:\n        __might_fault+0xed/0x170\n        _copy_to_iter+0x118/0x1720\n        copy_page_to_iter+0x12d/0x1e0\n        filemap_read+0x720/0x10a0\n        blkdev_read_iter+0x2b5/0x4e0\n        vfs_read+0x7f4/0xae0\n        ksys_read+0x12a/0x250\n        do_syscall_64+0xcb/0xf80\n        entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\n -> #0 (&sb->s_type->i_mutex_key#8){++++}-{4:4}:\n        __lock_acquire+0x1509/0x26d0\n        lock_acquire+0x185/0x340\n        down_read+0x98/0x490\n        blkdev_read_iter+0x2a7/0x4e0\n        __kernel_read+0x39a/0xa90\n        freader_fetch+0x1d5/0xa80\n        __build_id_parse.isra.0+0xea/0x6a0\n        do_procmap_query+0xd75/0x1050\n        procfs_procmap_ioctl+0x7a/0xb0\n        __x64_sys_ioctl+0x18e/0x210\n        do_syscall_64+0xcb/0xf80\n        entry_SYSCALL_64_after_hwframe+0x77/0x7f\n\n other info that might help us debug this:\n\n  Possible unsafe locking scenario:\n\n        CPU0                    CPU1\n        ----                    ----\n   rlock(&mm->mmap_lock);\n                                lock(&sb->s_type->i_mutex_key#8);\n                                lock(&mm->mmap_lock);\n   rlock(&sb->s_type->i_mutex_key#8);\n\n  *** DEADLOCK ***\n\nThis seems to be exacerbated (as we haven't seen these syzbot reports\nbefore that) by the recent:\n\n\t777a8560fd29 (\"lib/buildid: use __kernel_read() for sleepable context\")\n\nTo make this safe, we need to grab file refcount while VMA is still locked, but\nother than that everything is pretty straightforward. Internal build_id_parse()\nAPI assumes VMA is passed, but it only needs the underlying file reference, so\njust add another variant build_id_parse_file() that expects file passed\ndirectly.\n\n[akpm@linux-foundation.org: fix up kerneldoc]",
      "affected": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "ed5d583a88a9207b866c14ba834984c6f3c51d23",
              "status": "affected",
              "versionType": "git",
              "lessThan": "b9b97e6aeb534315f9646b2090d1a5024c6a4e82"
            },
            {
              "version": "ed5d583a88a9207b866c14ba834984c6f3c51d23",
              "status": "affected",
              "versionType": "git",
              "lessThan": "cbc03ce3e6ce7e21214c3f02218213574c1a2d08"
            },
            {
              "version": "ed5d583a88a9207b866c14ba834984c6f3c51d23",
              "status": "affected",
              "versionType": "git",
              "lessThan": "b5cbacd7f86f4f62b8813688c8e73be94e8e1951"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "6.11",
              "status": "affected"
            },
            {
              "version": "0",
              "status": "unaffected",
              "versionType": "semver",
              "lessThan": "6.11"
            },
            {
              "version": "6.12.70",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "version": "6.18.10",
              "status": "unaffected",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "version": "6.19",
              "status": "unaffected",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ]
        }
      ]
    }
  }
}