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CVE-2026-23018 (GCVE-0-2026-23018)

Vulnerability from cvelistv5 – Published: 2026-01-31 11:39 – Updated: 2026-05-23 16:03
VLAI
Title
btrfs: release path before initializing extent tree in btrfs_read_locked_inode()
Summary
In the Linux kernel, the following vulnerability has been resolved: btrfs: release path before initializing extent tree in btrfs_read_locked_inode() In btrfs_read_locked_inode() we are calling btrfs_init_file_extent_tree() while holding a path with a read locked leaf from a subvolume tree, and btrfs_init_file_extent_tree() may do a GFP_KERNEL allocation, which can trigger reclaim. This can create a circular lock dependency which lockdep warns about with the following splat: [6.1433] ====================================================== [6.1574] WARNING: possible circular locking dependency detected [6.1583] 6.18.0+ #4 Tainted: G U [6.1591] ------------------------------------------------------ [6.1599] kswapd0/117 is trying to acquire lock: [6.1606] ffff8d9b6333c5b8 (&delayed_node->mutex){+.+.}-{3:3}, at: __btrfs_release_delayed_node.part.0+0x39/0x2f0 [6.1625] but task is already holding lock: [6.1633] ffffffffa4ab8ce0 (fs_reclaim){+.+.}-{0:0}, at: balance_pgdat+0x195/0xc60 [6.1646] which lock already depends on the new lock. [6.1657] the existing dependency chain (in reverse order) is: [6.1667] -> #2 (fs_reclaim){+.+.}-{0:0}: [6.1677] fs_reclaim_acquire+0x9d/0xd0 [6.1685] __kmalloc_cache_noprof+0x59/0x750 [6.1694] btrfs_init_file_extent_tree+0x90/0x100 [6.1702] btrfs_read_locked_inode+0xc3/0x6b0 [6.1710] btrfs_iget+0xbb/0xf0 [6.1716] btrfs_lookup_dentry+0x3c5/0x8e0 [6.1724] btrfs_lookup+0x12/0x30 [6.1731] lookup_open.isra.0+0x1aa/0x6a0 [6.1739] path_openat+0x5f7/0xc60 [6.1746] do_filp_open+0xd6/0x180 [6.1753] do_sys_openat2+0x8b/0xe0 [6.1760] __x64_sys_openat+0x54/0xa0 [6.1768] do_syscall_64+0x97/0x3e0 [6.1776] entry_SYSCALL_64_after_hwframe+0x76/0x7e [6.1784] -> #1 (btrfs-tree-00){++++}-{3:3}: [6.1794] lock_release+0x127/0x2a0 [6.1801] up_read+0x1b/0x30 [6.1808] btrfs_search_slot+0x8e0/0xff0 [6.1817] btrfs_lookup_inode+0x52/0xd0 [6.1825] __btrfs_update_delayed_inode+0x73/0x520 [6.1833] btrfs_commit_inode_delayed_inode+0x11a/0x120 [6.1842] btrfs_log_inode+0x608/0x1aa0 [6.1849] btrfs_log_inode_parent+0x249/0xf80 [6.1857] btrfs_log_dentry_safe+0x3e/0x60 [6.1865] btrfs_sync_file+0x431/0x690 [6.1872] do_fsync+0x39/0x80 [6.1879] __x64_sys_fsync+0x13/0x20 [6.1887] do_syscall_64+0x97/0x3e0 [6.1894] entry_SYSCALL_64_after_hwframe+0x76/0x7e [6.1903] -> #0 (&delayed_node->mutex){+.+.}-{3:3}: [6.1913] __lock_acquire+0x15e9/0x2820 [6.1920] lock_acquire+0xc9/0x2d0 [6.1927] __mutex_lock+0xcc/0x10a0 [6.1934] __btrfs_release_delayed_node.part.0+0x39/0x2f0 [6.1944] btrfs_evict_inode+0x20b/0x4b0 [6.1952] evict+0x15a/0x2f0 [6.1958] prune_icache_sb+0x91/0xd0 [6.1966] super_cache_scan+0x150/0x1d0 [6.1974] do_shrink_slab+0x155/0x6f0 [6.1981] shrink_slab+0x48e/0x890 [6.1988] shrink_one+0x11a/0x1f0 [6.1995] shrink_node+0xbfd/0x1320 [6.1002] balance_pgdat+0x67f/0xc60 [6.1321] kswapd+0x1dc/0x3e0 [6.1643] kthread+0xff/0x240 [6.1965] ret_from_fork+0x223/0x280 [6.1287] ret_from_fork_asm+0x1a/0x30 [6.1616] other info that might help us debug this: [6.1561] Chain exists of: &delayed_node->mutex --> btrfs-tree-00 --> fs_reclaim [6.1503] Possible unsafe locking scenario: [6.1110] CPU0 CPU1 [6.1411] ---- ---- [6.1707] lock(fs_reclaim); [6.1998] lock(btrfs-tree-00); [6.1291] lock(fs_reclaim); [6.1581] lock(&del ---truncated---
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 8679d2687c351824d08cf1f0e86f3b65f22a00fe , < 92a5590851144f034adc51fee55e6878ccac716e (git)
Affected: 8679d2687c351824d08cf1f0e86f3b65f22a00fe , < 8731f2c50b0b1d2b58ed5b9671ef2c4bdc2f8347 (git)
Affected: e8f496001e0c7832d188ab91fea294e19a128202 (git)
Affected: 6.16.9 , < 6.17 (semver)
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Linux Linux Affected: 6.17
Unaffected: 0 , < 6.17 (semver)
Unaffected: 6.18.6 , ≤ 6.18.* (semver)
Unaffected: 6.19 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/btrfs/inode.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "92a5590851144f034adc51fee55e6878ccac716e",
              "status": "affected",
              "version": "8679d2687c351824d08cf1f0e86f3b65f22a00fe",
              "versionType": "git"
            },
            {
              "lessThan": "8731f2c50b0b1d2b58ed5b9671ef2c4bdc2f8347",
              "status": "affected",
              "version": "8679d2687c351824d08cf1f0e86f3b65f22a00fe",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "e8f496001e0c7832d188ab91fea294e19a128202",
              "versionType": "git"
            },
            {
              "lessThan": "6.17",
              "status": "affected",
              "version": "6.16.9",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/btrfs/inode.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.17"
            },
            {
              "lessThan": "6.17",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.19",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.6",
                  "versionStartIncluding": "6.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19",
                  "versionStartIncluding": "6.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "6.16.9",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: release path before initializing extent tree in btrfs_read_locked_inode()\n\nIn btrfs_read_locked_inode() we are calling btrfs_init_file_extent_tree()\nwhile holding a path with a read locked leaf from a subvolume tree, and\nbtrfs_init_file_extent_tree() may do a GFP_KERNEL allocation, which can\ntrigger reclaim.\n\nThis can create a circular lock dependency which lockdep warns about with\nthe following splat:\n\n   [6.1433] ======================================================\n   [6.1574] WARNING: possible circular locking dependency detected\n   [6.1583] 6.18.0+ #4 Tainted: G     U\n   [6.1591] ------------------------------------------------------\n   [6.1599] kswapd0/117 is trying to acquire lock:\n   [6.1606] ffff8d9b6333c5b8 (\u0026delayed_node-\u003emutex){+.+.}-{3:3}, at: __btrfs_release_delayed_node.part.0+0x39/0x2f0\n   [6.1625]\n            but task is already holding lock:\n   [6.1633] ffffffffa4ab8ce0 (fs_reclaim){+.+.}-{0:0}, at: balance_pgdat+0x195/0xc60\n   [6.1646]\n            which lock already depends on the new lock.\n\n   [6.1657]\n            the existing dependency chain (in reverse order) is:\n   [6.1667]\n            -\u003e #2 (fs_reclaim){+.+.}-{0:0}:\n   [6.1677]        fs_reclaim_acquire+0x9d/0xd0\n   [6.1685]        __kmalloc_cache_noprof+0x59/0x750\n   [6.1694]        btrfs_init_file_extent_tree+0x90/0x100\n   [6.1702]        btrfs_read_locked_inode+0xc3/0x6b0\n   [6.1710]        btrfs_iget+0xbb/0xf0\n   [6.1716]        btrfs_lookup_dentry+0x3c5/0x8e0\n   [6.1724]        btrfs_lookup+0x12/0x30\n   [6.1731]        lookup_open.isra.0+0x1aa/0x6a0\n   [6.1739]        path_openat+0x5f7/0xc60\n   [6.1746]        do_filp_open+0xd6/0x180\n   [6.1753]        do_sys_openat2+0x8b/0xe0\n   [6.1760]        __x64_sys_openat+0x54/0xa0\n   [6.1768]        do_syscall_64+0x97/0x3e0\n   [6.1776]        entry_SYSCALL_64_after_hwframe+0x76/0x7e\n   [6.1784]\n            -\u003e #1 (btrfs-tree-00){++++}-{3:3}:\n   [6.1794]        lock_release+0x127/0x2a0\n   [6.1801]        up_read+0x1b/0x30\n   [6.1808]        btrfs_search_slot+0x8e0/0xff0\n   [6.1817]        btrfs_lookup_inode+0x52/0xd0\n   [6.1825]        __btrfs_update_delayed_inode+0x73/0x520\n   [6.1833]        btrfs_commit_inode_delayed_inode+0x11a/0x120\n   [6.1842]        btrfs_log_inode+0x608/0x1aa0\n   [6.1849]        btrfs_log_inode_parent+0x249/0xf80\n   [6.1857]        btrfs_log_dentry_safe+0x3e/0x60\n   [6.1865]        btrfs_sync_file+0x431/0x690\n   [6.1872]        do_fsync+0x39/0x80\n   [6.1879]        __x64_sys_fsync+0x13/0x20\n   [6.1887]        do_syscall_64+0x97/0x3e0\n   [6.1894]        entry_SYSCALL_64_after_hwframe+0x76/0x7e\n   [6.1903]\n            -\u003e #0 (\u0026delayed_node-\u003emutex){+.+.}-{3:3}:\n   [6.1913]        __lock_acquire+0x15e9/0x2820\n   [6.1920]        lock_acquire+0xc9/0x2d0\n   [6.1927]        __mutex_lock+0xcc/0x10a0\n   [6.1934]        __btrfs_release_delayed_node.part.0+0x39/0x2f0\n   [6.1944]        btrfs_evict_inode+0x20b/0x4b0\n   [6.1952]        evict+0x15a/0x2f0\n   [6.1958]        prune_icache_sb+0x91/0xd0\n   [6.1966]        super_cache_scan+0x150/0x1d0\n   [6.1974]        do_shrink_slab+0x155/0x6f0\n   [6.1981]        shrink_slab+0x48e/0x890\n   [6.1988]        shrink_one+0x11a/0x1f0\n   [6.1995]        shrink_node+0xbfd/0x1320\n   [6.1002]        balance_pgdat+0x67f/0xc60\n   [6.1321]        kswapd+0x1dc/0x3e0\n   [6.1643]        kthread+0xff/0x240\n   [6.1965]        ret_from_fork+0x223/0x280\n   [6.1287]        ret_from_fork_asm+0x1a/0x30\n   [6.1616]\n            other info that might help us debug this:\n\n   [6.1561] Chain exists of:\n              \u0026delayed_node-\u003emutex --\u003e btrfs-tree-00 --\u003e fs_reclaim\n\n   [6.1503]  Possible unsafe locking scenario:\n\n   [6.1110]        CPU0                    CPU1\n   [6.1411]        ----                    ----\n   [6.1707]   lock(fs_reclaim);\n   [6.1998]                                lock(btrfs-tree-00);\n   [6.1291]                                lock(fs_reclaim);\n   [6.1581]   lock(\u0026del\n---truncated---"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-23T16:03:42.961Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/92a5590851144f034adc51fee55e6878ccac716e"
        },
        {
          "url": "https://git.kernel.org/stable/c/8731f2c50b0b1d2b58ed5b9671ef2c4bdc2f8347"
        }
      ],
      "title": "btrfs: release path before initializing extent tree in btrfs_read_locked_inode()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-23018",
    "datePublished": "2026-01-31T11:39:02.330Z",
    "dateReserved": "2026-01-13T15:37:45.940Z",
    "dateUpdated": "2026-05-23T16:03:42.961Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-23018",
      "date": "2026-09-16",
      "epss": "0.00104",
      "percentile": "0.01163"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-23018\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-01-31T12:16:05.100\",\"lastModified\":\"2026-06-17T10:20:43.223\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nbtrfs: release path before initializing extent tree in btrfs_read_locked_inode()\\n\\nIn btrfs_read_locked_inode() we are calling btrfs_init_file_extent_tree()\\nwhile holding a path with a read locked leaf from a subvolume tree, and\\nbtrfs_init_file_extent_tree() may do a GFP_KERNEL allocation, which can\\ntrigger reclaim.\\n\\nThis can create a circular lock dependency which lockdep warns about with\\nthe following splat:\\n\\n   [6.1433] ======================================================\\n   [6.1574] WARNING: possible circular locking dependency detected\\n   [6.1583] 6.18.0+ #4 Tainted: G     U\\n   [6.1591] ------------------------------------------------------\\n   [6.1599] kswapd0/117 is trying to acquire lock:\\n   [6.1606] ffff8d9b6333c5b8 (\u0026delayed_node-\u003emutex){+.+.}-{3:3}, at: __btrfs_release_delayed_node.part.0+0x39/0x2f0\\n   [6.1625]\\n            but task is already holding lock:\\n   [6.1633] ffffffffa4ab8ce0 (fs_reclaim){+.+.}-{0:0}, at: balance_pgdat+0x195/0xc60\\n   [6.1646]\\n            which lock already depends on the new lock.\\n\\n   [6.1657]\\n            the existing dependency chain (in reverse order) is:\\n   [6.1667]\\n            -\u003e #2 (fs_reclaim){+.+.}-{0:0}:\\n   [6.1677]        fs_reclaim_acquire+0x9d/0xd0\\n   [6.1685]        __kmalloc_cache_noprof+0x59/0x750\\n   [6.1694]        btrfs_init_file_extent_tree+0x90/0x100\\n   [6.1702]        btrfs_read_locked_inode+0xc3/0x6b0\\n   [6.1710]        btrfs_iget+0xbb/0xf0\\n   [6.1716]        btrfs_lookup_dentry+0x3c5/0x8e0\\n   [6.1724]        btrfs_lookup+0x12/0x30\\n   [6.1731]        lookup_open.isra.0+0x1aa/0x6a0\\n   [6.1739]        path_openat+0x5f7/0xc60\\n   [6.1746]        do_filp_open+0xd6/0x180\\n   [6.1753]        do_sys_openat2+0x8b/0xe0\\n   [6.1760]        __x64_sys_openat+0x54/0xa0\\n   [6.1768]        do_syscall_64+0x97/0x3e0\\n   [6.1776]        entry_SYSCALL_64_after_hwframe+0x76/0x7e\\n   [6.1784]\\n            -\u003e #1 (btrfs-tree-00){++++}-{3:3}:\\n   [6.1794]        lock_release+0x127/0x2a0\\n   [6.1801]        up_read+0x1b/0x30\\n   [6.1808]        btrfs_search_slot+0x8e0/0xff0\\n   [6.1817]        btrfs_lookup_inode+0x52/0xd0\\n   [6.1825]        __btrfs_update_delayed_inode+0x73/0x520\\n   [6.1833]        btrfs_commit_inode_delayed_inode+0x11a/0x120\\n   [6.1842]        btrfs_log_inode+0x608/0x1aa0\\n   [6.1849]        btrfs_log_inode_parent+0x249/0xf80\\n   [6.1857]        btrfs_log_dentry_safe+0x3e/0x60\\n   [6.1865]        btrfs_sync_file+0x431/0x690\\n   [6.1872]        do_fsync+0x39/0x80\\n   [6.1879]        __x64_sys_fsync+0x13/0x20\\n   [6.1887]        do_syscall_64+0x97/0x3e0\\n   [6.1894]        entry_SYSCALL_64_after_hwframe+0x76/0x7e\\n   [6.1903]\\n            -\u003e #0 (\u0026delayed_node-\u003emutex){+.+.}-{3:3}:\\n   [6.1913]        __lock_acquire+0x15e9/0x2820\\n   [6.1920]        lock_acquire+0xc9/0x2d0\\n   [6.1927]        __mutex_lock+0xcc/0x10a0\\n   [6.1934]        __btrfs_release_delayed_node.part.0+0x39/0x2f0\\n   [6.1944]        btrfs_evict_inode+0x20b/0x4b0\\n   [6.1952]        evict+0x15a/0x2f0\\n   [6.1958]        prune_icache_sb+0x91/0xd0\\n   [6.1966]        super_cache_scan+0x150/0x1d0\\n   [6.1974]        do_shrink_slab+0x155/0x6f0\\n   [6.1981]        shrink_slab+0x48e/0x890\\n   [6.1988]        shrink_one+0x11a/0x1f0\\n   [6.1995]        shrink_node+0xbfd/0x1320\\n   [6.1002]        balance_pgdat+0x67f/0xc60\\n   [6.1321]        kswapd+0x1dc/0x3e0\\n   [6.1643]        kthread+0xff/0x240\\n   [6.1965]        ret_from_fork+0x223/0x280\\n   [6.1287]        ret_from_fork_asm+0x1a/0x30\\n   [6.1616]\\n            other info that might help us debug this:\\n\\n   [6.1561] Chain exists of:\\n              \u0026delayed_node-\u003emutex --\u003e btrfs-tree-00 --\u003e fs_reclaim\\n\\n   [6.1503]  Possible unsafe locking scenario:\\n\\n   [6.1110]        CPU0                    CPU1\\n   [6.1411]        ----                    ----\\n   [6.1707]   lock(fs_reclaim);\\n   [6.1998]                                lock(btrfs-tree-00);\\n   [6.1291]                                lock(fs_reclaim);\\n   [6.1581]   lock(\u0026del\\n---truncated---\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:  btrfs: liberar ruta antes de inicializar el \u00e1rbol de extensiones en btrfs_read_locked_inode()  En btrfs_read_locked_inode() estamos llamando a btrfs_init_file_extent_tree() mientras mantenemos una ruta con una hoja bloqueada para lectura de un \u00e1rbol de subvolumen, y btrfs_init_file_extent_tree() puede realizar una asignaci\u00f3n GFP_KERNEL, lo que puede activar la recuperaci\u00f3n.  Esto puede crear una dependencia de bloqueo circular sobre la cual lockdep advierte con el siguiente splat:     [6.1433] [6.1574] WARNING: posible dependencia de bloqueo circular detectada    [6.1583] 6.18.0+ #4 Tainted: G     U    [6.1591] [6.1599] kswapd0/117 est\u00e1 intentando adquirir el bloqueo:    [6.1606] ffff8d9b6333c5b8 (\u0026amp;delayed_node-\u0026gt;mutex){+.+.}-{3:3}, en: __btrfs_release_delayed_node.part.0+0x39/0x2f0 [6.1625] pero la tarea ya est\u00e1 manteniendo el bloqueo: [6.1633] ffffffffa4ab8ce0 (fs_reclaim){+.+.}-{0:0}, en: balance_pgdat+0x195/0xc60    [6.1646] cuyo bloqueo ya depende del nuevo bloqueo. [6.1657] la cadena de dependencia existente (en orden inverso) es:    [6.1667] -\u0026gt; #2 (fs_reclaim){+.+.}-{0:0}:    [6.1677] fs_reclaim_acquire+0x9d/0xd0    [6.1685] __kmalloc_cache_noprof+0x59/0x750    [6.1694] btrfs_init_file_extent_tree+0x90/0x100    [6.1702] btrfs_read_locked_inode+0xc3/0x6b0    [6.1710] btrfs_iget+0xbb/0xf0    [6.1716] btrfs_lookup_dentry+0x3c5/0x8e0    [6.1724] btrfs_lookup+0x12/0x30    [6.1731] lookup_open.isra.0+0x1aa/0x6a0    [6.1739] path_openat+0x5f7/0xc60    [6.1746] do_filp_open+0xd6/0x180    [6.1753] do_sys_openat2+0x8b/0xe0    [6.1760] __x64_sys_openat+0x54/0xa0    [6.1768] do_syscall_64+0x97/0x3e0    [6.1776] entry_SYSCALL_64_after_hwframe+0x76/0x7e    [6.1784]      -\u0026gt; #1 (btrfs-tree-00){++++}-{3:3}:    [6.1794] lock_release+0x127/0x2a0    [6.1801] up_read+0x1b/0x30    [6.1808] btrfs_search_slot+0x8e0/0xff0    [6.1817] btrfs_lookup_inode+0x52/0xd0    [6.1825] __btrfs_update_delayed_inode+0x73/0x520    [6.1833] btrfs_commit_inode_delayed_inode+0x11a/0x120    [6.1842] btrfs_log_inode+0x608/0x1aa0    [6.1849] btrfs_log_inode_parent+0x249/0xf80    [6.1857] btrfs_log_dentry_safe+0x3e/0x60    [6.1865] btrfs_sync_file+0x431/0x690    [6.1872] do_fsync+0x39/0x80    [6.1879] __x64_sys_fsync+0x13/0x20    [6.1887] do_syscall_64+0x97/0x3e0    [6.1894] entry_SYSCALL_64_after_hwframe+0x76/0x7e    [6.1903]      -\u0026gt; #0 (\u0026amp;delayed_node-\u0026gt;mutex){+.+.}-{3:3}:    [6.1913] __lock_acquire+0x15e9/0x2820    [6.1920] lock_acquire+0xc9/0x2d0    [6.1927] __mutex_lock+0xcc/0x10a0    [6.1934] __btrfs_release_delayed_node.part.0+0x39/0x2f0    [6.1944] btrfs_evict_inode+0x20b/0x4b0    [6.1952] evict+0x15a/0x2f0    [6.1958] prune_icache_sb+0x91/0xd0    [6.1966] super_cache_scan+0x150/0x1d0    [6.1974] do_shrink_slab+0x155/0x6f0    [6.1981] shrink_slab+0x48e/0x890    [6.1988] shrink_one+0x11a/0x1f0    [6.1995] shrink_node+0xbfd/0x1320    [6.1002] balance_pgdat+0x67f/0xc60    [6.1321] kswapd+0x1dc/0x3e0    [6.1643] kthread+0xff/0x240    [6.1965] ret_from_fork+0x223/0x280    [6.1287] ret_from_fork_asm+0x1a/0x30    [6.1616]      otra informaci\u00f3n que podr\u00eda ayudarnos a depurar esto:     [6.1561] La cadena existe de:        \u0026amp;delayed_node-\u0026gt;mutex --\u0026gt; btrfs-tree-00 --\u0026gt; fs_reclaim     [6.1503]  Posible escenario de bloqueo inseguro:     [6.1110] CPU0 CPU1 [6.1411] [6.1707]   lock(fs_reclaim);    [6.1998] lock(btrfs-tree-00);    [6.1291] lock(fs_reclaim);    [6.1581]   lock(\u0026amp;del ---truncado---\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"fs/btrfs/inode.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"8679d2687c351824d08cf1f0e86f3b65f22a00fe\",\"lessThan\":\"92a5590851144f034adc51fee55e6878ccac716e\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"8679d2687c351824d08cf1f0e86f3b65f22a00fe\",\"lessThan\":\"8731f2c50b0b1d2b58ed5b9671ef2c4bdc2f8347\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"e8f496001e0c7832d188ab91fea294e19a128202\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6.16.9\",\"lessThan\":\"6.17\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"fs/btrfs/inode.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6.17\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"6.17\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.6\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.19\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"NVD-CWE-noinfo\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.16.9\",\"versionEndExcluding\":\"6.17\",\"matchCriteriaId\":\"98F094CD-A7F6-4BEA-8870-C45B63E05825\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.17.1\",\"versionEndExcluding\":\"6.18.6\",\"matchCriteriaId\":\"8F0BAC72-4991-44BB-A7D4-90D634550955\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.17:-:*:*:*:*:*:*\",\"matchCriteriaId\":\"7CC8B11D-82DC-4958-8DC7-BF5CC829A5E9\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"17B67AA7-40D6-4AFA-8459-F200F3D7CFD1\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"C47E4CC9-C826-4FA9-B014-7FE3D9B318B2\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"F71D92C0-C023-48BD-B3B6-70B638EEE298\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc4:*:*:*:*:*:*\",\"matchCriteriaId\":\"13580667-0A98-40CC-B29F-D12790B91BDB\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc5:*:*:*:*:*:*\",\"matchCriteriaId\":\"CAD1FED7-CF48-47BF-AC7D-7B6FA3C065FC\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc6:*:*:*:*:*:*\",\"matchCriteriaId\":\"3EF854A1-ABB1-4E93-BE9A-44569EC76C0D\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc7:*:*:*:*:*:*\",\"matchCriteriaId\":\"F5DC0CA6-F0AF-4DDF-A882-3DADB9A886A7\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:6.19:rc8:*:*:*:*:*:*\",\"matchCriteriaId\":\"EB5B7DFC-C36B-45D8-922C-877569FDDF43\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/8731f2c50b0b1d2b58ed5b9671ef2c4bdc2f8347\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/92a5590851144f034adc51fee55e6878ccac716e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-06-28T07:18:09+00:00",
      "cve": "CVE-2026-23018",
      "id": "CVE-2026-23018",
      "initial_release_date": "2026-01-31T00:00:00+00:00",
      "product_status:known_affected": "14",
      "product_status:known_not_affected": "260",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: btrfs: release path before initializing extent tree in btrfs_read_locked_inode()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-23018.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-07-15T05:33:52Z",
      "cve": "CVE-2026-23018",
      "id": "CVE-2026-23018",
      "initial_release_date": "2026-02-01T00:24:00Z",
      "product_status:first_fixed": "2",
      "product_status:known_not_affected": "323",
      "product_status:recommended": "145",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-23018",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-23018.json",
      "version": "13"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.


Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.