122 lines
8.7 KiB
JSON
122 lines
8.7 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-23036",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2026-01-13T15:37:45.943Z",
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"datePublished": "2026-01-31T11:42:30.782Z",
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"dateUpdated": "2026-05-11T21:58:45.739Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-05-11T21:58:45.739Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: release path before iget_failed() in btrfs_read_locked_inode()\n\nIn btrfs_read_locked_inode() if we fail to lookup the inode, we jump to\nthe 'out' label with a path that has a read locked leaf and then we call\niget_failed(). This can result in a ABBA deadlock, since iget_failed()\ntriggers inode eviction and that causes the release of the delayed inode,\nwhich must lock the delayed inode's mutex, and a task updating a delayed\ninode starts by taking the node's mutex and then modifying the inode's\nsubvolume btree.\n\nSyzbot reported the following lockdep splat for this:\n\n ======================================================\n WARNING: possible circular locking dependency detected\n syzkaller #0 Not tainted\n ------------------------------------------------------\n btrfs-cleaner/8725 is trying to acquire lock:\n ffff0000d6826a48 (&delayed_node->mutex){+.+.}-{4:4}, at: __btrfs_release_delayed_node+0xa0/0x9b0 fs/btrfs/delayed-inode.c:290\n\n but task is already holding lock:\n ffff0000dbeba878 (btrfs-tree-00){++++}-{4:4}, at: btrfs_tree_read_lock_nested+0x44/0x2ec fs/btrfs/locking.c:145\n\n which lock already depends on the new lock.\n\n the existing dependency chain (in reverse order) is:\n\n -> #1 (btrfs-tree-00){++++}-{4:4}:\n __lock_release kernel/locking/lockdep.c:5574 [inline]\n lock_release+0x198/0x39c kernel/locking/lockdep.c:5889\n up_read+0x24/0x3c kernel/locking/rwsem.c:1632\n btrfs_tree_read_unlock+0xdc/0x298 fs/btrfs/locking.c:169\n btrfs_tree_unlock_rw fs/btrfs/locking.h:218 [inline]\n btrfs_search_slot+0xa6c/0x223c fs/btrfs/ctree.c:2133\n btrfs_lookup_inode+0xd8/0x38c fs/btrfs/inode-item.c:395\n __btrfs_update_delayed_inode+0x124/0xed0 fs/btrfs/delayed-inode.c:1032\n btrfs_update_delayed_inode fs/btrfs/delayed-inode.c:1118 [inline]\n __btrfs_commit_inode_delayed_items+0x15f8/0x1748 fs/btrfs/delayed-inode.c:1141\n __btrfs_run_delayed_items+0x1ac/0x514 fs/btrfs/delayed-inode.c:1176\n btrfs_run_delayed_items_nr+0x28/0x38 fs/btrfs/delayed-inode.c:1219\n flush_space+0x26c/0xb68 fs/btrfs/space-info.c:828\n do_async_reclaim_metadata_space+0x110/0x364 fs/btrfs/space-info.c:1158\n btrfs_async_reclaim_metadata_space+0x90/0xd8 fs/btrfs/space-info.c:1226\n process_one_work+0x7e8/0x155c kernel/workqueue.c:3263\n process_scheduled_works kernel/workqueue.c:3346 [inline]\n worker_thread+0x958/0xed8 kernel/workqueue.c:3427\n kthread+0x5fc/0x75c kernel/kthread.c:463\n ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:844\n\n -> #0 (&delayed_node->mutex){+.+.}-{4:4}:\n check_prev_add kernel/locking/lockdep.c:3165 [inline]\n check_prevs_add kernel/locking/lockdep.c:3284 [inline]\n validate_chain kernel/locking/lockdep.c:3908 [inline]\n __lock_acquire+0x1774/0x30a4 kernel/locking/lockdep.c:5237\n lock_acquire+0x14c/0x2e0 kernel/locking/lockdep.c:5868\n __mutex_lock_common+0x1d0/0x2678 kernel/locking/mutex.c:598\n __mutex_lock kernel/locking/mutex.c:760 [inline]\n mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:812\n __btrfs_release_delayed_node+0xa0/0x9b0 fs/btrfs/delayed-inode.c:290\n btrfs_release_delayed_node fs/btrfs/delayed-inode.c:315 [inline]\n btrfs_remove_delayed_node+0x68/0x84 fs/btrfs/delayed-inode.c:1326\n btrfs_evict_inode+0x578/0xe28 fs/btrfs/inode.c:5587\n evict+0x414/0x928 fs/inode.c:810\n iput_final fs/inode.c:1914 [inline]\n iput+0x95c/0xad4 fs/inode.c:1966\n iget_failed+0xec/0x134 fs/bad_inode.c:248\n btrfs_read_locked_inode+0xe1c/0x1234 fs/btrfs/inode.c:4101\n btrfs_iget+0x1b0/0x264 fs/btrfs/inode.c:5837\n btrfs_run_defrag_inode fs/btrfs/defrag.c:237 [inline]\n btrfs_run_defrag_inodes+0x520/0xdc4 fs/btrf\n---truncated---"
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"fs/btrfs/inode.c"
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],
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"versions": [
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{
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"version": "69673992b1aea5540199d9b8b658ede72f55a6cf",
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"lessThan": "65241e3ddda60b53a4ee3ae12721fc9ee21d5827",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "69673992b1aea5540199d9b8b658ede72f55a6cf",
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"lessThan": "1e1f2055ad5a7a5d548789b334a4473a7665c418",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"fs/btrfs/inode.c"
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],
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"versions": [
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{
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"version": "6.13",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "6.13",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.18.7",
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"lessThanOrEqual": "6.18.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.19",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.13",
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"versionEndExcluding": "6.18.7"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "6.13",
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"versionEndExcluding": "6.19"
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/65241e3ddda60b53a4ee3ae12721fc9ee21d5827"
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},
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{
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"url": "https://git.kernel.org/stable/c/1e1f2055ad5a7a5d548789b334a4473a7665c418"
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}
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],
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"title": "btrfs: release path before iget_failed() in btrfs_read_locked_inode()",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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}
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}
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} |