{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-23214", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-01-13T15:37:45.987Z", "datePublished": "2026-02-18T14:21:51.507Z", "dateUpdated": "2026-02-18T14:21:51.507Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-02-18T14:21:51.507Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: reject new transactions if the fs is fully read-only\n\n[BUG]\nThere is a bug report where a heavily fuzzed fs is mounted with all\nrescue mount options, which leads to the following warnings during\nunmount:\n\n BTRFS: Transaction aborted (error -22)\n Modules linked in:\n CPU: 0 UID: 0 PID: 9758 Comm: repro.out Not tainted\n 6.19.0-rc5-00002-gb71e635feefc #7 PREEMPT(full)\n Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014\n RIP: 0010:find_free_extent_update_loop fs/btrfs/extent-tree.c:4208 [inline]\n RIP: 0010:find_free_extent+0x52f0/0x5d20 fs/btrfs/extent-tree.c:4611\n Call Trace:\n <TASK>\n btrfs_reserve_extent+0x2cd/0x790 fs/btrfs/extent-tree.c:4705\n btrfs_alloc_tree_block+0x1e1/0x10e0 fs/btrfs/extent-tree.c:5157\n btrfs_force_cow_block+0x578/0x2410 fs/btrfs/ctree.c:517\n btrfs_cow_block+0x3c4/0xa80 fs/btrfs/ctree.c:708\n btrfs_search_slot+0xcad/0x2b50 fs/btrfs/ctree.c:2130\n btrfs_truncate_inode_items+0x45d/0x2350 fs/btrfs/inode-item.c:499\n btrfs_evict_inode+0x923/0xe70 fs/btrfs/inode.c:5628\n evict+0x5f4/0xae0 fs/inode.c:837\n __dentry_kill+0x209/0x660 fs/dcache.c:670\n finish_dput+0xc9/0x480 fs/dcache.c:879\n shrink_dcache_for_umount+0xa0/0x170 fs/dcache.c:1661\n generic_shutdown_super+0x67/0x2c0 fs/super.c:621\n kill_anon_super+0x3b/0x70 fs/super.c:1289\n btrfs_kill_super+0x41/0x50 fs/btrfs/super.c:2127\n deactivate_locked_super+0xbc/0x130 fs/super.c:474\n cleanup_mnt+0x425/0x4c0 fs/namespace.c:1318\n task_work_run+0x1d4/0x260 kernel/task_work.c:233\n exit_task_work include/linux/task_work.h:40 [inline]\n do_exit+0x694/0x22f0 kernel/exit.c:971\n do_group_exit+0x21c/0x2d0 kernel/exit.c:1112\n __do_sys_exit_group kernel/exit.c:1123 [inline]\n __se_sys_exit_group kernel/exit.c:1121 [inline]\n __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1121\n x64_sys_call+0x2210/0x2210 arch/x86/include/generated/asm/syscalls_64.h:232\n do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n do_syscall_64+0xe8/0xf80 arch/x86/entry/syscall_64.c:94\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n RIP: 0033:0x44f639\n Code: Unable to access opcode bytes at 0x44f60f.\n RSP: 002b:00007ffc15c4e088 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7\n RAX: ffffffffffffffda RBX: 00000000004c32f0 RCX: 000000000044f639\n RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001\n RBP: 0000000000000001 R08: ffffffffffffffc0 R09: 0000000000000000\n R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004c32f0\n R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001\n </TASK>\n\nSince rescue mount options will mark the full fs read-only, there should\nbe no new transaction triggered.\n\nBut during unmount we will evict all inodes, which can trigger a new\ntransaction, and triggers warnings on a heavily corrupted fs.\n\n[CAUSE]\nBtrfs allows new transaction even on a read-only fs, this is to allow\nlog replay happen even on read-only mounts, just like what ext4/xfs do.\n\nHowever with rescue mount options, the fs is fully read-only and cannot\nbe remounted read-write, thus in that case we should also reject any new\ntransactions.\n\n[FIX]\nIf we find the fs has rescue mount options, we should treat the fs as\nerror, so that no new transaction can be started."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/btrfs/disk-io.c", "fs/btrfs/fs.h"], "versions": [{"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "a928eecf030a9a5dc5f5ca98332699f379b91963", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "3228b2eceb6c3d7e237f8a5330113dbd164fb90d", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "1972f44c189c8aacde308fa9284e474c1a5cbd9f", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/btrfs/disk-io.c", "fs/btrfs/fs.h"], "versions": [{"version": "6.12.70", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.10", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "6.12.70"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "6.18.10"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionEndExcluding": "6.19"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/a928eecf030a9a5dc5f5ca98332699f379b91963"}, {"url": "https://git.kernel.org/stable/c/3228b2eceb6c3d7e237f8a5330113dbd164fb90d"}, {"url": "https://git.kernel.org/stable/c/1972f44c189c8aacde308fa9284e474c1a5cbd9f"}], "title": "btrfs: reject new transactions if the fs is fully read-only", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: reject new transactions if the fs is fully read-only\n\n[BUG]\nThere is a bug report where a heavily fuzzed fs is mounted with all\nrescue mount options, which leads to the following warnings during\nunmount:\n\n BTRFS: Transaction aborted (error -22)\n Modules linked in:\n CPU: 0 UID: 0 PID: 9758 Comm: repro.out Not tainted\n 6.19.0-rc5-00002-gb71e635feefc #7 PREEMPT(full)\n Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.15.0-1 04/01/2014\n RIP: 0010:find_free_extent_update_loop fs/btrfs/extent-tree.c:4208 [inline]\n RIP: 0010:find_free_extent+0x52f0/0x5d20 fs/btrfs/extent-tree.c:4611\n Call Trace:\n <TASK>\n btrfs_reserve_extent+0x2cd/0x790 fs/btrfs/extent-tree.c:4705\n btrfs_alloc_tree_block+0x1e1/0x10e0 fs/btrfs/extent-tree.c:5157\n btrfs_force_cow_block+0x578/0x2410 fs/btrfs/ctree.c:517\n btrfs_cow_block+0x3c4/0xa80 fs/btrfs/ctree.c:708\n btrfs_search_slot+0xcad/0x2b50 fs/btrfs/ctree.c:2130\n btrfs_truncate_inode_items+0x45d/0x2350 fs/btrfs/inode-item.c:499\n btrfs_evict_inode+0x923/0xe70 fs/btrfs/inode.c:5628\n evict+0x5f4/0xae0 fs/inode.c:837\n __dentry_kill+0x209/0x660 fs/dcache.c:670\n finish_dput+0xc9/0x480 fs/dcache.c:879\n shrink_dcache_for_umount+0xa0/0x170 fs/dcache.c:1661\n generic_shutdown_super+0x67/0x2c0 fs/super.c:621\n kill_anon_super+0x3b/0x70 fs/super.c:1289\n btrfs_kill_super+0x41/0x50 fs/btrfs/super.c:2127\n deactivate_locked_super+0xbc/0x130 fs/super.c:474\n cleanup_mnt+0x425/0x4c0 fs/namespace.c:1318\n task_work_run+0x1d4/0x260 kernel/task_work.c:233\n exit_task_work include/linux/task_work.h:40 [inline]\n do_exit+0x694/0x22f0 kernel/exit.c:971\n do_group_exit+0x21c/0x2d0 kernel/exit.c:1112\n __do_sys_exit_group kernel/exit.c:1123 [inline]\n __se_sys_exit_group kernel/exit.c:1121 [inline]\n __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1121\n x64_sys_call+0x2210/0x2210 arch/x86/include/generated/asm/syscalls_64.h:232\n do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]\n do_syscall_64+0xe8/0xf80 arch/x86/entry/syscall_64.c:94\n entry_SYSCALL_64_after_hwframe+0x77/0x7f\n RIP: 0033:0x44f639\n Code: Unable to access opcode bytes at 0x44f60f.\n RSP: 002b:00007ffc15c4e088 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7\n RAX: ffffffffffffffda RBX: 00000000004c32f0 RCX: 000000000044f639\n RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000001\n RBP: 0000000000000001 R08: ffffffffffffffc0 R09: 0000000000000000\n R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004c32f0\n R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001\n </TASK>\n\nSince rescue mount options will mark the full fs read-only, there should\nbe no new transaction triggered.\n\nBut during unmount we will evict all inodes, which can trigger a new\ntransaction, and triggers warnings on a heavily corrupted fs.\n\n[CAUSE]\nBtrfs allows new transaction even on a read-only fs, this is to allow\nlog replay happen even on read-only mounts, just like what ext4/xfs do.\n\nHowever with rescue mount options, the fs is fully read-only and cannot\nbe remounted read-write, thus in that case we should also reject any new\ntransactions.\n\n[FIX]\nIf we find the fs has rescue mount options, we should treat the fs as\nerror, so that no new transaction can be started."}], "id": "CVE-2026-23214", "lastModified": "2026-02-18T15:18:42.717", "metrics": {}, "published": "2026-02-18T15:18:42.717", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/1972f44c189c8aacde308fa9284e474c1a5cbd9f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3228b2eceb6c3d7e237f8a5330113dbd164fb90d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a928eecf030a9a5dc5f5ca98332699f379b91963"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{}