CVE-2024-26644 (GCVE-0-2024-26644)

Vulnerability from cvelistv5 – Published: 2024-03-26 15:17 – Updated: 2026-05-11 20:01
VLAI
Title
btrfs: don't abort filesystem when attempting to snapshot deleted subvolume
Summary
In the Linux kernel, the following vulnerability has been resolved: btrfs: don't abort filesystem when attempting to snapshot deleted subvolume If the source file descriptor to the snapshot ioctl refers to a deleted subvolume, we get the following abort: BTRFS: Transaction aborted (error -2) WARNING: CPU: 0 PID: 833 at fs/btrfs/transaction.c:1875 create_pending_snapshot+0x1040/0x1190 [btrfs] Modules linked in: pata_acpi btrfs ata_piix libata scsi_mod virtio_net blake2b_generic xor net_failover virtio_rng failover scsi_common rng_core raid6_pq libcrc32c CPU: 0 PID: 833 Comm: t_snapshot_dele Not tainted 6.7.0-rc6 #2 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-1.fc39 04/01/2014 RIP: 0010:create_pending_snapshot+0x1040/0x1190 [btrfs] RSP: 0018:ffffa09c01337af8 EFLAGS: 00010282 RAX: 0000000000000000 RBX: ffff9982053e7c78 RCX: 0000000000000027 RDX: ffff99827dc20848 RSI: 0000000000000001 RDI: ffff99827dc20840 RBP: ffffa09c01337c00 R08: 0000000000000000 R09: ffffa09c01337998 R10: 0000000000000003 R11: ffffffffb96da248 R12: fffffffffffffffe R13: ffff99820535bb28 R14: ffff99820b7bd000 R15: ffff99820381ea80 FS: 00007fe20aadabc0(0000) GS:ffff99827dc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000559a120b502f CR3: 00000000055b6000 CR4: 00000000000006f0 Call Trace: <TASK> ? create_pending_snapshot+0x1040/0x1190 [btrfs] ? __warn+0x81/0x130 ? create_pending_snapshot+0x1040/0x1190 [btrfs] ? report_bug+0x171/0x1a0 ? handle_bug+0x3a/0x70 ? exc_invalid_op+0x17/0x70 ? asm_exc_invalid_op+0x1a/0x20 ? create_pending_snapshot+0x1040/0x1190 [btrfs] ? create_pending_snapshot+0x1040/0x1190 [btrfs] create_pending_snapshots+0x92/0xc0 [btrfs] btrfs_commit_transaction+0x66b/0xf40 [btrfs] btrfs_mksubvol+0x301/0x4d0 [btrfs] btrfs_mksnapshot+0x80/0xb0 [btrfs] __btrfs_ioctl_snap_create+0x1c2/0x1d0 [btrfs] btrfs_ioctl_snap_create_v2+0xc4/0x150 [btrfs] btrfs_ioctl+0x8a6/0x2650 [btrfs] ? kmem_cache_free+0x22/0x340 ? do_sys_openat2+0x97/0xe0 __x64_sys_ioctl+0x97/0xd0 do_syscall_64+0x46/0xf0 entry_SYSCALL_64_after_hwframe+0x6e/0x76 RIP: 0033:0x7fe20abe83af RSP: 002b:00007ffe6eff1360 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007fe20abe83af RDX: 00007ffe6eff23c0 RSI: 0000000050009417 RDI: 0000000000000003 RBP: 0000000000000003 R08: 0000000000000000 R09: 00007fe20ad16cd0 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffe6eff13c0 R14: 00007fe20ad45000 R15: 0000559a120b6d58 </TASK> ---[ end trace 0000000000000000 ]--- BTRFS: error (device vdc: state A) in create_pending_snapshot:1875: errno=-2 No such entry BTRFS info (device vdc: state EA): forced readonly BTRFS warning (device vdc: state EA): Skipping commit of aborted transaction. BTRFS: error (device vdc: state EA) in cleanup_transaction:2055: errno=-2 No such entry This happens because create_pending_snapshot() initializes the new root item as a copy of the source root item. This includes the refs field, which is 0 for a deleted subvolume. The call to btrfs_insert_root() therefore inserts a root with refs == 0. btrfs_get_new_fs_root() then finds the root and returns -ENOENT if refs == 0, which causes create_pending_snapshot() to abort. Fix it by checking the source root's refs before attempting the snapshot, but after locking subvol_sem to avoid racing with deletion.
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator (v2.0.3)
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: d68fc57b7e3245cfacf2e3b47acfed1946a11786 , < c06941564027bdbc01d2df7f41e333c11cb0482d (git)
Affected: d68fc57b7e3245cfacf2e3b47acfed1946a11786 , < 2bdf872bcfe629a6202ffd6641615a8ed00e8464 (git)
Affected: d68fc57b7e3245cfacf2e3b47acfed1946a11786 , < 0877497dc97834728e1b528ddf1e1c484292c29c (git)
Affected: d68fc57b7e3245cfacf2e3b47acfed1946a11786 , < 6e6bca99e8d88d989a7cde4c064abea552d5219b (git)
Affected: d68fc57b7e3245cfacf2e3b47acfed1946a11786 , < ec794a7528199e1be6d47bec03f4755aa75df256 (git)
Affected: d68fc57b7e3245cfacf2e3b47acfed1946a11786 , < d8680b722f0ff6d7a01ddacc1844e0d52354d6ff (git)
Affected: d68fc57b7e3245cfacf2e3b47acfed1946a11786 , < 7081929ab2572920e94d70be3d332e5c9f97095a (git)
Create a notification for this product.
Linux Linux Affected: 2.6.35
Unaffected: 0 , < 2.6.35 (semver)
Unaffected: 5.4.296 , ≤ 5.4.* (semver)
Unaffected: 5.10.210 , ≤ 5.10.* (semver)
Unaffected: 5.15.149 , ≤ 5.15.* (semver)
Unaffected: 6.1.76 , ≤ 6.1.* (semver)
Unaffected: 6.6.15 , ≤ 6.6.* (semver)
Unaffected: 6.7.3 , ≤ 6.7.* (semver)
Unaffected: 6.8 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: don\u0027t abort filesystem when attempting to snapshot deleted subvolume\n\nIf the source file descriptor to the snapshot ioctl refers to a deleted\nsubvolume, we get the following abort:\n\n  BTRFS: Transaction aborted (error -2)\n  WARNING: CPU: 0 PID: 833 at fs/btrfs/transaction.c:1875 create_pending_snapshot+0x1040/0x1190 [btrfs]\n  Modules linked in: pata_acpi btrfs ata_piix libata scsi_mod virtio_net blake2b_generic xor net_failover virtio_rng failover scsi_common rng_core raid6_pq libcrc32c\n  CPU: 0 PID: 833 Comm: t_snapshot_dele Not tainted 6.7.0-rc6 #2\n  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-1.fc39 04/01/2014\n  RIP: 0010:create_pending_snapshot+0x1040/0x1190 [btrfs]\n  RSP: 0018:ffffa09c01337af8 EFLAGS: 00010282\n  RAX: 0000000000000000 RBX: ffff9982053e7c78 RCX: 0000000000000027\n  RDX: ffff99827dc20848 RSI: 0000000000000001 RDI: ffff99827dc20840\n  RBP: ffffa09c01337c00 R08: 0000000000000000 R09: ffffa09c01337998\n  R10: 0000000000000003 R11: ffffffffb96da248 R12: fffffffffffffffe\n  R13: ffff99820535bb28 R14: ffff99820b7bd000 R15: ffff99820381ea80\n  FS:  00007fe20aadabc0(0000) GS:ffff99827dc00000(0000) knlGS:0000000000000000\n  CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n  CR2: 0000559a120b502f CR3: 00000000055b6000 CR4: 00000000000006f0\n  Call Trace:\n   \u003cTASK\u003e\n   ? create_pending_snapshot+0x1040/0x1190 [btrfs]\n   ? __warn+0x81/0x130\n   ? create_pending_snapshot+0x1040/0x1190 [btrfs]\n   ? report_bug+0x171/0x1a0\n   ? handle_bug+0x3a/0x70\n   ? exc_invalid_op+0x17/0x70\n   ? asm_exc_invalid_op+0x1a/0x20\n   ? create_pending_snapshot+0x1040/0x1190 [btrfs]\n   ? create_pending_snapshot+0x1040/0x1190 [btrfs]\n   create_pending_snapshots+0x92/0xc0 [btrfs]\n   btrfs_commit_transaction+0x66b/0xf40 [btrfs]\n   btrfs_mksubvol+0x301/0x4d0 [btrfs]\n   btrfs_mksnapshot+0x80/0xb0 [btrfs]\n   __btrfs_ioctl_snap_create+0x1c2/0x1d0 [btrfs]\n   btrfs_ioctl_snap_create_v2+0xc4/0x150 [btrfs]\n   btrfs_ioctl+0x8a6/0x2650 [btrfs]\n   ? kmem_cache_free+0x22/0x340\n   ? do_sys_openat2+0x97/0xe0\n   __x64_sys_ioctl+0x97/0xd0\n   do_syscall_64+0x46/0xf0\n   entry_SYSCALL_64_after_hwframe+0x6e/0x76\n  RIP: 0033:0x7fe20abe83af\n  RSP: 002b:00007ffe6eff1360 EFLAGS: 00000246 ORIG_RAX: 0000000000000010\n  RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007fe20abe83af\n  RDX: 00007ffe6eff23c0 RSI: 0000000050009417 RDI: 0000000000000003\n  RBP: 0000000000000003 R08: 0000000000000000 R09: 00007fe20ad16cd0\n  R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000\n  R13: 00007ffe6eff13c0 R14: 00007fe20ad45000 R15: 0000559a120b6d58\n   \u003c/TASK\u003e\n  ---[ end trace 0000000000000000 ]---\n  BTRFS: error (device vdc: state A) in create_pending_snapshot:1875: errno=-2 No such entry\n  BTRFS info (device vdc: state EA): forced readonly\n  BTRFS warning (device vdc: state EA): Skipping commit of aborted transaction.\n  BTRFS: error (device vdc: state EA) in cleanup_transaction:2055: errno=-2 No such entry\n\nThis happens because create_pending_snapshot() initializes the new root\nitem as a copy of the source root item. This includes the refs field,\nwhich is 0 for a deleted subvolume. The call to btrfs_insert_root()\ntherefore inserts a root with refs == 0. btrfs_get_new_fs_root() then\nfinds the root and returns -ENOENT if refs == 0, which causes\ncreate_pending_snapshot() to abort.\n\nFix it by checking the source root\u0027s refs before attempting the\nsnapshot, but after locking subvol_sem to avoid racing with deletion."
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    "nvd": "{\"cve\":{\"id\":\"CVE-2024-26644\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-03-26T16:15:12.137\",\"lastModified\":\"2026-06-17T07:17:59.353\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nbtrfs: don\u0027t abort filesystem when attempting to snapshot deleted subvolume\\n\\nIf the source file descriptor to the snapshot ioctl refers to a deleted\\nsubvolume, we get the following abort:\\n\\n  BTRFS: Transaction aborted (error -2)\\n  WARNING: CPU: 0 PID: 833 at fs/btrfs/transaction.c:1875 create_pending_snapshot+0x1040/0x1190 [btrfs]\\n  Modules linked in: pata_acpi btrfs ata_piix libata scsi_mod virtio_net blake2b_generic xor net_failover virtio_rng failover scsi_common rng_core raid6_pq libcrc32c\\n  CPU: 0 PID: 833 Comm: t_snapshot_dele Not tainted 6.7.0-rc6 #2\\n  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-1.fc39 04/01/2014\\n  RIP: 0010:create_pending_snapshot+0x1040/0x1190 [btrfs]\\n  RSP: 0018:ffffa09c01337af8 EFLAGS: 00010282\\n  RAX: 0000000000000000 RBX: ffff9982053e7c78 RCX: 0000000000000027\\n  RDX: ffff99827dc20848 RSI: 0000000000000001 RDI: ffff99827dc20840\\n  RBP: ffffa09c01337c00 R08: 0000000000000000 R09: ffffa09c01337998\\n  R10: 0000000000000003 R11: ffffffffb96da248 R12: fffffffffffffffe\\n  R13: ffff99820535bb28 R14: ffff99820b7bd000 R15: ffff99820381ea80\\n  FS:  00007fe20aadabc0(0000) GS:ffff99827dc00000(0000) knlGS:0000000000000000\\n  CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\\n  CR2: 0000559a120b502f CR3: 00000000055b6000 CR4: 00000000000006f0\\n  Call Trace:\\n   \u003cTASK\u003e\\n   ? create_pending_snapshot+0x1040/0x1190 [btrfs]\\n   ? __warn+0x81/0x130\\n   ? create_pending_snapshot+0x1040/0x1190 [btrfs]\\n   ? report_bug+0x171/0x1a0\\n   ? handle_bug+0x3a/0x70\\n   ? exc_invalid_op+0x17/0x70\\n   ? asm_exc_invalid_op+0x1a/0x20\\n   ? create_pending_snapshot+0x1040/0x1190 [btrfs]\\n   ? create_pending_snapshot+0x1040/0x1190 [btrfs]\\n   create_pending_snapshots+0x92/0xc0 [btrfs]\\n   btrfs_commit_transaction+0x66b/0xf40 [btrfs]\\n   btrfs_mksubvol+0x301/0x4d0 [btrfs]\\n   btrfs_mksnapshot+0x80/0xb0 [btrfs]\\n   __btrfs_ioctl_snap_create+0x1c2/0x1d0 [btrfs]\\n   btrfs_ioctl_snap_create_v2+0xc4/0x150 [btrfs]\\n   btrfs_ioctl+0x8a6/0x2650 [btrfs]\\n   ? kmem_cache_free+0x22/0x340\\n   ? do_sys_openat2+0x97/0xe0\\n   __x64_sys_ioctl+0x97/0xd0\\n   do_syscall_64+0x46/0xf0\\n   entry_SYSCALL_64_after_hwframe+0x6e/0x76\\n  RIP: 0033:0x7fe20abe83af\\n  RSP: 002b:00007ffe6eff1360 EFLAGS: 00000246 ORIG_RAX: 0000000000000010\\n  RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007fe20abe83af\\n  RDX: 00007ffe6eff23c0 RSI: 0000000050009417 RDI: 0000000000000003\\n  RBP: 0000000000000003 R08: 0000000000000000 R09: 00007fe20ad16cd0\\n  R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000\\n  R13: 00007ffe6eff13c0 R14: 00007fe20ad45000 R15: 0000559a120b6d58\\n   \u003c/TASK\u003e\\n  ---[ end trace 0000000000000000 ]---\\n  BTRFS: error (device vdc: state A) in create_pending_snapshot:1875: errno=-2 No such entry\\n  BTRFS info (device vdc: state EA): forced readonly\\n  BTRFS warning (device vdc: state EA): Skipping commit of aborted transaction.\\n  BTRFS: error (device vdc: state EA) in cleanup_transaction:2055: errno=-2 No such entry\\n\\nThis happens because create_pending_snapshot() initializes the new root\\nitem as a copy of the source root item. This includes the refs field,\\nwhich is 0 for a deleted subvolume. The call to btrfs_insert_root()\\ntherefore inserts a root with refs == 0. btrfs_get_new_fs_root() then\\nfinds the root and returns -ENOENT if refs == 0, which causes\\ncreate_pending_snapshot() to abort.\\n\\nFix it by checking the source root\u0027s refs before attempting the\\nsnapshot, but after locking subvol_sem to avoid racing with deletion.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: btrfs: no aborte el sistema de archivos al intentar crear una instant\u00e1nea del subvolumen eliminado. Si el descriptor del archivo fuente de la instant\u00e1nea ioctl se refiere a un subvolumen eliminado, obtenemos la siguiente cancelaci\u00f3n: BTRFS: transacci\u00f3n abortada (error -2) ADVERTENCIA: CPU: 0 PID: 833 en fs/btrfs/transaction.c:1875 create_pending_snapshot+0x1040/0x1190 [btrfs] M\u00f3dulos vinculados en: pata_acpi btrfs ata_piix libata scsi_mod virtio_net blake2b_generic xor net_failover virtio_rng failover scsi_common rng_core raid6_pq libcrc32c CPU: 0 PID: 833 Comm: t_snapshot_dele No contaminado 6.7.0-rc6 #2 Nombre del hardware: PC est\u00e1ndar QEMU (i440FX + PIIX, 1996), BIOS 1.16.3-1.fc39 01/04/2014 RIP: 0010:create_pending_snapshot +0x1040/0x1190 [btrfs] RSP: 0018:ffffa09c01337af8 EFLAGS: 00010282 RAX: 0000000000000000 RBX: ffff9982053e7c78 RCX: 0000000000000027 RDX: ffff99 827dc20848 RSI: 0000000000000001 RDI: ffff99827dc20840 RBP: ffffa09c01337c00 R08: 00000000000000000 R09: ffffa09c01337998 R10: 000000000000000003 R11: ffffffffb96da248 R12: fffffffffffffffe R13: ffff99820535bb28 R14: ffff99820b7bd000 R15: ffff99820381ea80 FS: 00007fe20aadabc0(0000) GS:ffff99827dc00000(0000) knlGS:000000000000 0000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000559a120b502f CR3: 00000000055b6000 CR4: 00000000000006f0 Rastreo de llamadas: \u0026lt; TAREA\u0026gt; ? create_pending_snapshot+0x1040/0x1190 [btrfs]? __advertir+0x81/0x130 ? create_pending_snapshot+0x1040/0x1190 [btrfs]? report_bug+0x171/0x1a0? handle_bug+0x3a/0x70? exc_invalid_op+0x17/0x70? asm_exc_invalid_op+0x1a/0x20? create_pending_snapshot+0x1040/0x1190 [btrfs]? create_pending_snapshot+0x1040/0x1190 [btrfs] create_pending_snapshots+0x92/0xc0 [btrfs] btrfs_commit_transaction+0x66b/0xf40 [btrfs] btrfs_mksubvol+0x301/0x4d0 [btrfs] btrfs_mksnapshot+0x8 0/0xb0 [btrfs] __btrfs_ioctl_snap_create+0x1c2/0x1d0 [btrfs] btrfs_ioctl_snap_create_v2+ 0xc4/0x150 [btrfs] btrfs_ioctl+0x8a6/0x2650 [btrfs] ? kmem_cache_free+0x22/0x340? do_sys_openat2+0x97/0xe0 __x64_sys_ioctl+0x97/0xd0 do_syscall_64+0x46/0xf0 Entry_SYSCALL_64_after_hwframe+0x6e/0x76 RIP: 0033:0x7fe20abe83af RSP: 002b:00007ffe6eff13 60 EFLAGS: 00000246 ORIG_RAX: 00000000000000010 RAX: ffffffffffffffda RBX: 00000000000000004 RCX: 00007fe20abe83af RDX: 00007ffe6eff23c0 RSI: 0000000050009417 RDI: 0000000000000003 RBP: 0000000000000003 R08: 0000000000000000 R09: 00007fe20ad16cd0 R10: 0000000000000000 R11: 00 00000000000246 R12: 0000000000000000 R13: 00007ffe6eff13c0 R14: 00007fe20ad45000 R15: 0000559a120b6d58  ---[ final de seguimiento 0000000000000000 ]--- BTRFS: error ( dispositivo vdc: estado A) en create_pending_snapshot:1875: errno=-2 No existe tal entrada Informaci\u00f3n BTRFS (dispositivo vdc: estado EA): solo lectura forzada Advertencia BTRFS (dispositivo vdc: estado EA): omitir confirmaci\u00f3n de transacci\u00f3n abortada. BTRFS: error (dispositivo vdc: estado EA) en cleanup_transaction:2055: errno=-2 No existe tal entrada. Esto sucede porque create_pending_snapshot() inicializa el nuevo elemento ra\u00edz como una copia del elemento ra\u00edz de origen. Esto incluye el campo de referencias, que es 0 para un subvolumen eliminado. Por lo tanto, la llamada a btrfs_insert_root() inserta una ra\u00edz con refs == 0. btrfs_get_new_fs_root() luego encuentra la ra\u00edz y devuelve -ENOENT si refs == 0, lo que hace que create_pending_snapshot() aborte. Solucionelo verificando las referencias de la ra\u00edz de origen antes de intentar la instant\u00e1nea, pero despu\u00e9s de bloquear subvol_sem para evitar correr con la eliminaci\u00f3n.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"fs/btrfs/ioctl.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"d68fc57b7e3245cfacf2e3b47acfed1946a11786\",\"lessThan\":\"c06941564027bdbc01d2df7f41e333c11cb0482d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d68fc57b7e3245cfacf2e3b47acfed1946a11786\",\"lessThan\":\"2bdf872bcfe629a6202ffd6641615a8ed00e8464\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d68fc57b7e3245cfacf2e3b47acfed1946a11786\",\"lessThan\":\"0877497dc97834728e1b528ddf1e1c484292c29c\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d68fc57b7e3245cfacf2e3b47acfed1946a11786\",\"lessThan\":\"6e6bca99e8d88d989a7cde4c064abea552d5219b\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d68fc57b7e3245cfacf2e3b47acfed1946a11786\",\"lessThan\":\"ec794a7528199e1be6d47bec03f4755aa75df256\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d68fc57b7e3245cfacf2e3b47acfed1946a11786\",\"lessThan\":\"d8680b722f0ff6d7a01ddacc1844e0d52354d6ff\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"d68fc57b7e3245cfacf2e3b47acfed1946a11786\",\"lessThan\":\"7081929ab2572920e94d70be3d332e5c9f97095a\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"fs/btrfs/ioctl.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"2.6.35\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"2.6.35\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.4.296\",\"lessThanOrEqual\":\"5.4.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.210\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.149\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.76\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.15\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.7.3\",\"lessThanOrEqual\":\"6.7.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.8\",\"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}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2024-06-21T16:07:39.514220Z\",\"id\":\"CVE-2024-26644\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA 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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2025-11-21T13:42:19+00:00",
      "cve": "CVE-2024-26644",
      "id": "CVE-2024-26644",
      "initial_release_date": "2024-03-26T00:00:00+00:00",
      "product_status:known_affected": "42",
      "product_status:known_not_affected": "156",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: btrfs: don\u0027t abort filesystem when attempting to snapshot deleted subvolume",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2024/cve-2024-26644.json",
      "version": "3"
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\"git\"}, {\"status\": \"affected\", \"version\": \"d68fc57b7e3245cfacf2e3b47acfed1946a11786\", \"lessThan\": \"2bdf872bcfe629a6202ffd6641615a8ed00e8464\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"d68fc57b7e3245cfacf2e3b47acfed1946a11786\", \"lessThan\": \"0877497dc97834728e1b528ddf1e1c484292c29c\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"d68fc57b7e3245cfacf2e3b47acfed1946a11786\", \"lessThan\": \"6e6bca99e8d88d989a7cde4c064abea552d5219b\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"d68fc57b7e3245cfacf2e3b47acfed1946a11786\", \"lessThan\": \"ec794a7528199e1be6d47bec03f4755aa75df256\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"d68fc57b7e3245cfacf2e3b47acfed1946a11786\", \"lessThan\": \"d8680b722f0ff6d7a01ddacc1844e0d52354d6ff\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"d68fc57b7e3245cfacf2e3b47acfed1946a11786\", \"lessThan\": \"7081929ab2572920e94d70be3d332e5c9f97095a\", \"versionType\": \"git\"}], \"programFiles\": [\"fs/btrfs/ioctl.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"2.6.35\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"2.6.35\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.4.296\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.210\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.149\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.76\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.15\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.7.3\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.7.*\"}, {\"status\": \"unaffected\", \"version\": \"6.8\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"fs/btrfs/ioctl.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/c06941564027bdbc01d2df7f41e333c11cb0482d\"}, {\"url\": \"https://git.kernel.org/stable/c/2bdf872bcfe629a6202ffd6641615a8ed00e8464\"}, {\"url\": \"https://git.kernel.org/stable/c/0877497dc97834728e1b528ddf1e1c484292c29c\"}, {\"url\": \"https://git.kernel.org/stable/c/6e6bca99e8d88d989a7cde4c064abea552d5219b\"}, {\"url\": \"https://git.kernel.org/stable/c/ec794a7528199e1be6d47bec03f4755aa75df256\"}, {\"url\": \"https://git.kernel.org/stable/c/d8680b722f0ff6d7a01ddacc1844e0d52354d6ff\"}, {\"url\": \"https://git.kernel.org/stable/c/7081929ab2572920e94d70be3d332e5c9f97095a\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nbtrfs: don\u0027t abort filesystem when attempting to snapshot deleted subvolume\\n\\nIf the source file descriptor to the snapshot ioctl refers to a deleted\\nsubvolume, we get the following abort:\\n\\n  BTRFS: Transaction aborted (error -2)\\n  WARNING: CPU: 0 PID: 833 at fs/btrfs/transaction.c:1875 create_pending_snapshot+0x1040/0x1190 [btrfs]\\n  Modules linked in: pata_acpi btrfs ata_piix libata scsi_mod virtio_net blake2b_generic xor net_failover virtio_rng failover scsi_common rng_core raid6_pq libcrc32c\\n  CPU: 0 PID: 833 Comm: t_snapshot_dele Not tainted 6.7.0-rc6 #2\\n  Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.16.3-1.fc39 04/01/2014\\n  RIP: 0010:create_pending_snapshot+0x1040/0x1190 [btrfs]\\n  RSP: 0018:ffffa09c01337af8 EFLAGS: 00010282\\n  RAX: 0000000000000000 RBX: ffff9982053e7c78 RCX: 0000000000000027\\n  RDX: ffff99827dc20848 RSI: 0000000000000001 RDI: ffff99827dc20840\\n  RBP: ffffa09c01337c00 R08: 0000000000000000 R09: ffffa09c01337998\\n  R10: 0000000000000003 R11: ffffffffb96da248 R12: fffffffffffffffe\\n  R13: ffff99820535bb28 R14: ffff99820b7bd000 R15: ffff99820381ea80\\n  FS:  00007fe20aadabc0(0000) GS:ffff99827dc00000(0000) knlGS:0000000000000000\\n  CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\\n  CR2: 0000559a120b502f CR3: 00000000055b6000 CR4: 00000000000006f0\\n  Call Trace:\\n   \u003cTASK\u003e\\n   ? create_pending_snapshot+0x1040/0x1190 [btrfs]\\n   ? __warn+0x81/0x130\\n   ? create_pending_snapshot+0x1040/0x1190 [btrfs]\\n   ? report_bug+0x171/0x1a0\\n   ? handle_bug+0x3a/0x70\\n   ? exc_invalid_op+0x17/0x70\\n   ? asm_exc_invalid_op+0x1a/0x20\\n   ? create_pending_snapshot+0x1040/0x1190 [btrfs]\\n   ? create_pending_snapshot+0x1040/0x1190 [btrfs]\\n   create_pending_snapshots+0x92/0xc0 [btrfs]\\n   btrfs_commit_transaction+0x66b/0xf40 [btrfs]\\n   btrfs_mksubvol+0x301/0x4d0 [btrfs]\\n   btrfs_mksnapshot+0x80/0xb0 [btrfs]\\n   __btrfs_ioctl_snap_create+0x1c2/0x1d0 [btrfs]\\n   btrfs_ioctl_snap_create_v2+0xc4/0x150 [btrfs]\\n   btrfs_ioctl+0x8a6/0x2650 [btrfs]\\n   ? kmem_cache_free+0x22/0x340\\n   ? do_sys_openat2+0x97/0xe0\\n   __x64_sys_ioctl+0x97/0xd0\\n   do_syscall_64+0x46/0xf0\\n   entry_SYSCALL_64_after_hwframe+0x6e/0x76\\n  RIP: 0033:0x7fe20abe83af\\n  RSP: 002b:00007ffe6eff1360 EFLAGS: 00000246 ORIG_RAX: 0000000000000010\\n  RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007fe20abe83af\\n  RDX: 00007ffe6eff23c0 RSI: 0000000050009417 RDI: 0000000000000003\\n  RBP: 0000000000000003 R08: 0000000000000000 R09: 00007fe20ad16cd0\\n  R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000\\n  R13: 00007ffe6eff13c0 R14: 00007fe20ad45000 R15: 0000559a120b6d58\\n   \u003c/TASK\u003e\\n  ---[ end trace 0000000000000000 ]---\\n  BTRFS: error (device vdc: state A) in create_pending_snapshot:1875: errno=-2 No such entry\\n  BTRFS info (device vdc: state EA): forced readonly\\n  BTRFS warning (device vdc: state EA): Skipping commit of aborted transaction.\\n  BTRFS: error (device vdc: state EA) in cleanup_transaction:2055: errno=-2 No such entry\\n\\nThis happens because create_pending_snapshot() initializes the new root\\nitem as a copy of the source root item. This includes the refs field,\\nwhich is 0 for a deleted subvolume. The call to btrfs_insert_root()\\ntherefore inserts a root with refs == 0. btrfs_get_new_fs_root() then\\nfinds the root and returns -ENOENT if refs == 0, which causes\\ncreate_pending_snapshot() to abort.\\n\\nFix it by checking the source root\u0027s refs before attempting the\\nsnapshot, but after locking subvol_sem to avoid racing with deletion.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.296\", \"versionStartIncluding\": \"2.6.35\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.210\", \"versionStartIncluding\": \"2.6.35\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.149\", \"versionStartIncluding\": \"2.6.35\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.76\", \"versionStartIncluding\": \"2.6.35\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.15\", \"versionStartIncluding\": \"2.6.35\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.7.3\", \"versionStartIncluding\": \"2.6.35\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.8\", \"versionStartIncluding\": \"2.6.35\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-05-11T20:01:23.654Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-26644\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-05-11T20:01:23.654Z\", \"dateReserved\": \"2024-02-19T14:20:24.138Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-03-26T15:17:17.614Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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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.