CVE-2024-26644

{"id": "CVE-2024-26644", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 1.8}]}, "published": "2024-03-26T16:15:12.137", "references": [{"url": "https://git.kernel.org/stable/c/0877497dc97834728e1b528ddf1e1c484292c29c", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/2bdf872bcfe629a6202ffd6641615a8ed00e8464", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/6e6bca99e8d88d989a7cde4c064abea552d5219b", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/7081929ab2572920e94d70be3d332e5c9f97095a", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/d8680b722f0ff6d7a01ddacc1844e0d52354d6ff", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/ec794a7528199e1be6d47bec03f4755aa75df256", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/0877497dc97834728e1b528ddf1e1c484292c29c", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/2bdf872bcfe629a6202ffd6641615a8ed00e8464", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/6e6bca99e8d88d989a7cde4c064abea552d5219b", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/7081929ab2572920e94d70be3d332e5c9f97095a", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/d8680b722f0ff6d7a01ddacc1844e0d52354d6ff", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/ec794a7528199e1be6d47bec03f4755aa75df256", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html", "tags": ["Mailing List"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-908"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: don't 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 <TASK>\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 </TASK>\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's 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: &lt; TAREA&gt; ? 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."}], "lastModified": "2025-03-17T15:20:20.027", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "24443040-F8E0-445D-8395-40A94214526C", "versionEndExcluding": "5.10.210"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "0D0465BB-4053-4E15-9137-6696EBAE90FD", "versionEndExcluding": "5.15.149", "versionStartIncluding": "5.11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "32F0FEB3-5FE1-4400-A56D-886F09BE872E", "versionEndExcluding": "6.1.76", "versionStartIncluding": "5.16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "87C718CB-AE3D-4B07-B4D9-BFF64183C468", "versionEndExcluding": "6.6.15", "versionStartIncluding": "6.2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "58FD5308-148A-40D3-B36A-0CA6B434A8BF", "versionEndExcluding": "6.7.3", "versionStartIncluding": "6.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.8:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "B9F4EA73-0894-400F-A490-3A397AB7A517"}], "operator": "OR"}]}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "07B237A9-69A3-4A9C-9DA0-4E06BD37AE73"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}