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CVE-2026-74384: Linux

9.8

CVSS 3.1

Няма данни

Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

Няма потвърждение

Атакува се

Няма данни

Време до експлоатация

Атакува се по мрежата, без особени условия, без вход и без действие от потребителя.

  • Експлоатация: няма данни за експлоатация
  • Атаката може да се автоматизира

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: nvme-multipath: fix flex array size in struct nvme_ns_head struct nvme_ns_head contains a flexible array member, current_path[], which is indexed using the NUMA node ID: head->current_path[numa_node_id()] The structure is currently allocated as: size = sizeof(struct nvme_ns_head) + (num_possible_nodes() * sizeof(struct nvme_ns *)); head = kzalloc(size, GFP_KERNEL); This allocation assumes that NUMA node IDs are sequential and densely packed from 0 .. num_possible_nodes() - 1. While this assumption holds on many systems, it is not always true on some architectures such as powerpc. On some powerpc systems, NUMA node IDs can be sparse. For example: NUMA: NUMA node(s): 6 NUMA node0 CPU(s): 80-159 NUMA node8 CPU(s): 0-79 NUMA node252 CPU(s): NUMA node253 CPU(s): NUMA node254 CPU(s): NUMA node255 CPU(s): That is, the possible/online NUMA node IDs are: 0, 8, 252, 253, 254, 255 In this case: num_possible_nodes() = 6 So memory is allocated for only 6 entries in current_path[]. However, the array is later indexed using the actual NUMA node ID. As a result, accesses such as: head->current_path[8] or head->current_path[252] goes out of bounds, leading to the following KASAN splat: ================================================================== BUG: KASAN: slab-out-of-bounds in nvme_mpath_revalidate_paths+0x22c/0x290 [nvme_core] Write of size 8 at addr c00020003bda35b8 by task kworker/u641:2/1997 CPU: 1 UID: 0 PID: 1997 Comm: kworker/u641:2 Not tainted 7.1.0-rc5-dirty #14 PREEMPT(lazy) Hardware name: 8335-GTH POWER9 0x4e1202 opal:skiboot-v6.5.3-35-g1851b2a06 PowerNV Workqueue: async async_run_entry_fn Call Trace: [c000200037fa7510] [c0000000021c23d4] dump_stack_lvl+0x88/0xdc (unreliable) [c000200037fa7540] [c0000000009fda90] print_report+0x22c/0x67c [c000200037fa7630] [c0000000009fd508] kasan_report+0x108/0x220 [c000200037fa7740] [c0000000009fff48] __

Засегнати продукти

  • Linux Linux: f333444708f82c4a4d3ccac004da0bfd9cfdfa42 преди 7e7b167e65610dfa7564d449474f4b477f9d4c1c; f333444708f82c4a4d3ccac004da0bfd9cfdfa42 преди 316b5f1168264844aa125959de1d6da2b1905795; f333444708f82c4a4d3ccac004da0bfd9cfdfa42 преди 1d4131b5c9823c7d2c86389898ad1b466af7df5e; f333444708f82c4a4d3ccac004da0bfd9cfdfa42 преди 9ffdd11bd6c961b46b3689850ff6c5d7af5c5fe5; f333444708f82c4a4d3ccac004da0bfd9cfdfa42 преди bde4d6eb53f7d3cdae7e62c9ee84345fdd6e70a6; f333444708f82c4a4d3ccac004da0bfd9cfdfa42 преди 140d6fff4ed266592492a23444043842b4af7a62; f333444708f82c4a4d3ccac004da0bfd9cfdfa42 преди 7173a741fed73de6247384056fe92e582ba12507; f333444708f82c4a4d3ccac004da0bfd9cfdfa42 преди 001e57554de81aa79c25c18fd53911d8a415c304
  • Linux Linux: 4.20; преди 4.20; 5.10.261 до 5.10.*; 5.15.212 до 5.15.*; 6.1.178 до 6.1.*; 6.6.145 до 6.6.*; 6.12.97 до 6.12.*; 6.18.40 до 6.18.*; 7.1.5 до 7.1.*; от 7.2 нататък

История

  • 15 август 2026 Публикувано

Други уязвимости в Linux Linux

Първоизточници

CVE-2026-74384: Linux | freedomonline.bg