CVSS 3.1
Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)
Атакува се
Време до експлоатация
Атакува се по мрежата, без особени условия, без вход и без действие от потребителя.
Описание
Оригинално описание
In the Linux kernel, the following vulnerability has been resolved: perf tools: Use perf_env__get_cpu_topology() in machine__resolve() machine__resolve() accesses env->cpu[al->cpu].socket_id after checking al->cpu >= 0 and env->cpu != NULL, but without validating al->cpu against env->nr_cpus_avail. Since al->cpu comes from the untrusted perf.data sample, a crafted file with a large CPU index causes an out-of-bounds heap read. Use perf_env__get_cpu_topology() which validates both NULL and bounds. Also bounds-check al->cpu before the cast to struct perf_cpu (int16_t): without this, values like 65536 silently truncate to 0, bypassing the accessor's internal check and returning CPU 0's topology.
Засегнати продукти
- Linux Linux: 0c4c4debb0adda4c18c158d95031dc2b9f637869 преди b9e8406651dcc1c19238aad11861a758683525b4; 0c4c4debb0adda4c18c158d95031dc2b9f637869 преди eb266a14c16a93eb4db7b56a452d6be93f8bdcd4; 0c4c4debb0adda4c18c158d95031dc2b9f637869 преди 5484b43a0ec8231c36fba6ead654cb72dbba8b8f
- Linux Linux: 4.4; преди 4.4; 6.18.40 до 6.18.*; 7.1.5 до 7.1.*; 7.2 до *
История
- 28 август 2026 Публикувано
Други уязвимости в Linux Linux
Първоизточници
- https://www.cve.org/CVERecord?id=CVE-2026-80670
- https://nvd.nist.gov/vuln/detail/CVE-2026-80670
- https://git.kernel.org/stable/c/b9e8406651dcc1c19238aad11861a758683525b4
- https://git.kernel.org/stable/c/eb266a14c16a93eb4db7b56a452d6be93f8bdcd4
- https://git.kernel.org/stable/c/5484b43a0ec8231c36fba6ead654cb72dbba8b8f