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CVE-2026-31505: Linux, грешка в паметта

7.8

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 локално, без особени условия, с обикновен потребителски вход и без действие от потребителя.

CVE радар: още уязвимости от този вид

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

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: iavf: fix out-of-bounds writes in iavf_get_ethtool_stats() iavf incorrectly uses real_num_tx_queues for ETH_SS_STATS. Since the value could change in runtime, we should use num_tx_queues instead. Moreover iavf_get_ethtool_stats() uses num_active_queues while iavf_get_sset_count() and iavf_get_stat_strings() use real_num_tx_queues, which triggers out-of-bounds writes when we do "ethtool -L" and "ethtool -S" simultaneously [1]. For example when we change channels from 1 to 8, Thread 3 could be scheduled before Thread 2, and out-of-bounds writes could be triggered in Thread 3: Thread 1 (ethtool -L) Thread 2 (work) Thread 3 (ethtool -S) iavf_set_channels() ... iavf_alloc_queues() -> num_active_queues = 8 iavf_schedule_finish_config() iavf_get_sset_count() real_num_tx_queues: 1 -> buffer for 1 queue iavf_get_ethtool_stats() num_active_queues: 8 -> out-of-bounds! iavf_finish_config() -> real_num_tx_queues = 8 Use immutable num_tx_queues in all related functions to avoid the issue. [1] BUG: KASAN: vmalloc-out-of-bounds in iavf_add_one_ethtool_stat+0x200/0x270 Write of size 8 at addr ffffc900031c9080 by task ethtool/5800 CPU: 1 UID: 0 PID: 5800 Comm: ethtool Not tainted 6.19.0-enjuk-08403-g8137e3db7f1c #241 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 Call Trace: <TASK> dump_stack_lvl+0x6f/0xb0 print_report+0x170/0x4f3 kasan_report+0xe1/0x180 iavf_add_one_ethtool_stat+0x200/0x270 iavf_get_ethtool_stats+0x14c/0x2e0 __dev_ethtool+0x3d0c/0x5830 dev_ethtoo

Засегнати продукти

  • Linux Linux: 64430f70ba6fcd5872ac190f4ae3ddee3f48f00d преди 20a31b84b3e3af21bbb2628fdad185b1f274a5f5; 64430f70ba6fcd5872ac190f4ae3ddee3f48f00d преди d5dcca707f56c46582486d783c1eca2323189111; 64430f70ba6fcd5872ac190f4ae3ddee3f48f00d преди 1f931dee5b726df1940348ec31614d64bac03aa6; 64430f70ba6fcd5872ac190f4ae3ddee3f48f00d преди bb85741d2dc2be207353a412f51b83697fcbefcf; 64430f70ba6fcd5872ac190f4ae3ddee3f48f00d преди fdf902bf86a80bf15792a1d20a67a5302498d7f1; 64430f70ba6fcd5872ac190f4ae3ddee3f48f00d преди fecacfc95f195b99c71c579a472120d0b4ed65fa
  • Linux Linux: 5.17; преди 5.17; 6.1.191 до 6.1.*; 6.6.160 до 6.6.*; 6.12.80 до 6.12.*; 6.18.21 до 6.18.*; 6.19.11 до 6.19.*; 7.0 до *

Вид слабост

История

  • 22 април 2026 Публикувано

Други уязвимости в Linux Linux

Първоизточници

CVE-2026-31505: Linux, грешка в паметта | freedomonline.bg