CVSS 3.1
Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)
Атакува се
Време до експлоатация
Атакува се от съседна мрежа, без особени условия, без вход и без действие от потребителя.
- Експлоатация: няма данни за експлоатация
- Атаката не може да се автоматизира
Описание
Оригинално описание
In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: defer link RX stats percpu free to RCU sta_remove_link() frees a removed MLO link's RX stats percpu buffer right away, but defers only the link container to RCU: sta_info_free_link(&alloc->info); kfree_rcu(alloc, rcu_head); The RX fast path reads link_sta under rcu_read_lock and writes the percpu stats. A reader that resolved link_sta before the removal keeps the pointer. The container stays alive from the kfree_rcu, so the read still works. But the percpu block it points to is already freed. This needs uses_rss. That is when pcpu_rx_stats exists. The full STA teardown frees the deflink stats only after synchronize_net(). The link removal path had no such barrier. The race is hard to win in practice, but the free should still wait for RCU. Free the link together with its data from a single RCU callback, so the percpu block is reclaimed only after readers drain.
Засегнати продукти
- Linux Linux: c71420db653aba30a234d1e4cf86dde376e604fa преди acd5931d5adf12f0163f83dc00320e7011f4da92; c71420db653aba30a234d1e4cf86dde376e604fa преди a5afc00280986063f1c355821544fabbb2a960f7; c71420db653aba30a234d1e4cf86dde376e604fa преди b679c1cffb2f3d0854b8b05ea9e909ad6489046f; c71420db653aba30a234d1e4cf86dde376e604fa преди 2aa1789880fa5e41049b0f6a74a4fc2fa1997610; c71420db653aba30a234d1e4cf86dde376e604fa преди a03fceae0c65b31ce31840dac5e26684ceecb65b; c71420db653aba30a234d1e4cf86dde376e604fa преди aa2eb62525188269cdd402a583b9a8ed94657ff0
- Linux Linux: 6.0; преди 6.0; 6.1.191 до 6.1.*; 6.6.160 до 6.6.*; 6.12.114 до 6.12.*; 6.18.42 до 6.18.*; 7.1.6 до 7.1.*; от 7.2 нататък
Вид слабост
История
- 10 август 2026 Публикувано
Други уязвимости в Linux Linux
Първоизточници
- https://www.cve.org/CVERecord?id=CVE-2026-68409
- https://nvd.nist.gov/vuln/detail/CVE-2026-68409
- https://git.kernel.org/stable/c/acd5931d5adf12f0163f83dc00320e7011f4da92
- https://git.kernel.org/stable/c/a5afc00280986063f1c355821544fabbb2a960f7
- https://git.kernel.org/stable/c/b679c1cffb2f3d0854b8b05ea9e909ad6489046f
- https://git.kernel.org/stable/c/2aa1789880fa5e41049b0f6a74a4fc2fa1997610
- https://git.kernel.org/stable/c/a03fceae0c65b31ce31840dac5e26684ceecb65b
- https://git.kernel.org/stable/c/aa2eb62525188269cdd402a583b9a8ed94657ff0