CVSS 3.1
Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)
Атакува се
Време до експлоатация
Атакува се локално, без особени условия, с обикновен потребителски 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: mt76: use kfree_rcu for offchannel link in mt76_put_vif_phy_link mt76_put_vif_phy_link() frees the offchannel mlink with plain kfree() after rcu_assign_pointer(NULL). However, rcu_assign_pointer only prevents future RCU readers from obtaining the pointer -- it does not wait for existing readers that already hold it via rcu_dereference. The TX datapath (e.g. mt7996_mac_write_txwi) dereferences mlink->wcid and mlink->idx under rcu_read_lock. If a TX softirq obtained the pointer via rcu_dereference just before the NULL assignment, it will dereference freed memory after the kfree. struct mt76_vif_link already contains an rcu_head field that is unused at this free site -- a developer oversight, since the adjacent kfree_rcu_mightsleep call for rx_sc in the same function shows the pattern was understood. Replace kfree(mlink) with kfree_rcu(mlink, rcu_head).
Засегнати продукти
- Linux Linux: a8f424c1287cc79a06c21816658feea87dfcb83f преди c7a83899203ed36696a2d35ddd03c0f522874a63; a8f424c1287cc79a06c21816658feea87dfcb83f преди 50e700ac0edce72dee5c3a9755865d9423696ac7; a8f424c1287cc79a06c21816658feea87dfcb83f преди 7fae097aa9a56c30febf539d72ef3773165d3aa3
- Linux Linux: 6.14; преди 6.14; 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
- https://www.cve.org/CVERecord?id=CVE-2026-74325
- https://nvd.nist.gov/vuln/detail/CVE-2026-74325
- https://git.kernel.org/stable/c/c7a83899203ed36696a2d35ddd03c0f522874a63
- https://git.kernel.org/stable/c/50e700ac0edce72dee5c3a9755865d9423696ac7
- https://git.kernel.org/stable/c/7fae097aa9a56c30febf539d72ef3773165d3aa3