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CVE-2026-80521: Linux

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.

    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: af_unix: Unlink scc_entry in unix_del_edge(). Kyle Zeng reported that GC could free a dead SCC partially. The scenario is as follows: 1) Create two SCCs: X -. A <-> B ^--' 2) Run the following concurrently: 2-1) send() sk-B to sk-B from sk-X 2-2) close() both A and B At 2-1), there is a small window where unix_add_edges() publishes a new edge (B <-> B) to GC but its skb is not queued by skb_queue_tail(). If 2-2) completes before skb_queue_tail() and GC is triggered, it judges A <-> B as dead, but B is not freed because GC cannot collect the not-yet-queued skb holding the B <-> B edge. X -. A <-> B -. This edge is visible ^--' ^..' but skb is not This itself is not a problem since the next GC run will judge B as dead as well and free it finally. X -. A <.> B -. ^--' ^--' However, X's SCC forces the next GC to call unix_walk_scc_fast(), and it iterates over A through B's scc_entry. Let's unlink scc_entry before freeing the vertex in unix_del_edge().

    Засегнати продукти

    • Linux Linux: 5dfd283f4651d04dbb70ceb9ae5c4a30eda3c52a преди 2b6c2842692d08e7acaf32d1eb47f95def35f3fe; de7921631ff323369aa63a4324695ab54ea4047e преди 6fda5c51b8e43a8440f76e65c89d9f95ddb2ef33; 4090fa373f0e763c43610853d2774b5979915959 преди 1293fd69a50d188a5788b08ba3741a3e86be1608; 4090fa373f0e763c43610853d2774b5979915959 преди fe198b077864feafd4aa4b33b1a5ce26f50195a2; 4090fa373f0e763c43610853d2774b5979915959 преди e3702470ced94fad74d71e2232f022d2eb752a6d; 4090fa373f0e763c43610853d2774b5979915959 преди 594d905195024b228c962627ae5ae7c17bd582a4; 6.1.141 преди 6.1.189; 6.6.93 преди 6.6.158
    • Linux Linux: 6.10; преди 6.10; 6.1.189 до 6.1.*; 6.6.158 до 6.6.*; 6.12.111 до 6.12.*; 6.18.53 до 6.18.*; 7.1.10 до 7.1.*; 7.2 до *

    История

    • 26 август 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-80521: Linux | freedomonline.bg