CVE-2026-89950: Linux

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: batman-adv: mcast: linearize skbuff for packet generation batadv_mcast_forw_packet() and batadv_mcast_forw_scrape() is not only called (indirectly) by the unsharing+linearizing batadv_recv_mcast_packet() handler. When it is called (indirectly) by batadv_mcast_forw_mcsend() then it will be unshared but not linearized. The SKB_LINEAR_ASSERT() can therefore cause a fatal BUG(). The linearization should happen during the expansion of the head because the scrape function can be hit already during the initial batadv_mcast_forw_mode() selection code: * batadv_interface_tx * batadv_mcast_forw_mode * batadv_mcast_forw_mode_by_count() * batadv_mcast_forw_push() -> calls batadv_mcast_forw_expand_head() before everything else * batadv_mcast_forw_push_tvlvs() * batadv_mcast_forw_push_dests() * batadv_mcast_forw_push_adjust_padding() * batadv_mcast_forw_scrape()

Засегнати продукти

• Linux Linux: 90039133221e33964ccb4a536dad7eb0a372fff7 преди a9603e0a7cb5e0cddc6b23af153cf7daafc5c55e; 90039133221e33964ccb4a536dad7eb0a372fff7 преди c32e5e25c41201c8c3b796a4ab2c45103187091e; 90039133221e33964ccb4a536dad7eb0a372fff7 преди 2879177539e3ece483a8e5406970373698e9a6c5; 90039133221e33964ccb4a536dad7eb0a372fff7 преди 6a30a59e2660afd03c975f1b8eae6a2301161197
• Linux Linux: 6.8; преди 6.8; 6.12.110 до 6.12.*; 6.18.51 до 6.18.*; 7.2.5 до 7.2.*; от 7.3 нататък

История

Други уязвимости в Linux Linux

• 8.1CVE-2026-99270
• 7.8CVE-2026-99269
• CVE-2026-99268
• CVE-2026-99266
• CVE-2026-99267

Първоизточници

• https://www.cve.org/CVERecord?id=CVE-2026-89950
• https://nvd.nist.gov/vuln/detail/CVE-2026-89950
• https://git.kernel.org/stable/c/a9603e0a7cb5e0cddc6b23af153cf7daafc5c55e
• https://git.kernel.org/stable/c/c32e5e25c41201c8c3b796a4ab2c45103187091e
• https://git.kernel.org/stable/c/2879177539e3ece483a8e5406970373698e9a6c5
• https://git.kernel.org/stable/c/6a30a59e2660afd03c975f1b8eae6a2301161197