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CVE-2026-74255: Linux

9.8

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 по мрежата, без особени условия, без вход и без действие от потребителя.

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

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: tipc: fix UAF in tipc_l2_send_msg() Syzbot reported a slab-use-after-free in ipvlan_hard_header() when called from tipc_l2_send_msg(). The root cause is that tipc_disable_l2_media() calls synchronize_net() while b->media_ptr is still valid. This allows concurrent RCU readers to obtain the device pointer after synchronize_net() has finished. The pointer is cleared later in bearer_disable(), but without any subsequent synchronization, allowing the device to be freed while still in use by readers. Fix this by clearing b->media_ptr in tipc_disable_l2_media() before calling synchronize_net(). This is safe to do now because the call order in bearer_disable() was reversed in 0d051bf93c06 ("tipc: make bearer packet filtering generic") to call tipc_node_delete_links() (which needs the pointer) before disable_media(). https: //lore.kernel.org/netdev/[email protected]/T/#u

Засегнати продукти

  • Linux Linux: 282b3a056225b35024246f63feb91d769d714dad преди 609ced2301be1df7e7ed2ef47d1d916674e6ba3b; 282b3a056225b35024246f63feb91d769d714dad преди 71aafa16d79b107b33837f60b6cbc7d0cb8c5708; 282b3a056225b35024246f63feb91d769d714dad преди f4002f1c669cc02e3763f479fc25ff1dfa9e2420; 282b3a056225b35024246f63feb91d769d714dad преди 50ff092633b06382e5091dd5b093ce943d4ac2f9; 282b3a056225b35024246f63feb91d769d714dad преди aef12b5ce793dea6b3a97a58fd0f946000ae8945; 282b3a056225b35024246f63feb91d769d714dad преди 0d8a12d7143126afdf9fbe2e3d438650dd6603ed; 282b3a056225b35024246f63feb91d769d714dad преди 35e0297a93c3c34a3924eeef816c03504e3ab5c5; 282b3a056225b35024246f63feb91d769d714dad преди f4c3d89fc986b0da196ddfc6cfe0ea5d5d08bec6
  • Linux Linux: 4.4; преди 4.4; 5.10.261 до 5.10.*; 5.15.212 до 5.15.*; 6.1.178 до 6.1.*; 6.6.145 до 6.6.*; 6.12.97 до 6.12.*; 6.18.40 до 6.18.*; 7.1.5 до 7.1.*; 7.2 до *

История

  • 15 август 2026 Публикувано

Други уязвимости в Linux Linux

Първоизточници

CVE-2026-74255: Linux | freedomonline.bg