Към съдържанието

CVE-2026-89564: 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.

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

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: ip: orphan prefetched skbs before multicast forwarding IPv4 and IPv6 input preserve an skb->sk association installed by bpf_sk_assign() so that local delivery can use the selected socket under RCU. Both address families can also prefetch a socket in UDP early demux. In both paths (BPF and UDP early demux) a reference is not guaranteed to be held on the socket. When a multicast packet is not locally deliverable, IPv6 hands the original skb to ip6_mr_input(). IPv4's ip_mr_input() similarly keeps the original skb when local delivery is not needed. Either path can put the skb on an unresolved multicast route queue or forward it after the receive-side RCU section ends. After the prefetched socket is destroyed, a later skb free invokes sock_pfree() and dereferences the stale skb->sk. Orphan the skb before each non-local multicast forwarding path. Local delivery retains the original skb; the existing skb_clone() calls provide multicast forwarding with a socket-free clone.

Засегнати продукти

  • Linux Linux: cf7fbe660f2dbd738ab58aea8e9b0ca6ad232449 преди 592b91f41d4f35e37c9e0be1c46a4c28437642cd; cf7fbe660f2dbd738ab58aea8e9b0ca6ad232449 преди 882212d317a7c16ab70d20656f6b1c42abada9f6; cf7fbe660f2dbd738ab58aea8e9b0ca6ad232449 преди e62aef7d6a5b27569bf540bbe11a9482117ff588; cf7fbe660f2dbd738ab58aea8e9b0ca6ad232449 преди a8af6fbac895f057c4b8ff8a2e3fb4c5827fe4ce; cf7fbe660f2dbd738ab58aea8e9b0ca6ad232449 преди f1281d4b99089fbaf0d3579bba62a814ebb4de4d; cf7fbe660f2dbd738ab58aea8e9b0ca6ad232449 преди e36ce6e78fe3fc3c071a26750783b7ba081ce10d
  • Linux Linux: 5.7; преди 5.7; 6.1.191 до 6.1.*; 6.6.160 до 6.6.*; 6.12.111 до 6.12.*; 6.18.50 до 6.18.*; 7.2.4 до 7.2.*; 7.3 до *

История

  • 11 септември 2026 Публикувано

Други уязвимости в Linux Linux

Първоизточници

CVE-2026-89564: Linux | freedomonline.bg