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CVE-2026-64575: Linux, грешка в паметта

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.

CVE радар: още уязвимости от този вид

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

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: bpf: tcp: fix double sock release on batch realloc bpf_iter_tcp_batch() releases the current batch via bpf_iter_tcp_put_batch(), which drops the socket refs and rewrites each slot with the socket cookie, then grows the batch. cur_sk/end_sk are kept for bpf_iter_tcp_resume(), but on realloc failure the function returns ERR_PTR() before resume runs, leaving cur_sk < end_sk over slots that now hold cookies rather than sock pointers. bpf_iter_tcp_seq_stop() then calls bpf_iter_tcp_put_batch() again and dereferences a cookie as a struct sock. Empty the batch on the failure path so stop() does not release it again. The sockets were already freed by the first bpf_iter_tcp_put_batch(), so nothing leaks, and a later read() rescans the bucket from the start instead of skipping it. The sibling GFP_NOWAIT failure path still holds real socket references and is left for stop() to release. BUG: KASAN: null-ptr-deref in __sock_gen_cookie Read of size 8 at addr 0000000000000059 by task exploit ... __sock_gen_cookie (net/core/sock_diag.c:28) bpf_iter_tcp_put_batch (net/ipv4/tcp_ipv4.c:2918) bpf_iter_tcp_seq_stop (net/ipv4/tcp_ipv4.c:3270) bpf_seq_read (kernel/bpf/bpf_iter.c:205) vfs_read (fs/read_write.c:572) ksys_read (fs/read_write.c:716) do_syscall_64 entry_SYSCALL_64_after_hwframe Kernel panic - not syncing: Fatal exception

Засегнати продукти

  • Linux Linux: 9794ac757a650dd594391192183c9caf939f8223 преди c842882e4c5d2818b858d6baf3fd10958c93f729; 1d7a82c1df5fc397eaca9c6b8c8f61aae9866ad4 преди 7a6a6d2a127866935f87b55b557bc89693065462; 36f955807ee4ede07e9410772f792e4cb4ec807b преди f0c1810320b0dac228103fad7311e89532134d83; cdec67a489d4fdae3e83e04fca0419136a83c4c2 преди 9f27c4f0ae35b5390ce4f7a54d3501144e41a54d; cdec67a489d4fdae3e83e04fca0419136a83c4c2 преди 8a726e9585ffe7bfbfad2b5279277a00973970f3; cdec67a489d4fdae3e83e04fca0419136a83c4c2 преди 980a813452754f8001704744e92f7aa697c53dd3
  • Linux Linux: 6.17; преди 6.17; 6.18.42 до 6.18.*; 7.1.6 до 7.1.*; от 7.2 нататък

Вид слабост

История

  • 5 август 2026 Публикувано

Други уязвимости в Linux Linux

Първоизточници

CVE-2026-64575: Linux, грешка в паметта | freedomonline.bg