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CVE-2026-74563: 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: rds: tcp: hold the RCU lock across ipv6_chk_addr() in rds_tcp_laddr_check() rds_tcp_laddr_check() looks up a scoped IPv6 interface with dev_get_by_index_rcu(), drops the RCU read-side lock, and only then passes the bare struct net_device * into ipv6_chk_addr(). dev_get_by_index_rcu() only keeps the device alive within the same RCU read-side section. After rcu_read_unlock(), a concurrent RTM_DELLINK can free the net_device; ipv6_chk_addr() then dereferences the stale pointer in __ipv6_chk_addr_and_flags() (e.g. l3mdev_master_dev_rcu(dev)), reading freed memory. Keep the RCU read-side lock held across the ipv6_chk_addr() call instead of dropping it right after the lookup, so the device cannot be freed while it is in use. BUG: KASAN: slab-use-after-free in __ipv6_chk_addr_and_flags (... net/ipv6/addrconf.c:1998) Read of size 8 at addr ffff8880106ec000 by task exploit/153 Call Trace: ... kasan_report (mm/kasan/report.c:595) __ipv6_chk_addr_and_flags (... net/ipv6/addrconf.c:1998) ipv6_chk_addr (net/ipv6/addrconf.c:2031 net/ipv6/addrconf.c:1972) rds_tcp_laddr_check (net/rds/tcp.c:370) rds_bind (net/rds/bind.c:248) __sys_bind (net/socket.c:1920) __x64_sys_bind (net/socket.c:1956) do_syscall_64 (arch/x86/entry/syscall_64.c:63) entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:121)

Засегнати продукти

  • Linux Linux: eee2fa6ab3225192d6d894c54a6fb02ac9efdff6 преди f8a8977af2134a1d91e5f9773cb7d9d53278c830; eee2fa6ab3225192d6d894c54a6fb02ac9efdff6 преди ba95bce5dfe6e2ef602a87e0557225f2934ccb5c; eee2fa6ab3225192d6d894c54a6fb02ac9efdff6 преди c4933624a6f416ecfcc31ab58d585da1207a0597; eee2fa6ab3225192d6d894c54a6fb02ac9efdff6 преди 76dd48886eeeb5fcf2b837d2f4c3d17eebeac9ef; eee2fa6ab3225192d6d894c54a6fb02ac9efdff6 преди f0d1fb05d70c8a561cd8d0473bcacafa2fc137ff; eee2fa6ab3225192d6d894c54a6fb02ac9efdff6 преди b1d480fce05f857dc438080cd8c9244b84a83494; eee2fa6ab3225192d6d894c54a6fb02ac9efdff6 преди 8398bc477d3cb3e2b018a5aaac2bec0f69acda30; eee2fa6ab3225192d6d894c54a6fb02ac9efdff6 преди 78f75d632f74b8de0f081a128588f7c37d0d1164
  • Linux Linux: 4.19; преди 4.19; 5.10.265 до 5.10.*; 5.15.216 до 5.15.*; 6.1.183 до 6.1.*; 6.6.151 до 6.6.*; 6.12.103 до 6.12.*; 6.18.44 до 6.18.*; 7.1.8 до 7.1.*; от 7.2 нататък

История

  • 15 август 2026 Публикувано

Други уязвимости в Linux Linux

Първоизточници

CVE-2026-74563: Linux | freedomonline.bg