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CVE-2026-74398: 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: ipv6: addrconf: bail out of dad_failure when state is no longer POSTDAD addrconf_dad_failure() transitions ifp->state from DAD to POSTDAD via addrconf_dad_end(), which drops ifp->lock on return. The lock is re-acquired after net_info_ratelimited(). A concurrent ipv6_del_addr() can take the lock in that window, set ifp->state to DEAD and run list_del_rcu(&ifp->if_list). addrconf_dad_failure() then overwrites DEAD with ERRDAD at errdad: and schedules a new dad_work. The work calls ipv6_del_addr() again, hitting the already-poisoned list entry: general protection fault: 0000 [#1] SMP NOPTI CPU: 4 PID: 217 Comm: kworker/4:1 Workqueue: ipv6_addrconf addrconf_dad_work RIP: 0010:ipv6_del_addr+0xe9/0x280 RAX: dead000000000122 Call Trace: addrconf_dad_stop+0x113/0x140 addrconf_dad_work+0x28c/0x430 process_one_work+0x1eb/0x3b0 worker_thread+0x4d/0x400 kthread+0x104/0x140 ret_from_fork+0x35/0x40 Fold the addrconf_dad_end() logic into addrconf_dad_failure() under a single ifp->lock critical section. The STABLE_PRIVACY branch temporarily drops ifp->lock around address regeneration, so at lock_errdad: verify the state is still POSTDAD before transitioning to ERRDAD; bail out otherwise to avoid overwriting a state set by another path while the lock was released.

Засегнати продукти

  • Linux Linux: c15b1ccadb323ea50023e8f1cca2954129a62b51 преди 47b05836705b63dab93d9ac7c69a3a507375ef80; c15b1ccadb323ea50023e8f1cca2954129a62b51 преди d21be7d051012c6b572fa4e3334443c250216f7b; c15b1ccadb323ea50023e8f1cca2954129a62b51 преди 875c284c0f98b042bb97abad460f63a24c977f88; c15b1ccadb323ea50023e8f1cca2954129a62b51 преди 8ed0ce9ea58d677d1bac92614ee5f60f8ea57363; c15b1ccadb323ea50023e8f1cca2954129a62b51 преди 3bdc86d89fd6c6523753fa6f42fcfaf30ee699cb; c15b1ccadb323ea50023e8f1cca2954129a62b51 преди b61af0268e3d1308c466bf0be5dced844eafc1ef; c15b1ccadb323ea50023e8f1cca2954129a62b51 преди e889aa99ad3ed48bb0ddcff6475b17542532d18b; c15b1ccadb323ea50023e8f1cca2954129a62b51 преди 627ac78f2741e2ebd2225e2e953b6964a8a9182f; 835b474b8f70fa68d68abffad37378e92f661802; 3.10.105 преди 3.11
  • Linux Linux: 3.14; преди 3.14; 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.*; от 7.2 нататък

История

  • 15 август 2026 Публикувано

Други уязвимости в Linux Linux

Първоизточници

CVE-2026-74398: Linux | freedomonline.bg