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CVE-2026-97611: 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.

    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: net: openvswitch: fix use-after-free of the flow table mask array tbl_mask_array_realloc() retires the old mask_array before it stops being reachable: old = ovsl_dereference(tbl->mask_array); if (old) { ... call_rcu(&old->rcu, mask_array_rcu_cb); } rcu_assign_pointer(tbl->mask_array, new); call_rcu() only waits for read-side critical sections already in flight. tbl->mask_array still points at old between the call_rcu() and the rcu_assign_pointer(), so a reader entering ovs_flow_tbl_lookup_stats() in that window picks up old in a fresh critical section that the pending grace period does not cover. tbl_mask_array_realloc() runs in process context under ovs_mutex, so the window is preemptible and can outlast the grace period. Then mask_array_rcu_cb() frees old before the swap runs: BUG: KASAN: slab-use-after-free in flow_lookup.constprop.0+0x2bf/0x2f0 Read of size 8 at addr ffff888020b3e018 by task poc/741 flow_lookup.constprop.0+0x2bf/0x2f0 ovs_flow_tbl_lookup_stats+0x4a3/0x5c0 ovs_dp_process_packet+0x19c/0x710 ovs_vport_receive+0x243/0x390 internal_dev_xmit+0x81/0x170 Freed by task 728: kfree+0x16a/0x4e0 rcu_core+0x853/0x1030 Publish the new array before retiring the old one. The kfree_rcu() that call_rcu() replaced ran after the swap.

    Засегнати продукти

    • Linux Linux: eac87c413bf9794c14d488998a5265ea5b32f04e преди 4c98b492e9ed63f9ca3e23566d9a6a4f235944f4; eac87c413bf9794c14d488998a5265ea5b32f04e преди 4016ead17acd75312c066ecd47c4b7f0a81ceaa2; eac87c413bf9794c14d488998a5265ea5b32f04e преди 017dbbf0d6c319a487f68e22f56d91fc787d5525; eac87c413bf9794c14d488998a5265ea5b32f04e преди 76678217cdabc41e3c74c23b45b62086ffb8fe7a; eac87c413bf9794c14d488998a5265ea5b32f04e преди cd982e11684def5d4a9fcfd5354de09032828414; eac87c413bf9794c14d488998a5265ea5b32f04e преди a0d18d21d48a551f82ee344e50efb8a682161489; eac87c413bf9794c14d488998a5265ea5b32f04e преди 035e9c3722067648a99010711d0ce81f42572ef4; eac87c413bf9794c14d488998a5265ea5b32f04e преди ba4ba11ed6eb8972c69070417fc27b48deb002e8
    • Linux Linux: 5.9; преди 5.9; 5.10.271 до 5.10.*; 5.15.222 до 5.15.*; 6.1.189 до 6.1.*; 6.6.158 до 6.6.*; 6.12.111 до 6.12.*; 6.18.53 до 6.18.*; 7.2.7 до 7.2.*; 7.3 до *

    История

    • 25 септември 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-97611: Linux | freedomonline.bg