Към съдържанието
Търсене

CVE-2026-90326: 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: blk-cgroup: fix race between policy activation and blkg destruction When switching an IO scheduler on a block device, blkcg_activate_policy() allocates blkg_policy_data (pd) for all blkgs attached to the queue. However, blkcg_activate_policy() may race with concurrent blkcg deletion, leading to use-after-free and memory leak issues. The use-after-free occurs in the following race: T1 (blkcg_activate_policy): - Successfully allocates pd for blkg1 (loop0->queue, blkcgA) - Fails to allocate pd for blkg2 (loop0->queue, blkcgB) - Enters the enomem rollback path to release blkg1 resources T2 (blkcg deletion): - blkcgA is deleted concurrently - blkg1 is freed via blkg_free_workfn() - blkg1->pd is freed T1 (continued): - Rollback path accesses blkg1->pd->online after pd is freed - Triggers use-after-free In addition, blkg_free_workfn() frees pd before removing the blkg from q->blkg_list. This allows blkcg_activate_policy() to allocate a new pd for a blkg that is being destroyed, leaving the newly allocated pd unreachable when the blkg is finally freed. Fix these races by extending blkcg_mutex coverage to serialize blkcg_activate_policy() rollback and blkg destruction, ensuring pd lifecycle is synchronized with blkg list visibility.

    Засегнати продукти

    • Linux Linux: 81c1188905f88b77743d1fdeeedfc8cb7b67787d преди b5dae1cd0d8368b4338430ff93403df67f0b8bcc; bfe46d2efe46c5c952f982e2ca94fe2ec5e58e2a преди 083b58373463a6e5ee60ecb135269348f68ad7df; f1c006f1c6850c14040f8337753a63119bba39b9 преди 17c18a0df70c2b89ff7fcd74622f1540e98d00fd; f1c006f1c6850c14040f8337753a63119bba39b9 преди 91062e3a9ed251726df4e20ff9a1113f1c8ded59; f1c006f1c6850c14040f8337753a63119bba39b9 преди ac34e655dffa74349d885a43d098115336f53842; f1c006f1c6850c14040f8337753a63119bba39b9 преди 2cf9f50a38c1839e549a08e22aa35e8d69e2c8fd; f1c006f1c6850c14040f8337753a63119bba39b9 преди 5313d4d41739b0cb63000747c97bb1217ac45f3e; 6.1.16 преди 6.1.17; 6.2.3 преди 6.2.4
    • Linux Linux: 6.3; преди 6.3; 6.1.17 до 6.1.*; 6.2.4 до 6.2.*; 6.6.160 до 6.6.*; 6.12.114 до 6.12.*; 6.18.52 до 6.18.*; 7.2.6 до 7.2.*; от 7.3 нататък

    История

    • 17 септември 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-90326: Linux | freedomonline.bg