CVSS 3.1
Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)
Атакува се
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: drm/xe/pt: Reset current_op in xe_pt_update_ops_init() xe_pt_update_ops_init() fails to reset current_op to 0. On the vm_bind path, ops_execute() calls xe_pt_update_ops_prepare() inside the xe_validation_guard() / drm_exec_until_all_locked() loop. When that loop retries due to lock contention or OOM eviction (drm_exec_retry_on_contention() / xe_validation_retry_on_oom()), xe_pt_update_ops_prepare() runs again on the same vops, and each call to bind_op_prepare() increments current_op without resetting it. After N retries current_op exceeds the array size allocated by xe_vma_ops_alloc(), causing an out-of-bounds write into SLUB-poisoned memory and a subsequent UAF crash in xe_migrate_update_pgtables_cpu() when reading the corrupted pt_op->bind. Also reset needs_svm_lock and needs_invalidation which are derived in the same prepare pass and would otherwise cause wrong migrate ops selection and redundant TLB invalidation on retry. Fix this by resetting current_op, needs_svm_lock and needs_invalidation in xe_pt_update_ops_init(). v2 (Matt): - Add details in commit message. - Add Fixes tag and Cc to [email protected] (cherry picked from commit 046045543e530605c441063535e7dca0075369a6)
Засегнати продукти
- Linux Linux: e8babb280b5ef904df54b3a90e5a7e3a9600c4a9 преди be5c39730ab8f1dfe59983bf7d8e3705541d1fee; e8babb280b5ef904df54b3a90e5a7e3a9600c4a9 преди 157b1e3384d7d37f59c0c2b2ff2af8f557db1daa; e8babb280b5ef904df54b3a90e5a7e3a9600c4a9 преди 90e4fd331b980259c40118d05b89b0ec514e7c48; e8babb280b5ef904df54b3a90e5a7e3a9600c4a9 преди 6384271ac1ac0099198d15df79212a19ebdb929d
- Linux Linux: 6.12; преди 6.12; 6.12.103 до 6.12.*; 6.18.44 до 6.18.*; 7.1.6 до 7.1.*; от 7.2 нататък
Вид слабост
История
- 10 август 2026 Публикувано
Други уязвимости в Linux Linux
Първоизточници
- https://www.cve.org/CVERecord?id=CVE-2026-68264
- https://nvd.nist.gov/vuln/detail/CVE-2026-68264
- https://git.kernel.org/stable/c/be5c39730ab8f1dfe59983bf7d8e3705541d1fee
- https://git.kernel.org/stable/c/157b1e3384d7d37f59c0c2b2ff2af8f557db1daa
- https://git.kernel.org/stable/c/90e4fd331b980259c40118d05b89b0ec514e7c48
- https://git.kernel.org/stable/c/6384271ac1ac0099198d15df79212a19ebdb929d