CVE-2026-68264High· 7.8▾ TwilightIn 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_op…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 42.9 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.1%
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):
(cherry picked from commit 046045543e530605c441063535e7dca0075369a6)
Linux >= e8babb280b5ef904df54b3a90e5a7e3a9600c4a9 < be5c39730ab8f1dfe59983bf7d8e3705541d1feeLinux >= e8babb280b5ef904df54b3a90e5a7e3a9600c4a9 < 157b1e3384d7d37f59c0c2b2ff2af8f557db1daaLinux >= e8babb280b5ef904df54b3a90e5a7e3a9600c4a9 < 90e4fd331b980259c40118d05b89b0ec514e7c48Linux >= e8babb280b5ef904df54b3a90e5a7e3a9600c4a9 < 6384271ac1ac0099198d15df79212a19ebdb929dLinux 6.12Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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