https://vulnerability.circl.lu Contains only the most 10 recent entries. http://www.rssboard.org/rss-specification python-feedgen en Thu, 01 Oct 2026 16:27:33 +0000 https://vulnerability.circl.lu/vuln/cve-2026-68264 <p><strong>Affected:</strong> Linux</p> <p>In the Linux kernel, the following vulnerability has been resolved:</p> <p>drm/xe/pt: Reset current_op in xe_pt_update_ops_init()</p> <p>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.</p> <p>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-&gt;bind.</p> <p>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.</p> <p>Fix this by resetting current_op, needs_svm_lock and needs_invalidation in xe_pt_update_ops_init().</p> <p>v2 (Matt): - Add details in commit message. - Add Fixes tag and Cc to stable@vger.kernel.org</p> <p>(cherry picked from commit 046045543e530605c441063535e7dca0075369a6)</p> <p><strong>Affected:</strong> Linux</p> <p>In the Linux kernel, the following vulnerability has been resolved:</p> <p>drm/xe/pt: Reset current_op in xe_pt_update_ops_init()</p> <p>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.</p> <p>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-&gt;bind.</p> <p>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.</p> <p>Fix this by resetting current_op, needs_svm_lock and needs_invalidation in xe_pt_update_ops_init().</p> <p>v2 (Matt): - Add details in commit message. - Add Fixes tag and Cc to stable@vger.kernel.org</p> <p>(cherry picked from commit 046045543e530605c441063535e7dca0075369a6)</p> https://vulnerability.circl.lu/vuln/cve-2026-68264