Out-of-bounds write in Linux kernel - CVE-2026-68264
Published: August 12, 2026
Vulnerability identifier: #VU142041
CSH Severity: Low
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-68264
CWE-ID: CWE-787
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to an out-of-bounds write in xe_pt_update_ops_init() and the vm_bind path in the xe driver when retrying page table update preparation after lock contention or OOM eviction. A local user can trigger repeated retries to cause a denial of service.
The issue can corrupt SLUB-poisoned memory and lead to a subsequent use-after-free crash in xe_migrate_update_pgtables_cpu().
Affected software
Linux kernel
Debian Linux
linux (Debian package)
Debian Linux
linux (Debian package)
How to mitigate CVE-2026-68264
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3
linux (Debian package) - update to 6.12.105-1
linux (Debian package) - update to 6.12.105-1