Race condition in Linux kernel - CVE-2026-74440
Published: August 16, 2026
Vulnerability identifier: #VU143338
CSH Severity: Low
CVSS v4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-74440
CWE-ID: CWE-362
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to read or write memory being moved.
The vulnerability exists due to a race condition in xe_exec_ioctl() when scheduling user jobs that use external buffer objects mapped by the VM without waiting on their dma-resv KERNEL fences. A local user can submit a job using an external buffer object while a kernel operation on that buffer object is still in flight to read or write memory being moved.
Long-running mode is excluded from this behavior.
Affected software
Linux kernel
Debian Linux
linux (Debian package)
Debian Linux
linux (Debian package)
How to mitigate CVE-2026-74440
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