CVE-2026-98939
kernel: kernel: Denial of Service via circular locking dependency during page freeing
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · October 23, 2026
Updated · October 30, 2026
Description
A flaw was found in the Linux kernel's x86 memory management subsystem. Under memory pressure on systems with discrete graphics processing units (GPUs), a circular locking dependency can occur between memory reclamation and page table freeing routines. A local user could exploit this flaw to cause a kernel deadlock, resulting in a system freeze and Denial of Service (DoS).
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
No mitigation is specified in collected source.
CVSS / CWE
CVSS 3.1 · 4.7CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-833 · Deadlock