CVE-2026-99000
kernel: drm/xe: Fix shrinker accounting double-subtraction on nested external pins
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · October 23, 2026
Updated · October 29, 2026
Description
A flaw was found in the Linux kernel's drm/xe graphics driver. A local user can trigger a Denial of Service (DoS) by pinning and unpinning shared buffer objects repeatedly. Improper tracking of nested pin operations causes memory accounting counters to underflow, misleading the system into reporting an enormous number of purgeable memory pages. Under memory pressure, this flaw forces the kernel's memory management subsystem to run excessively, leading to severe resource exhaustion and system unresponsiveness.
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 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-191 · Integer Underflow (Wrap or Wraparound)