CVE-2026-97922
kernel: tracing: Free histogram var refs regardless of how often they are referenced
Severity
LowRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · September 25, 2026
Updated · September 30, 2026
Description
A flaw was found in the Linux kernel's tracing subsystem. This vulnerability allows a privileged local user to cause a Denial of Service (DoS) through memory exhaustion. By repeatedly creating and removing histogram event triggers that reference the same variable multiple times, the kernel fails to properly release allocated variable references. Over time, the resulting memory leak can deplete available system resources and degrade system stability.
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-772 · Missing Release of Resource after Effective Lifetime