CVE-2026-97921
kernel: tracing: Free histogram the field rejected for a bad modifier
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. When configuring event histogram triggers, specifying an unpermitted modifier for a value or variable fails to release previously allocated memory on error. A local user with tracing access can exploit this flaw by repeatedly submitting invalid triggers, leading to a memory leak and a potential Denial of Service (DoS) due to kernel memory exhaustion.
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