CVE-2026-23374

kernel: blktrace: fix __this_cpu_read/write in preemptible context

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Severity

Low

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · March 25, 2026

Updated · June 28, 2026

Description

A flaw was found in the Linux kernel's blktrace component. This vulnerability arises when the tracing_record_cmdline() function attempts to access a per-CPU variable in a preemptible context, which is an unsafe operation. A local attacker could exploit this to trigger a kernel bug, potentially leading to system instability or a 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 · 5.5
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CWE-820 · Missing Synchronization