CVE-2026-45957

kernel: rcu: Fix rcu_read_unlock() deadloop due to softirq

Loading…

Severity

Moderate

Red Hat Product Security

—

CVSS

Review impact separately from score.

Published · May 27, 2026

Updated · June 28, 2026

Description

A flaw was found in the Linux kernel's Read-Copy Update (RCU) mechanism. A missing recursion protection in the rcu_read_unlock() function can lead to an infinite loop, known as a deadloop, when a soft interrupt (softirq) is triggered. This issue can cause the system to become unresponsive, resulting in a Denial of Service (DoS).

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CWE-835 · Loop with Unreachable Exit Condition ('Infinite Loop')