CVE-2026-45905

kernel: xfrm: fix ip_rt_bug race in icmp_route_lookup reverse path

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Severity

Low

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · May 27, 2026

Updated · October 29, 2026

Description

A flaw was found in the Linux kernel's networking subsystem, specifically within the xfrm (IPsec) component. A race condition can occur during the processing of Internet Control Message Protocol (ICMP) error messages. This vulnerability allows a local attacker to trigger a kernel warning, which could lead to a system crash and result in 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-367 · Time-of-check Time-of-use (TOCTOU) Race Condition