CVE-2025-38544

kernel: Linux kernel: Denial of Service in rxrpc due to prealloc collision

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Severity

Moderate

Red Hat Product Security

5.5

CVSS 3.1

Review impact separately from score.

Published · August 16, 2025

Updated · June 30, 2026

Description

A flaw was found in the Linux kernel. A local user can exploit this vulnerability by attempting to preallocate a call with an already in-use call ID within the AF_RXRPC subsystem. This can lead to a denial of service (DoS) due to assertions being triggered during error handling, making the system unavailable.

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-413 · Improper Resource Locking