CVE-2025-21718
kernel: net: rose: fix timer races against user threads
Severity
ImportantRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · February 27, 2025
Updated · September 13, 2026
Description
A flaw was found in the Linux kernel's Rose network protocol. A race condition in the Rose timers, specifically when acquiring the socket spinlock without checking user thread ownership, can lead to a use-after-free vulnerability. This memory corruption issue could allow a local attacker to cause a denial of service or potentially execute arbitrary code.
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 · 7CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-416 · Use After Free