CVE-2026-98881
kernel: net: bridge: remove stale rcu_barrier() in br_multicast_dev_del()
Severity
ModerateRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · October 23, 2026
Updated · October 26, 2026
Description
A flaw was found in the Linux kernel's bridge networking subsystem. An obsolete synchronization call during the deletion of bridge multicast devices causes severe lock contention within the networking layer. A local user could exploit this flaw by repeatedly creating and removing network bridge devices, causing kernel tasks to stall and resulting 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 · 5.5CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-821 · Incorrect Synchronization