Race condition in Linux kernel - CVE-2026-98099
Published: September 28, 2026
Vulnerability identifier: #VU152362
CSH Severity: Low
CVSS v4: 0 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-98099
CWE-ID: CWE-362
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to trigger a race condition.
The vulnerability exists due to improper synchronization in IPv6 multicast RCU-protected list management in net/ipv6/mcast.c when concurrently modifying IPv6 multicast group memberships while lockless readers traverse the lists. A local user can modify IPv6 multicast group memberships concurrently with list traversal to trigger a race condition.
Affected software
Linux kernel
How to mitigate CVE-2026-98099
Install security update from vendor's repository.
Linux kernel - update to 7.0 rc3