Vulnerability Description
The kernel handler for IPV6_MSFILTER dropped a serializing lock in order to copy the source-filter list from userspace, then reacquired the lock. During this window another thread could free the multicast filter structure, leaving the handler with a stale pointer to freed memory. An unprivileged local user can exploit this use-after-free to escalate privileges.
Related Weaknesses (CWE)
References
FAQ
What is CVE-2026-49412?
CVE-2026-49412 is a documented vulnerability. The kernel handler for IPV6_MSFILTER dropped a serializing lock in order to copy the source-filter list from userspace, then reacquired the lock. During this window another thread could free the mult...
How severe is CVE-2026-49412?
CVSS scoring is not yet available for CVE-2026-49412. Check NVD for updates.
Is there a patch for CVE-2026-49412?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.