CVE-2026-49412
Use-after-free bug in the IPV6_MSFILTER socket option handler
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.
INFO
Published Date :
June 27, 2026, 9:02 a.m.
Last Modified :
June 27, 2026, 9:02 a.m.
Remotely Exploit :
No
Source :
freebsd
Affected Products
The following products are affected by CVE-2026-49412
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
Solution
- Update the kernel to a patched version.
- Apply necessary security updates.
- Rebuild the kernel with the fix.
- Restart the affected system.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-49412 vulnerability anywhere in the article.