CVE-2026-80992 net: ravb: avoid dereferencing an invalid PTP clock
A null pointer dereference in the Linux kernel's ravb network driver can cause a system crash when querying PTP clock information before initialization.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-80992?
CVE-2026-80992 is a high-severity vulnerability in Linux, published on 11 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
net: ravb: avoid dereferencing an invalid PTP clock
The PTP clock is unavailable before the first open, so querying its index can dereference a NULL pointer. Registration failures can also leave an error pointer in priv->ptp.clock.
Cache the PHC index separately and report -1 while no clock is registered. Normalize registration errors to NULL and preserve the static timestamping capabilities.
Which versions are affected by CVE-2026-80992?
How do I fix CVE-2026-80992?
Apply the vendor's patch.
Is CVE-2026-80992 being exploited?
There is no known exploitation of CVE-2026-80992 in the wild and no public exploit code.
Sources
Also known as AZL-100793, BELL-CVE-2026-80992, DEBIAN-CVE-2026-80992, GHSA-j5jh-54qw-942f, UBUNTU-CVE-2026-80992.