CVE-2026-1991 libuvc UVC Descriptor device.c uvc_scan_streaming null pointer dereference
A local attacker can cause a denial of service via null pointer dereference in libuvc's UVC descriptor handler.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-1991?
CVE-2026-1991 is a medium-severity vulnerability in libuvc, published on 6 Feb 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A vulnerability was detected in libuvc up to 0.0.7. Affected is the function uvc_scan_streaming of the file src/device.c of the component UVC Descriptor Handler. The manipulation results in null pointer dereference. The attack needs to be approached locally. The exploit is now public and may be used. The project was informed of the problem early through an issue report but has not responded yet.
Which versions are affected by CVE-2026-1991?
It affects 1 product.
Products include Libuvc Libuvc.
How do I fix CVE-2026-1991?
No fix has been published for CVE-2026-1991 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-1991 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-1991 exists.
Sources
Also known as DEBIAN-CVE-2026-1991, GHSA-6rqp-5xh4-j422, UBUNTU-CVE-2026-1991.