CVE-2025-15571 ckolivas lrzip stream.c ucompthread null pointer dereference
A local attacker can cause a denial of service via null pointer dereference in lrzip's ucompthread function.
- 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-2025-15571?
CVE-2025-15571 is a medium-severity vulnerability in ckolivas lrzip, published on 10 Feb 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
A security vulnerability has been detected in ckolivas lrzip up to 0.651. This vulnerability affects the function ucompthread of the file stream.c. Such manipulation leads to null pointer dereference. The attack can only be performed from a local environment. The exploit has been disclosed publicly 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-2025-15571?
It affects 1 product.
Products include Ckolivas Lrzip.
How do I fix CVE-2025-15571?
No fix published yet.
Is CVE-2025-15571 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-15571 exists.
Other vulnerabilities in ckolivas lrzip
Sources
Also known as DEBIAN-CVE-2025-15571, GHSA-x954-5gxx-h6v4, UBUNTU-CVE-2025-15571.