CVE-2025-15570 ckolivas lrzip stream.c lzma_decompress_buf use after free
A local attacker can exploit a use-after-free flaw in lrzip's lzma_decompress_buf function to potentially execute arbitrary code or cause a denial of service.
- 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-2025-15570?
CVE-2025-15570 is a medium-severity use after free 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 vulnerability was found in ckolivas lrzip up to 0.651. This impacts the function lzma_decompress_buf of the file stream.c. Performing a manipulation results in use after free. Attacking locally is a requirement. The exploit has been made public and could 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-2025-15570?
It affects 1 product.
Products include Ckolivas Lrzip.
How do I fix CVE-2025-15570?
No fix published yet.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2025-15570 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-15570 exists.
Other vulnerabilities in ckolivas lrzip
Sources
Also known as DEBIAN-CVE-2025-15570, GHSA-6gcc-w636-fgv2, UBUNTU-CVE-2025-15570.