CVE-2025-15571: ckolivas lrzip stream.c ucompthread null pointer dereference

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2026-02-10 · updated 2026-06-17
Weakness: CWE-404

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.

Affected products

ckolivas lrzip: through 0.651

References

https://github.com/ckolivas/lrzip/
https://github.com/ckolivas/lrzip/issues/263
https://github.com/user-attachments/files/21726331/PoC_NPD.zip
https://vuldb.com/?ctiid.344931
https://vuldb.com/?id.344931
https://vuldb.com/?submit.752603

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