Null Pointer Dereference in ckolivas lrzip Up to 0.651
CVE-2025-15571

4.8MEDIUM

Key Information:

Vendor

Ckolivas

Status
Lrzip
Vendor
CVE Published:
10 February 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-15571?

A local security vulnerability has been found in the ckolivas lrzip, specifically in the ucompthread function of stream.c. This flaw allows for a null pointer dereference, which can lead to potential application crashes or unstable behavior. The issue can be exploited only from a local environment, posing risks particularly to users who may not have updated the software. Although the project was notified of this issue through an early report, no response or mitigation has been published yet. Publicly disclosed exploit information indicates a pressing need for users to address this vulnerability.

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Affected Version(s)

lrzip 0.651

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2025-15571 - Proof of Concept

References

https://vuldb.com/?id.344931
vdb-entrytechnical-description
https://vuldb.com/?ctiid.344931
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https://vuldb.com/?submit.752603
third-party-advisory

CVSS V4

Score:
4.8
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
Low
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

ziiiro (VulDB User)
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