Null Pointer Dereference in ckolivas lrzip Affects Local Operations
CVE-2025-9396

4.8MEDIUM

Key Information:

Vendor

Ckolivas

Status
Lrzip
Vendor
CVE Published:
24 August 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-9396?

A security flaw within the ckolivas lrzip tool has been identified, specifically affecting the __GI_____strtol_l_internal function in strtol_l.c. This vulnerability allows for a null pointer dereference condition, which can be exploited by an attacker with local access to the system. The potential for exploitation has been made publicly available. Users of lrzip, particularly those operating versions up to 0.651, should be aware of the implications and take necessary precautions to mitigate risks associated with this flaw.

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-2025-9396 - Proof of Concept

References

https://vuldb.com/?id.321232
vdb-entrytechnical-description
https://vuldb.com/?ctiid.321232
signaturepermissions-required
https://vuldb.com/?submit.632368
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

xdcao (VulDB User)
.
CVE-2025-9396 : Null Pointer Dereference in ckolivas lrzip Affects Local Operations