ckolivas lrzip up to 0.651 stream.c ucompthread null pointer dereference
Summary
A vulnerability classified as problematic has been found in ckolivas lrzip up to 0.651. This issue affects the function ucompthread of the file stream.c. Performing a manipulation results in null pointer dereference.
This vulnerability is identified as CVE-2025-15571. The attack is only possible with local access. Additionally, an exploit exists.
The project was informed of the problem early through an issue report but has not responded yet.
Details
A vulnerability was found in ckolivas lrzip up to 0.651. It has been classified as problematic. This affects the function ucompthread of the file stream.c. The manipulation with an unknown input leads to a null pointer dereference vulnerability. CWE is classifying the issue as CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. This is going to have an impact on availability.
It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2025-15571. The exploitability is told to be easy. Attacking locally is a requirement. Technical details and a public exploit are known.
The exploit is shared for download at github.com. It is declared as proof-of-concept. The project was informed of the problem early through an issue report but has not responded yet.
There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.
Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
Product
Vendor
Name
Version
Website
- Product: https://github.com/ckolivas/lrzip/
CPE 2.3
CPE 2.2
CVSSv4
VulDB Vector: 🔒VulDB Reliability: 🔍
CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒
CVSSv3
VulDB Meta Base Score: 4.0VulDB Meta Temp Score: 3.9
VulDB Base Score: 3.3
VulDB Temp Score: 3.0
VulDB Vector: 🔒
VulDB Reliability: 🔍
NVD Base Score: 5.5
NVD Vector: 🔒
CNA Base Score: 3.3
CNA Vector: 🔒
CVSSv2
| AV | AC | Au | C | I | A |
|---|---|---|---|---|---|
| 💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
| 💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
| 💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
| Vector | Complexity | Authentication | Confidentiality | Integrity | Availability |
|---|---|---|---|---|---|
| Unlock | Unlock | Unlock | Unlock | Unlock | Unlock |
| Unlock | Unlock | Unlock | Unlock | Unlock | Unlock |
| Unlock | Unlock | Unlock | Unlock | Unlock | Unlock |
VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍
Exploiting
Class: Null pointer dereferenceCWE: CWE-476 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒
Physical: Partially
Local: Yes
Remote: No
Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒
EPSS Score: 🔒
EPSS Percentile: 🔒
Price Prediction: 🔍
Current Price Estimation: 🔒
| 0-Day | Unlock | Unlock | Unlock | Unlock |
|---|---|---|---|---|
| Today | Unlock | Unlock | Unlock | Unlock |
Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: no mitigation knownStatus: 🔍
0-Day Time: 🔒
Timeline
02/08/2026 Advisory disclosed02/08/2026 VulDB entry created
02/27/2026 VulDB entry last update
Sources
Product: github.comAdvisory: 263
Status: Not defined
CVE: CVE-2025-15571 (🔒)
GCVE (CVE): GCVE-0-2025-15571
GCVE (VulDB): GCVE-100-344931
scip Labs: https://www.scip.ch/en/?labs.20161013
Entry
Created: 02/08/2026 09:24Updated: 02/27/2026 18:24
Changes: 02/08/2026 09:24 (57), 02/11/2026 12:43 (30), 02/27/2026 18:24 (11)
Complete: 🔍
Submitter: ziiiro
Cache ID: 216::103
Submit
Accepted
- Submit #752603: ckolivas lrzip 0.651 NULL Pointer Dereference (by ziiiro)
Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.
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