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
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| ckolivas | lrzip | 0.651 | — |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | lrzip | 0.660-1 | — |
| Debian 13 | lrzip | No fix yet | — |
| Debian 12 | lrzip | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | lrzip | No fix yet | — |
| Ubuntu 26.04 LTS | lrzip | No fix yet | — |
| Ubuntu 25.10 | lrzip | No fix yet | — |
| Ubuntu 24.04 LTS | lrzip | No fix yet | — |
| Ubuntu 22.04 LTS | lrzip | No fix yet | — |
Show 4 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | lrzip | No fix yet | — |
| Ubuntu Pro 18.04 LTS | lrzip | No fix yet | — |
| Ubuntu Pro 16.04 LTS | lrzip | No fix yet | — |
| Ubuntu Pro 14.04 LTS | lrzip | No fix yet | — |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 16.0 | lrzip | 0.660-bp160.1.1 | openSUSE-SU-2026:21179-1 |
Advisories 1
- openSUSE-SU-2026:21179-1 Security update for lrzip SUSE / openSUSE Security Updates · Jul 2, 2026
References
- VDB-344931 | ckolivas lrzip stream.c ucompthread null pointer dereference vdb-entry technical-description
- VDB-344931 | CTI Indicators (IOB, IOC, IOA) signature permissions-required
- Submit #752603 | ckolivas lrzip 0.651 NULL Pointer Dereference third-party-advisory
- https://github.com/ckolivas/lrzip/issues/263 issue-tracking
- https://github.com/user-attachments/files/21726331/PoC_NPD.zip exploit
- https://github.com/ckolivas/lrzip/ product