Description
A security flaw has been discovered in ckolivas lrzip up to 0.651. This impacts the function __GI_____strtol_l_internal of the file strtol_l.c. Performing manipulation results in null pointer dereference. The attack is only possible with local access. The exploit has been released to the public and may be exploited.
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 | No fix yet | — |
| 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 Tumbleweed | lrzip | 0.660-1.1 | openSUSE-SU-2026:11093-1 |
| openSUSE Leap 16.0 | lrzip | 0.660-bp160.1.1 | openSUSE-SU-2026:21179-1 |
Advisories 2
- openSUSE-SU-2026:21179-1 Security update for lrzip SUSE / openSUSE Security Updates · Jul 2, 2026
- openSUSE-SU-2026:11093-1 lrzip-0.660-1.1 on GA media SUSE / openSUSE Security Updates · Jun 24, 2026
References
- VDB-321232 | ckolivas lrzip strtol_l.c __GI_____strtol_l_internal null pointer dereference vdb-entry technical-description
- VDB-321232 | CTI Indicators (IOB, IOC, IOA) signature permissions-required
- Submit #632368 | LRZIP LRZIP version 0.6.5+ (commit 1242aec) compiled on Feb 7 2025 and the newest master version. Null Pointer Dereference third-party-advisory
- https://github.com/ckolivas/lrzip/issues/264 issue-tracking
- https://drive.google.com/file/d/1EFbiiM1d7Ozb0ucZt6zRO3ngU8ugUnCn/view?usp=sharing exploit