Description
A vulnerability was found in ckolivas lrzip up to 0.651. This impacts the function lzma_decompress_buf of the file stream.c. Performing a manipulation results in use after free. Attacking locally is a requirement. The exploit has been made public and could 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 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-344926 | ckolivas lrzip stream.c lzma_decompress_buf use after free vdb-entry technical-description
- VDB-344926 | CTI Indicators (IOB, IOC, IOA) signature permissions-required
- Submit #752595 | ckolivas lrzip 0.651 Memory Corruption third-party-advisory
- https://github.com/ckolivas/lrzip/issues/262 issue-tracking
- https://github.com/user-attachments/files/21709004/PoC_UAF.zip exploit
- https://github.com/ckolivas/lrzip/ product