Description
In Long Range Zip (aka lrzip) 0.631, there is a use-after-free in the ucompthread function (stream.c). Remote attackers could leverage this vulnerability to cause a denial of service via a crafted lrz file.
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 | 0.631+git180517-1 | — |
| Debian 13 | lrzip | 0.631+git180517-1 | — |
| Debian 12 | lrzip | 0.631+git180517-1 | — |
| Debian 9 | lrzip | 0.631-1+deb9u1 | DLA-2725-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | lrzip | 0.631-1+deb9u1build0.18.04.1 | USN-5171-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 16.04 LTS | lrzip | 0.621-1ubuntu0.1~esm1 | USN-5171-2 |
| Ubuntu Pro 14.04 LTS | lrzip | 0.616-1ubuntu0.1~esm1 | USN-5171-2 |
Advisories 3
- USN-5171-2 lrzip vulnerabilities Ubuntu Security Notices (USN) · Jun 29, 2026
- DLA-2725-1 lrzip - security update Debian Security (DSA / DLA) · Mar 9, 2026
- USN-5171-1 lrzip vulnerabilities Ubuntu Security Notices (USN) · Feb 10, 2026