Description
A null pointer dereference was discovered in ucompthread in stream.c in Irzip 0.631 which allows attackers to cause a denial of service (DOS) via a crafted compressed 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 | 0.640-1 | — |
| Debian 13 | lrzip | 0.640-1 | — |
| Debian 12 | lrzip | 0.640-1 | — |
| Debian 9 | lrzip | 0.631-1+deb9u2 | DLA-2981-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 22.04 LTS | lrzip | 0.651-2ubuntu0.22.04.1 | USN-5840-1 |
| Ubuntu 20.04 LTS | lrzip | 0.631+git180528-1+deb10u1build0.20.04.1 | USN-5840-1 |
| Ubuntu 18.04 LTS | lrzip | 0.631-1+deb9u3build0.18.04.1 | USN-5840-1 |
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~esm2 | USN-5840-1 |
| Ubuntu Pro 14.04 LTS | lrzip | 0.616-1ubuntu0.1~esm2 | USN-5840-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | lrzip | 0.640-r0 | — |
| Alpine v3.23 | lrzip | 0.640-r0 | — |
| Alpine v3.22 | lrzip | 0.640-r0 | — |
| Alpine v3.21 | lrzip | 0.640-r0 | — |
| Alpine v3.20 | lrzip | 0.640-r0 | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | lrzip | 0.640-r0 | — |
| Alpine v3.18 | lrzip | 0.640-r0 | — |
| Alpine v3.17 | lrzip | 0.640-r0 | — |
Advisories 2
- USN-5840-1 lrzip vulnerabilities Ubuntu Security Notices (USN) · Jun 29, 2026
- DLA-2981-1 lrzip - security update Debian Security (DSA / DLA) · Mar 9, 2026