Description
zchunk before 1.3.2 has multiple integer overflows via malformed zchunk files to lib/comp/comp.c, lib/comp/zstd/zstd.c, lib/dl/multipart.c, or lib/header.c.
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 | zchunk | 1.3.2+ds1-1 | — |
| Debian 13 | zchunk | 1.3.2+ds1-1 | — |
| Debian 12 | zchunk | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | zchunk | No fix yet | — |
| Ubuntu 22.04 LTS | zchunk | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 SP5 | zchunk | 1.1.16-150400.3.7.1 | SUSE-SU-2023:4225-1 |
| SLES 15 SP4 | zchunk | 1.1.16-150400.3.7.1 | SUSE-SU-2023:4225-1 |
| SLES 15 SP3 | zchunk | 1.1.5-150200.3.5.1 | SUSE-SU-2023:4224-1 |
| SLES 15 SP2 | zchunk | 1.1.5-150200.3.5.1 | SUSE-SU-2023:4224-1 |
Show 11 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 15 SP3 | zchunk | 1.1.5-150200.3.5.1 | SUSE-SU-2023:4224-1 |
| SLES for SAP 15 SP2 | zchunk | 1.1.5-150200.3.5.1 | SUSE-SU-2023:4224-1 |
| SLE Micro 5.5 | zchunk | 1.1.16-150400.3.7.1 | SUSE-SU-2024:2432-1, SUSE-SU-2023:4225-1 |
| SLE Micro 5.4 | zchunk | 1.1.16-150400.3.7.1 | SUSE-SU-2023:4225-1 |
| SLE Micro 5.3 | zchunk | 1.1.16-150400.3.7.1 | SUSE-SU-2023:4225-1 |
| SLE HPC 15 SP3 | zchunk | 1.1.5-150200.3.5.1 | SUSE-SU-2023:4224-1 |
| SLE HPC 15 SP2 | zchunk | 1.1.5-150200.3.5.1 | SUSE-SU-2023:4224-1 |
| SUSE Manager Server 4.2 | zchunk | 1.1.5-150200.3.5.1 | SUSE-SU-2023:4224-1 |
| SUSE Manager Proxy 4.2 | zchunk | 1.1.5-150200.3.5.1 | SUSE-SU-2023:4224-1 |
| SUSE Linux Enterprise Installer Updates 15 SP4 | zchunk | 1.1.16-150400.3.7.1 | SUSE-SU-2023:4225-1 |
| SUSE Enterprise Storage 7.1 | zchunk | 1.1.5-150200.3.5.1 | SUSE-SU-2023:4224-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap 15.5 | zchunk | 1.1.16-150400.3.7.1 | SUSE-SU-2023:4225-1 |
| openSUSE Leap 15.4 | zchunk | 1.1.16-150400.3.7.1 | SUSE-SU-2023:4225-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Leap Micro 5.4 | zchunk | 1.1.16-150400.3.7.1 | SUSE-SU-2023:4225-1 |
| openSUSE Leap Micro 5.3 | zchunk | 1.1.16-150400.3.7.1 | SUSE-SU-2023:4225-1 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 2 (CBL-Mariner) | zchunk | 1.1.16-3 | — |
Advisories 3
- SUSE-SU-2023:4225-1 Security update for zchunk SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2024:2432-1 Security update for zchunk SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2023:4224-1 Security update for zchunk SUSE / openSUSE Security Updates · Feb 4, 2026