Description
csync2 uses insecure temporary directories when compiled with C99 or later, allowing for TOCTOU style attacks on the temporary directories.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| SUSE | openSUSE Tumbleweed | ? – < 2.0+git.1600444747.83b3644-3.1 | 2.0+git.1600444747.83b3644-3.1 |
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 | csync2 | 2.0-42-g83b3644-6 | — |
| Debian 13 | csync2 | No fix yet | — |
| Debian 12 | csync2 | No fix yet | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | csync2 | No fix yet | — |
| Ubuntu 26.04 LTS | csync2 | No fix yet | — |
| Ubuntu 25.10 | csync2 | No fix yet | — |
| Ubuntu 24.04 LTS | csync2 | No fix yet | — |
| Ubuntu 22.04 LTS | csync2 | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | csync2 | No fix yet | — |
| Ubuntu 18.04 LTS | csync2 | No fix yet | — |
| Ubuntu 16.04 LTS | csync2 | No fix yet | — |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 16.0 | csync2 | 2.0+git.1600444747.83b3644-160000.3.1 | SUSE-SU-2026:22041-1 |
| SLES 16.0 | csync2 | 2.0+git.1600444747.83b3644-160000.3.1 | SUSE-SU-2026:21994-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | csync2 | 2.0+git.1600444747.83b3644-3.1 | openSUSE-SU-2026:10600-1 |
Advisories 3
- SUSE-SU-2026:22041-1 Security update for csync2 SUSE / openSUSE Security Updates · Jun 9, 2026
- SUSE-SU-2026:21994-1 Security update for csync2 SUSE / openSUSE Security Updates · Jun 9, 2026
- openSUSE-SU-2026:10600-1 csync2-2.0+git.1600444747.83b3644-3.1 on GA media SUSE / openSUSE Security Updates · Apr 23, 2026