Description
sup 1.8 and earlier does not properly create temporary files, which allows local users to overwrite arbitrary files.
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 | sup | 1.8-9 | — |
| Debian 13 | sup | 1.8-9 | — |
| Debian 12 | sup | 1.8-9 | — |
| Debian 3.0 | sup | 1.8-8woody1 | DSA-353 |
Advisories 1
- DSA-353 sup - insecure temporary file Debian Security (DSA / DLA) · Mar 9, 2026
References
- DSA-353 vendor-advisory