Description
SWUpdate before 2026.05 is affected by a time-of-check time-of-use (TOCTOU) race condition that allows local unprivileged attackers to escalate privileges to root or install untrusted contents using a signed update.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| sbabic | SWUpdate | < 2026.05 | 2026.05 |
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 | swupdate | 2026.05+dfsg-1 | — |
| Debian 13 | swupdate | No fix yet | — |
| Debian 12 | swupdate | 2022.12+dfsg-4+deb12u3 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | swupdate | No fix yet | — |
| Ubuntu 26.04 LTS | swupdate | No fix yet | — |
| Ubuntu 25.10 | swupdate | No fix yet | — |
| Ubuntu 24.04 LTS | swupdate | No fix yet | — |
| Ubuntu 22.04 LTS | swupdate | No fix yet | — |