Description
libuser 0.56 and 0.57 has a TOCTOU (time-of-check time-of-use) race condition when copying and removing directory trees.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| libuser | libuser | 0.57, 0.56 | — |
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 | libuser | 1:0.60~dfsg-1 | — |
| Debian 13 | libuser | 1:0.60~dfsg-1 | — |
| Debian 12 | libuser | 1:0.60~dfsg-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | libuser | No fix yet | — |
| Ubuntu 26.04 LTS | libuser | No fix yet | — |
| Ubuntu 25.10 | libuser | No fix yet | — |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 14.04 LTS | libuser | No fix yet | — |