Description
fusermount in FUSE before 2.4.1, if installed setuid root, allows local users to corrupt /etc/mtab and possibly modify mount options by performing a mount over a directory whose name contains certain special characters.
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 13 | fuse | 2.4.1-0.1 | — |
| Debian 12 | fuse | 2.4.1-0.1 | — |
| Debian 4.0 | fuse | 2.3.0-4.2etch1 | DTSA-27-1 |
Advisories 1
- DTSA-27-1 fuse - potential data corruption when installed seduid root Debian Security (DSA / DLA) · Mar 9, 2026
References
- GLSA-200511-17 vendor-advisory
- 15529 vdb-entry
- MDKSA-2005:216 vendor-advisory
- 17691 third-party-advisory
- 17695 third-party-advisory
- ADV-2005-2529 vdb-entry