Description
In fuse before versions 2.9.8 and 3.x before 3.2.5, fusermount is vulnerable to a restriction bypass when SELinux is active. This allows non-root users to mount a FUSE file system with the 'allow_other' mount option regardless of whether 'user_allow_other' is set in the fuse configuration. An attacker may use this flaw to mount a FUSE file system, accessible by other users, and trick them into accessing files on that file system, possibly causing Denial of Service or other unspecified effects.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| [UNKNOWN] | fuse | fuse 2.9.8, fuse 3.2.5 | — |
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 | fuse3 | 3.2.6-1 | — |
| Debian 13 | fuse | 2.9.8-1 | — |
| Debian 13 | fuse3 | 3.2.6-1 | — |
| Debian 12 | fuse | 2.9.8-1 | — |
| Debian 12 | fuse3 | 3.2.6-1 | — |
| Debian 9 | fuse | 2.9.7-1+deb9u1 | DSA-4257-1 |
| Debian 8 | fuse | 2.9.3-15+deb8u3 | DLA-1468-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 18.04 LTS | fuse | No fix yet | — |
| Ubuntu 14.04 LTS | fuse | No fix yet | — |
Show 1 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu Pro 16.04 LTS | fuse | 2.9.4-1ubuntu3.1+esm1 | USN-5326-1 |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 7 | fuse +2 | 2.9.2-11.el7 | RHSA-2018:3324 |
SUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES 15 | fuse | 2.9.7-3.3.1 | SUSE-SU-2018:3260-1 |
| SLES 12 SP3 | fuse | 2.9.3-6.3.1 | SUSE-SU-2018:3219-1 |
| SLES 11 SP4 | fuse | 2.8.7-0.11.3.1 | SUSE-SU-2019:13948-1 |
Show 2 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| SLES for SAP 12 SP3 | fuse | 2.9.3-6.3.1 | SUSE-SU-2018:3219-1 |
| SLES for SAP 11 SP4 | fuse | 2.8.7-0.11.3.1 | SUSE-SU-2019:13948-1 |
Alpine
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.24 | fuse | 2.9.8-r0 | — |
| Alpine v3.24 | fuse3 | 3.2.5-r0 | — |
| Alpine v3.23 | fuse | 2.9.8-r0 | — |
| Alpine v3.23 | fuse3 | 3.2.5-r0 | — |
| Alpine v3.22 | fuse | 2.9.8-r0 | — |
| Alpine v3.22 | fuse3 | 3.2.5-r0 | — |
| Alpine v3.21 | fuse | 2.9.8-r0 | — |
| Alpine v3.21 | fuse3 | 3.2.5-r0 | — |
| Alpine v3.20 | fuse | 2.9.8-r0 | — |
| Alpine v3.20 | fuse3 | 3.2.5-r0 | — |
Show 15 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine v3.19 | fuse | 2.9.8-r0 | — |
| Alpine v3.19 | fuse3 | 3.2.5-r0 | — |
| Alpine v3.18 | fuse | 2.9.8-r0 | — |
| Alpine v3.18 | fuse3 | 3.2.5-r0 | — |
| Alpine v3.17 | fuse | 2.9.8-r0 | — |
| Alpine v3.17 | fuse3 | 3.2.5-r0 | — |
| Alpine v3.16 | fuse | 2.9.8-r0 | — |
| Alpine v3.16 | fuse3 | 3.2.5-r0 | — |
| Alpine v3.15 | fuse | 2.9.8-r0 | — |
| Alpine v3.15 | fuse3 | 3.2.5-r0 | — |
| Alpine v3.14 | fuse | 2.9.8-r0 | — |
| Alpine v3.14 | fuse3 | 3.2.5-r0 | — |
| Alpine v3.13 | fuse | 2.9.8-r0 | — |
| Alpine v3.13 | fuse3 | 3.2.5-r0 | — |
| Alpine v3.12 | fuse | 2.9.8-r0 | — |
| Alpine v3.12 | fuse3 | 3.2.5-r0 | — |
| Alpine v3.11 | fuse | 2.9.8-r0 | — |
| Alpine v3.11 | fuse3 | 3.2.5-r0 | — |
| Alpine v3.10 | fuse | 2.9.8-r0 | — |
| Alpine v3.10 | fuse3 | 3.2.5-r0 | — |
| Alpine v3.9 | fuse | 2.9.8-r0 | — |
| Alpine v3.9 | fuse3 | 3.2.5-r0 | — |
| Alpine v3.8 | fuse | 2.9.8-r0 | — |
| Alpine v3.7 | fuse | 2.9.8-r0 | — |
| Alpine v3.6 | fuse | 2.9.8-r0 | — |
| Alpine v3.5 | fuse | 2.9.8-r0 | — |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2 | fuse +2 | 2.9.2-11.amzn2 | ALAS2-2018-1123 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | fuse | 2.9.7-10 | — |
| Azure Linux 2 (CBL-Mariner) | fuse | 2.9.7-10 | — |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 7 | fuse +2 | 2.9.4-1.0.7.el7 | ELSA-2020-5773 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
Exploit-DB 1
- fusermount - user_allow_other Restriction Bypass and SELinux Label Control EDB-45106 · dos · Jul 30, 2018 · verified
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 9
- RHSA-2018:3324 Red Hat Security Advisory: fuse security update Red Hat Security Advisories (RHSA) · Jul 1, 2026
- USN-5326-1 fuse vulnerability Ubuntu Security Notices (USN) · Jun 25, 2026
- DSA-4257-1 fuse - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DLA-1468-1 fuse - security update Debian Security (DSA / DLA) · Mar 9, 2026
- SUSE-SU-2019:13948-1 Security update for fuse SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:3260-1 Security update for fuse SUSE / openSUSE Security Updates · Feb 4, 2026
- SUSE-SU-2018:3219-1 Security update for fuse SUSE / openSUSE Security Updates · Feb 4, 2026
- ELSA-2020-5773 Important: fuse security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Jul 27, 2020
- ALAS2-2018-1123 Moderate: fuse security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · Dec 8, 2018
References
- https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2018-10906
- [debian-lts-announce] 20180815 [SECURITY] [DLA 1468-1] fuse security update mailing-list
- DSA-4257 vendor-advisory
- 45106 exploit
- RHSA-2018:3324 vendor-advisory
- FEDORA-2019-dd00364b71 vendor-advisory
- FEDORA-2019-31722b8f33 vendor-advisory
- FEDORA-2019-fd54b80806 vendor-advisory