CVE-2011-0543

Certain legacy functionality in fusermount in fuse 2.8.5 and earlier, when util-linux does not support the --no-canonicalize option, allows local users to bypass intended access restrictions and unmount arbitrary directories via a symlink attack.

Published: 2011-09-02 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2011-0543 is rated Low Risk (22/100): CVSS Low severity, with low exploitation likelihood (EPSS 0.33%). Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2011-0543

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.06% 0.33% +0.27%
2 2025-03-17 0.04% 0.06% +0.02%
3 2023-03-07 — 0.04% —

Full EPSS history (6 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2011-0543

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
3.3 2.0 LOW
AV:L/AC:M/Au:N/C:N/I:P/A:P Click to expand
Access vector (AV:L)
Requires local access to the target system.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 3.4 4.9 [email protected]

Weakness enumeration for CVE-2011-0543

OS Trackers for CVE-2011-0543

vendor priority summary link
debian low CVE-2011-0543 low priority: Debian including 1 source packages (fuse), 4 status rows across 4 suites (bookworm, bullseye, sid, trixie): resolved 4. https://security-tracker.debian.org/tracker/CVE-2011-0543
redhat low — https://access.redhat.com/security/cve/CVE-2011-0543
ubuntu medium CVE-2011-0543 medium priority: Ubuntu including 1 source packages (fuse), 6 status rows across 6 suites (dapper, hardy, karmic, lucid, maverick, upstream): released 4, ignored 1, needs-triage 1. https://ubuntu.com/security/CVE-2011-0543

Affected software / configurations for CVE-2011-0543

Vendor Product Version Raw CPE
fuse fuse <= 2.8.5 cpe:2.3:a:fuse:fuse:*:*:*:*:*:*:*:*
fuse fuse 1.9 cpe:2.3:a:fuse:fuse:1.9:*:*:*:*:*:*:*
fuse fuse 2.0 cpe:2.3:a:fuse:fuse:2.0:pre0:*:*:*:*:*:*
fuse fuse 2.0 cpe:2.3:a:fuse:fuse:2.0:pre1:*:*:*:*:*:*
fuse fuse 2.1 cpe:2.3:a:fuse:fuse:2.1:*:*:*:*:*:*:*
fuse fuse 2.2 cpe:2.3:a:fuse:fuse:2.2:*:*:*:*:*:*:*
fuse fuse 2.2.1 cpe:2.3:a:fuse:fuse:2.2.1:*:*:*:*:*:*:*
fuse fuse 2.3 cpe:2.3:a:fuse:fuse:2.3:pre:*:*:*:*:*:*
fuse fuse 2.3 cpe:2.3:a:fuse:fuse:2.3:rc1:*:*:*:*:*:*
fuse fuse 2.3.0 cpe:2.3:a:fuse:fuse:2.3.0:*:*:*:*:*:*:*
fuse fuse 2.4.0 cpe:2.3:a:fuse:fuse:2.4.0:*:*:*:*:*:*:*
fuse fuse 2.4.1 cpe:2.3:a:fuse:fuse:2.4.1:*:*:*:*:*:*:*
fuse fuse 2.4.2 cpe:2.3:a:fuse:fuse:2.4.2:*:*:*:*:*:*:*
fuse fuse 2.5.0 cpe:2.3:a:fuse:fuse:2.5.0:*:*:*:*:*:*:*
fuse fuse 2.5.1 cpe:2.3:a:fuse:fuse:2.5.1:*:*:*:*:*:*:*
fuse fuse 2.5.2 cpe:2.3:a:fuse:fuse:2.5.2:*:*:*:*:*:*:*
fuse fuse 2.5.3 cpe:2.3:a:fuse:fuse:2.5.3:*:*:*:*:*:*:*
fuse fuse 2.6.0 cpe:2.3:a:fuse:fuse:2.6.0:*:*:*:*:*:*:*
fuse fuse 2.6.1 cpe:2.3:a:fuse:fuse:2.6.1:*:*:*:*:*:*:*
fuse fuse 2.6.3 cpe:2.3:a:fuse:fuse:2.6.3:*:*:*:*:*:*:*
fuse fuse 2.6.5 cpe:2.3:a:fuse:fuse:2.6.5:*:*:*:*:*:*:*
fuse fuse 2.7.0 cpe:2.3:a:fuse:fuse:2.7.0:*:*:*:*:*:*:*
fuse fuse 2.7.1 cpe:2.3:a:fuse:fuse:2.7.1:*:*:*:*:*:*:*
fuse fuse 2.7.2 cpe:2.3:a:fuse:fuse:2.7.2:*:*:*:*:*:*:*
fuse fuse 2.7.3 cpe:2.3:a:fuse:fuse:2.7.3:*:*:*:*:*:*:*
fuse fuse 2.7.4 cpe:2.3:a:fuse:fuse:2.7.4:*:*:*:*:*:*:*
fuse fuse 2.7.5 cpe:2.3:a:fuse:fuse:2.7.5:*:*:*:*:*:*:*
fuse fuse 2.7.6 cpe:2.3:a:fuse:fuse:2.7.6:*:*:*:*:*:*:*
fuse fuse 2.8.0 cpe:2.3:a:fuse:fuse:2.8.0:*:*:*:*:*:*:*
fuse fuse 2.8.1 cpe:2.3:a:fuse:fuse:2.8.1:*:*:*:*:*:*:*
fuse fuse 2.8.2 cpe:2.3:a:fuse:fuse:2.8.2:*:*:*:*:*:*:*
fuse fuse 2.8.3 cpe:2.3:a:fuse:fuse:2.8.3:*:*:*:*:*:*:*
fuse fuse 2.8.4 cpe:2.3:a:fuse:fuse:2.8.4:*:*:*:*:*:*:*

References for CVE-2011-0543

cvelogic Threat Intelligence