CVE-2011-1011

The seunshare_mount function in sandbox/seunshare.c in seunshare in certain Red Hat packages of policycoreutils 2.0.83 and earlier in Red Hat Enterprise Linux (RHEL) 6 and earlier, and Fedora 14 and earlier, mounts a new directory on top of /tmp without assigning root ownership and the sticky bit to this new directory, which allows local users to replace or delete arbitrary /tmp files, and consequently cause a denial of service or possibly gain privileges, by running a setuid application that relies on /tmp, as demonstrated by the ksu application.

Published: 2011-02-24 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2011-1011 is rated Low Risk (37.9/100): CVSS Medium severity, with low exploitation likelihood (EPSS 0.37%). 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-2011-1011

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 0.04% 0.37% +0.32%
2 2023-03-07 1.55% 0.04% -1.50%
3 2022-02-04 — 1.55% —

Full EPSS history (3 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2011-1011

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
6.9 2.0 MEDIUM
AV:L/AC:M/Au:N/C:C/I:C/A:C 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:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 3.4 10.0 [email protected]

Weakness enumeration for CVE-2011-1011

OS Trackers for CVE-2011-1011

vendor priority summary link
redhat high — https://access.redhat.com/security/cve/CVE-2011-1011
ubuntu low CVE-2011-1011 low priority: Ubuntu including 1 source packages (policycoreutils), 23 status rows across 23 suites (artful, bionic, cosmic, dapper, disco, hardy, karmic, lucid, maverick, natty, oneiric, precise, quantal, raring, saucy, trusty, upstream, utopic, vivid, wily, xenial, yakkety, zesty): ignored 18, not-affected 4, released 1. https://ubuntu.com/security/CVE-2011-1011

Affected software / configurations for CVE-2011-1011

Vendor Product Version Raw CPE
redhat policycoreutils <= 2.0.83 cpe:2.3:a:redhat:policycoreutils:*:*:*:*:*:*:*:*
redhat policycoreutils 1.0 cpe:2.3:a:redhat:policycoreutils:1.0:*:*:*:*:*:*:*
redhat policycoreutils 1.1 cpe:2.3:a:redhat:policycoreutils:1.1:*:*:*:*:*:*:*
redhat policycoreutils 1.2 cpe:2.3:a:redhat:policycoreutils:1.2:*:*:*:*:*:*:*
redhat policycoreutils 1.4 cpe:2.3:a:redhat:policycoreutils:1.4:*:*:*:*:*:*:*
redhat policycoreutils 1.6 cpe:2.3:a:redhat:policycoreutils:1.6:*:*:*:*:*:*:*
redhat policycoreutils 1.8 cpe:2.3:a:redhat:policycoreutils:1.8:*:*:*:*:*:*:*
redhat policycoreutils 1.10 cpe:2.3:a:redhat:policycoreutils:1.10:*:*:*:*:*:*:*
redhat policycoreutils 1.12 cpe:2.3:a:redhat:policycoreutils:1.12:*:*:*:*:*:*:*
redhat policycoreutils 1.14 cpe:2.3:a:redhat:policycoreutils:1.14:*:*:*:*:*:*:*
redhat policycoreutils 1.16 cpe:2.3:a:redhat:policycoreutils:1.16:*:*:*:*:*:*:*
redhat policycoreutils 1.18 cpe:2.3:a:redhat:policycoreutils:1.18:*:*:*:*:*:*:*
redhat policycoreutils 1.20 cpe:2.3:a:redhat:policycoreutils:1.20:*:*:*:*:*:*:*
redhat policycoreutils 1.21.1 cpe:2.3:a:redhat:policycoreutils:1.21.1:*:*:*:*:*:*:*
redhat policycoreutils 1.21.2 cpe:2.3:a:redhat:policycoreutils:1.21.2:*:*:*:*:*:*:*
redhat policycoreutils 1.21.3 cpe:2.3:a:redhat:policycoreutils:1.21.3:*:*:*:*:*:*:*
redhat policycoreutils 1.21.4 cpe:2.3:a:redhat:policycoreutils:1.21.4:*:*:*:*:*:*:*
redhat policycoreutils 1.21.5 cpe:2.3:a:redhat:policycoreutils:1.21.5:*:*:*:*:*:*:*
redhat policycoreutils 1.21.6 cpe:2.3:a:redhat:policycoreutils:1.21.6:*:*:*:*:*:*:*
redhat policycoreutils 1.21.7 cpe:2.3:a:redhat:policycoreutils:1.21.7:*:*:*:*:*:*:*
redhat policycoreutils 1.21.8 cpe:2.3:a:redhat:policycoreutils:1.21.8:*:*:*:*:*:*:*
redhat policycoreutils 1.21.9 cpe:2.3:a:redhat:policycoreutils:1.21.9:*:*:*:*:*:*:*
redhat policycoreutils 1.21.10 cpe:2.3:a:redhat:policycoreutils:1.21.10:*:*:*:*:*:*:*
redhat policycoreutils 1.21.11 cpe:2.3:a:redhat:policycoreutils:1.21.11:*:*:*:*:*:*:*
redhat policycoreutils 1.21.12 cpe:2.3:a:redhat:policycoreutils:1.21.12:*:*:*:*:*:*:*
redhat policycoreutils 1.21.13 cpe:2.3:a:redhat:policycoreutils:1.21.13:*:*:*:*:*:*:*
redhat policycoreutils 1.21.14 cpe:2.3:a:redhat:policycoreutils:1.21.14:*:*:*:*:*:*:*
redhat policycoreutils 1.21.15 cpe:2.3:a:redhat:policycoreutils:1.21.15:*:*:*:*:*:*:*
redhat policycoreutils 1.21.16 cpe:2.3:a:redhat:policycoreutils:1.21.16:*:*:*:*:*:*:*
redhat policycoreutils 1.21.17 cpe:2.3:a:redhat:policycoreutils:1.21.17:*:*:*:*:*:*:*
redhat policycoreutils 1.21.18 cpe:2.3:a:redhat:policycoreutils:1.21.18:*:*:*:*:*:*:*
redhat policycoreutils 1.21.19 cpe:2.3:a:redhat:policycoreutils:1.21.19:*:*:*:*:*:*:*
redhat policycoreutils 1.21.20 cpe:2.3:a:redhat:policycoreutils:1.21.20:*:*:*:*:*:*:*
redhat policycoreutils 1.21.21 cpe:2.3:a:redhat:policycoreutils:1.21.21:*:*:*:*:*:*:*
redhat policycoreutils 1.21.22 cpe:2.3:a:redhat:policycoreutils:1.21.22:*:*:*:*:*:*:*
redhat policycoreutils 1.22 cpe:2.3:a:redhat:policycoreutils:1.22:*:*:*:*:*:*:*
redhat policycoreutils 1.23.1 cpe:2.3:a:redhat:policycoreutils:1.23.1:*:*:*:*:*:*:*
redhat policycoreutils 1.23.2 cpe:2.3:a:redhat:policycoreutils:1.23.2:*:*:*:*:*:*:*
redhat policycoreutils 1.23.3 cpe:2.3:a:redhat:policycoreutils:1.23.3:*:*:*:*:*:*:*
redhat policycoreutils 1.23.4 cpe:2.3:a:redhat:policycoreutils:1.23.4:*:*:*:*:*:*:*
redhat policycoreutils 1.23.5 cpe:2.3:a:redhat:policycoreutils:1.23.5:*:*:*:*:*:*:*
redhat policycoreutils 1.23.6 cpe:2.3:a:redhat:policycoreutils:1.23.6:*:*:*:*:*:*:*
redhat policycoreutils 1.23.7 cpe:2.3:a:redhat:policycoreutils:1.23.7:*:*:*:*:*:*:*
redhat policycoreutils 1.23.8 cpe:2.3:a:redhat:policycoreutils:1.23.8:*:*:*:*:*:*:*
redhat policycoreutils 1.23.9 cpe:2.3:a:redhat:policycoreutils:1.23.9:*:*:*:*:*:*:*
redhat policycoreutils 1.23.10 cpe:2.3:a:redhat:policycoreutils:1.23.10:*:*:*:*:*:*:*
redhat policycoreutils 1.23.11 cpe:2.3:a:redhat:policycoreutils:1.23.11:*:*:*:*:*:*:*
redhat policycoreutils 1.24 cpe:2.3:a:redhat:policycoreutils:1.24:*:*:*:*:*:*:*
redhat policycoreutils 1.25.1 cpe:2.3:a:redhat:policycoreutils:1.25.1:*:*:*:*:*:*:*
redhat policycoreutils 1.25.2 cpe:2.3:a:redhat:policycoreutils:1.25.2:*:*:*:*:*:*:*
redhat policycoreutils 1.25.3 cpe:2.3:a:redhat:policycoreutils:1.25.3:*:*:*:*:*:*:*
redhat policycoreutils 1.25.4 cpe:2.3:a:redhat:policycoreutils:1.25.4:*:*:*:*:*:*:*
redhat policycoreutils 1.25.5 cpe:2.3:a:redhat:policycoreutils:1.25.5:*:*:*:*:*:*:*
redhat policycoreutils 1.25.6 cpe:2.3:a:redhat:policycoreutils:1.25.6:*:*:*:*:*:*:*
redhat policycoreutils 1.25.7 cpe:2.3:a:redhat:policycoreutils:1.25.7:*:*:*:*:*:*:*
redhat policycoreutils 1.25.8 cpe:2.3:a:redhat:policycoreutils:1.25.8:*:*:*:*:*:*:*
redhat policycoreutils 1.25.9 cpe:2.3:a:redhat:policycoreutils:1.25.9:*:*:*:*:*:*:*
redhat policycoreutils 1.26 cpe:2.3:a:redhat:policycoreutils:1.26:*:*:*:*:*:*:*
redhat policycoreutils 1.27.1 cpe:2.3:a:redhat:policycoreutils:1.27.1:*:*:*:*:*:*:*
redhat policycoreutils 1.27.2 cpe:2.3:a:redhat:policycoreutils:1.27.2:*:*:*:*:*:*:*
redhat policycoreutils 1.27.3 cpe:2.3:a:redhat:policycoreutils:1.27.3:*:*:*:*:*:*:*
redhat policycoreutils 1.27.4 cpe:2.3:a:redhat:policycoreutils:1.27.4:*:*:*:*:*:*:*
redhat policycoreutils 1.27.5 cpe:2.3:a:redhat:policycoreutils:1.27.5:*:*:*:*:*:*:*
redhat policycoreutils 1.27.6 cpe:2.3:a:redhat:policycoreutils:1.27.6:*:*:*:*:*:*:*
redhat policycoreutils 1.27.7 cpe:2.3:a:redhat:policycoreutils:1.27.7:*:*:*:*:*:*:*
redhat policycoreutils 1.27.8 cpe:2.3:a:redhat:policycoreutils:1.27.8:*:*:*:*:*:*:*
redhat policycoreutils 1.27.9 cpe:2.3:a:redhat:policycoreutils:1.27.9:*:*:*:*:*:*:*
redhat policycoreutils 1.27.10 cpe:2.3:a:redhat:policycoreutils:1.27.10:*:*:*:*:*:*:*
redhat policycoreutils 1.27.11 cpe:2.3:a:redhat:policycoreutils:1.27.11:*:*:*:*:*:*:*
redhat policycoreutils 1.27.12 cpe:2.3:a:redhat:policycoreutils:1.27.12:*:*:*:*:*:*:*
redhat policycoreutils 1.27.13 cpe:2.3:a:redhat:policycoreutils:1.27.13:*:*:*:*:*:*:*
redhat policycoreutils 1.27.14 cpe:2.3:a:redhat:policycoreutils:1.27.14:*:*:*:*:*:*:*
redhat policycoreutils 1.27.15 cpe:2.3:a:redhat:policycoreutils:1.27.15:*:*:*:*:*:*:*
redhat policycoreutils 1.27.16 cpe:2.3:a:redhat:policycoreutils:1.27.16:*:*:*:*:*:*:*
redhat policycoreutils 1.27.17 cpe:2.3:a:redhat:policycoreutils:1.27.17:*:*:*:*:*:*:*
redhat policycoreutils 1.27.18 cpe:2.3:a:redhat:policycoreutils:1.27.18:*:*:*:*:*:*:*
redhat policycoreutils 1.27.19 cpe:2.3:a:redhat:policycoreutils:1.27.19:*:*:*:*:*:*:*
redhat policycoreutils 1.27.20 cpe:2.3:a:redhat:policycoreutils:1.27.20:*:*:*:*:*:*:*
redhat policycoreutils 1.27.21 cpe:2.3:a:redhat:policycoreutils:1.27.21:*:*:*:*:*:*:*
redhat policycoreutils 1.27.22 cpe:2.3:a:redhat:policycoreutils:1.27.22:*:*:*:*:*:*:*

References for CVE-2011-1011

URL Tags
http://archives.neohapsis.com/archives/fulldisclosure/2011-02/0585.html
http://lists.fedoraproject.org/pipermail/package-announce/2011-March/056227.html
http://openwall.com/lists/oss-security/2011/02/23/1
http://openwall.com/lists/oss-security/2011/02/23/2
http://pkgs.fedoraproject.org/gitweb/?p=policycoreutils.git%3Ba=blob%3Bf=policycoreutils-rhat.patch%3Bh=d4db5bc06027de23d12a4b3f18fa6f9b1517df27%3Bhb=HEAD#l2197
http://secunia.com/advisories/43415 Vendor Advisory
http://secunia.com/advisories/43844
http://secunia.com/advisories/44034
http://www.redhat.com/support/errata/RHSA-2011-0414.html
http://www.securityfocus.com/bid/46510
http://www.securitytracker.com/id?1025291
http://www.vupen.com/english/advisories/2011/0701
http://www.vupen.com/english/advisories/2011/0864
https://bugzilla.redhat.com/show_bug.cgi?id=633544 Patch
https://exchange.xforce.ibmcloud.com/vulnerabilities/65641
cvelogic Threat Intelligence