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CVE-2013-0311

17
FAUCET Score

CVE-2013-0311 describes a privilege escalation vulnerability in the Linux kernel's vhost.c driver (before version 3.7), specifically impacting KVM guest OS users on affected Linux and Red Hat Enterprise Linux systems. This flaw, rated with a CVSS score of 6.5, allows a guest OS user with existing privileges to gain host OS privileges due to improper handling of cross-region descriptors. While the vulnerability is not listed in CISA's KEV catalog and has no known public exploit code (Metasploit, Nuclei, ExploitDB), it has garnered minimal community discussion.

Impacted Technologies

VendorProductVersion(s)CPE
<= 3.6.11CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
3.0CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:3.0:rc1:*:*:*:*:*:*
3.0CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:3.0:rc2:*:*:*:*:*:*
3.0CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:3.0:rc3:*:*:*:*:*:*
3.0CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:3.0:rc4:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

6.5MEDIUM

AV:A/AC:H/Au:S/C:C/I:C/A:C

Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
Access Vector
ADJACENT_NETWORK
Access Complexity
HIGH
Authentication
SINGLE
Exploitability Score
2.5
Impact Score
10.0
CvssVersion
2.0

Exploit Intelligence

EPSS Score
0.64%
Probability of exploitation in next 30 days
EPSS Percentile
47.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0064 is in the 70th percentile among its peer group of 74 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (4)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: kernel-0:2.6.32-358.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6.2 EUS - Server and Compute Node OnlyFixed in: kernel-0:2.6.32-220.38.1.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6.3 EUS - Server and Compute Node OnlyFixed in: kernel-0:2.6.32-279.31.1.el6
View patch
redhatpatch availablevia redhat_api
Product: RHEV 3.X Hypervisor and Agents for RHEL-6Fixed in: rhev-hypervisor6-0:6.4-20130221.0.el6
View patch

Vendor Advisories (1)

redhatCVE-2013-0311Important

kernel: vhost: fix length for cross region descriptor

Feb 19, 2013

References

git.kernel.org
lists.opensuse.org / opensuse-security-announce/2013-07/msg00018.html
rhn.redhat.com / errata/RHSA-2013-0496.html
rhn.redhat.com / errata/RHSA-2013-0579.html
rhn.redhat.com / errata/RHSA-2013-0882.html
rhn.redhat.com / errata/RHSA-2013-0928.html
bugzilla.redhat.com / show_bug.cgi
github.com / torvalds/linux/commit/bd97120fc3d1a11f3124c7c9ba1d91f51829eb85
kernel.org / pub/linux/kernel/v3.x/patch-3.7.bz2
Patch
mandriva.com / security/advisories
openwall.com / lists/oss-security/2013/02/20/6