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CVE-2013-4591

17
FAUCET Score

CVE-2013-4591 is a buffer overflow vulnerability in the Linux kernel, specifically affecting versions before 3.7.2, within the NFSv4 client implementation. A local attacker can trigger this flaw by making a getxattr system call on a specially crafted NFSv4 extended attribute, leading to memory corruption, system crash (denial of service), and potentially other unspecified impacts. With a CVSS score of 6.2, it is considered a medium-severity vulnerability requiring local access and high attack complexity. There is no evidence of active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
<= 3.7.1CPE 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

6.2MEDIUM

AV:L/AC:H/Au:N/C:C/I:C/A:C

Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
Access Vector
LOCAL
Access Complexity
HIGH
Authentication
NONE
Exploitability Score
1.9
Impact Score
10.0
CvssVersion
2.0

Exploit Intelligence

EPSS Score
0.57%
Probability of exploitation in next 30 days
EPSS Percentile
43.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0057 is in the 80th percentile among its peer group of 1,595 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 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (3)

github_advisorypatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: kernel-0:2.6.32-431.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6.4 Extended Update SupportFixed in: kernel-0:2.6.32-358.37.1.el6
View patch

Vendor Advisories (1)

redhatCVE-2013-4591Moderate

kernel: nfs: missing check for buffer length in __nfs4_get_acl_uncached

Dec 11, 2012

References

git.kernel.org
rhn.redhat.com / errata/RHSA-2013-1645.html
rhn.redhat.com / errata/RHSA-2014-0284.html
bugzilla.redhat.com / show_bug.cgi
github.com / torvalds/linux/commit/7d3e91a89b7adbc2831334def9e494dd9892f9af
ExploitPatch
kernel.org / pub/linux/kernel/v3.x/ChangeLog-3.7.2
openwall.com / lists/oss-security/2013/11/18/2
securityfocus.com / bid/63791