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CVE-2013-7421

15
FAUCET Score

CVE-2013-7421 describes a vulnerability in the Linux kernel's Crypto API, affecting versions before 3.18.5, including distributions like Canonical, Debian, and Oracle. A local attacker can exploit this flaw by using a bind system call on an AF_ALG socket with a crafted module name to load arbitrary kernel modules. The vulnerability has a low severity CVSS score of 2.1 (AV:L/AC:L/Au:N/C:N/I:P/A:N), indicating local access, low attack complexity, and a potential impact of modifying data. There is no evidence of active exploitation, publicly available exploit code in Metasploit or ExploitDB, nor significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
12.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:lts:*:*:*
14.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:14.04:*:*:*:lts:*:*:*
14.10CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:14.10:*:*:*:*:*:*:*
7.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*
8.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

2.1LOW

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

Confidentiality Impact
NONE
Integrity Impact
PARTIAL
Availability Impact
NONE
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Exploitability Score
3.9
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
0.72%
Probability of exploitation in next 30 days
EPSS Percentile
50.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0072 is in the 84th percentile among its peer group of 2,096 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.6 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 (4)

github_advisorypatch availablevia nvd_reference
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: kernel-rt-0:3.10.0-327.rt56.204.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: kernel-0:3.10.0-327.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise MRG 2Fixed in: kernel-rt-1:3.10.0-327.rt56.170.el6rt
View patch

Vendor Advisories (1)

redhatCVE-2013-7421Low

kernel: crypto api unprivileged arbitrary module load via request_module()

Mar 4, 2013

References

git.kernel.org
rhn.redhat.com / errata/RHSA-2016-0068.html
Third Party Advisory
bugzilla.redhat.com / show_bug.cgi
Issue TrackingThird Party Advisory
github.com / torvalds/linux/commit/5d26a105b5a73e5635eae0629b42fa0a90e07b7b
PatchThird Party Advisory
lkml.org / lkml/2013/3/4/70
ExploitThird Party Advisory
plus.google.com / +MathiasKrause/posts/PqFCo4bfrWu
Third Party Advisory
debian.org / security/2015/dsa-3170
Third Party Advisory
kernel.org / pub/linux/kernel/v3.x/ChangeLog-3.18.5
Release NotesThird Party Advisory
mandriva.com / security/advisories
Third Party Advisory
mandriva.com / security/advisories
Third Party Advisory
openwall.com / lists/oss-security/2015/01/24/4
Mailing ListThird Party Advisory
oracle.com / technetwork/topics/security/linuxbulletinjan2016-2867209.html
Third Party Advisory
oracle.com / technetwork/topics/security/linuxbulletinoct2015-2719645.html
Third Party Advisory
securityfocus.com / bid/72322
Third Party AdvisoryVDB Entry
ubuntu.com / usn/USN-2513-1
Third Party Advisory
ubuntu.com / usn/USN-2514-1
Third Party Advisory
ubuntu.com / usn/USN-2543-1
Third Party Advisory
ubuntu.com / usn/USN-2544-1
Third Party Advisory
ubuntu.com / usn/USN-2545-1
Third Party Advisory
ubuntu.com / usn/USN-2546-1
Third Party Advisory