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CVE-2013-4345

17
FAUCET Score

CVE-2013-4345 describes an off-by-one error in the Linux kernel's cryptographic pseudo-random number generator (PRNG) function, affecting Linux distributions like Fedora and Red Hat. This vulnerability has a CVSS score of 5.8, indicating a medium severity, and could allow remote, low-complexity attacks to partially compromise confidentiality and integrity by making it easier to defeat cryptographic protections. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 3.11.4CPE 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

5.8MEDIUM

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

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
NONE
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
4.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
3.18%
Probability of exploitation in next 30 days
EPSS Percentile
86.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0318 is in the 81st percentile among its peer group of 19,958 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 0.2 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)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: kernel-0:2.6.18-371.1.2.el5
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 MRG 2Fixed in: kernel-rt-0:3.8.13-rt14.25.el6rt
View patch

Vendor Advisories (1)

redhatCVE-2013-4345Moderate

kernel: ansi_cprng: off by one error in non-block size request

Sep 17, 2013

References

marc.info
Patch
rhn.redhat.com / errata/RHSA-2013-1449.html
rhn.redhat.com / errata/RHSA-2013-1490.html
rhn.redhat.com / errata/RHSA-2013-1645.html
bugzilla.redhat.com / show_bug.cgi
securityfocus.com / bid/62740
ubuntu.com / usn/USN-2064-1
ubuntu.com / usn/USN-2065-1
ubuntu.com / usn/USN-2068-1
ubuntu.com / usn/USN-2070-1
ubuntu.com / usn/USN-2071-1
ubuntu.com / usn/USN-2072-1
ubuntu.com / usn/USN-2074-1
ubuntu.com / usn/USN-2075-1
ubuntu.com / usn/USN-2076-1
ubuntu.com / usn/USN-2109-1
ubuntu.com / usn/USN-2110-1
ubuntu.com / usn/USN-2158-1