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CVE-2015-5366

17
FAUCET Score

CVE-2015-5366 is a denial-of-service vulnerability affecting the Linux kernel before version 4.0.6, specifically within the udp_recvmsg and udpv6_recvmsg functions. It allows remote attackers to disrupt EPOLLET epoll applications by sending UDP packets with incorrect checksums. The vulnerability has a CVSS score of 5.0, indicating a medium severity with low attack complexity and no authentication required, leading to a partial availability impact. There is no evidence of active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 4.0.5CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
6.5CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux_server_aus:6.5:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.0MEDIUM

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

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
PARTIAL
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
2.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
6.25%
Probability of exploitation in next 30 days
EPSS Percentile
92.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0624 is in the 90th percentile among its peer group of 23,690 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, 0.1 Bluesky, 0.0 Mastodon, and 0.4 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 (8)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 5Fixed in: kernel-0:2.6.18-408.el5
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: kernel-0:2.6.32-573.3.1.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6.4 Advanced Update SupportFixed in: kernel-0:2.6.32-358.71.1.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6.5 Advanced Update SupportFixed in: kernel-0:2.6.32-431.72.1.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6.6 Extended Update SupportFixed in: kernel-0:2.6.32-504.49.1.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: kernel-rt-0:3.10.0-229.14.1.rt56.141.13.el7_1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: kernel-0:3.10.0-229.14.1.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise MRG 2Fixed in: kernel-rt-1:3.10.0-229.rt56.161.el6rt
View patch

Vendor Advisories (1)

redhatCVE-2015-5366Important

kernel: net: incorrect processing of checksums in UDP implementation

Jul 1, 2015

References

git.kernel.org / cgit/linux/kernel/git/torvalds/linux.git/commit
kb.juniper.net / InfoCenter/index
lists.opensuse.org / opensuse-security-announce/2015-07/msg00023.html
lists.opensuse.org / opensuse-security-announce/2015-07/msg00049.html
lists.opensuse.org / opensuse-security-announce/2015-08/msg00011.html
lists.opensuse.org / opensuse-security-announce/2015-09/msg00004.html
lists.opensuse.org / opensuse-security-announce/2015-09/msg00007.html
lists.opensuse.org / opensuse-security-announce/2015-09/msg00008.html
lists.opensuse.org / opensuse-security-announce/2015-09/msg00009.html
lists.opensuse.org / opensuse-security-announce/2015-09/msg00010.html
lists.opensuse.org / opensuse-security-announce/2015-09/msg00011.html
lists.opensuse.org / opensuse-security-announce/2015-09/msg00018.html
lists.opensuse.org / opensuse-security-announce/2015-09/msg00021.html
rhn.redhat.com / errata/RHSA-2015-1623.html
rhn.redhat.com / errata/RHSA-2015-1778.html
rhn.redhat.com / errata/RHSA-2015-1787.html
rhn.redhat.com / errata/RHSA-2016-0045.html
rhn.redhat.com / errata/RHSA-2016-1096.html
rhn.redhat.com / errata/RHSA-2016-1100.html
access.redhat.com / errata/RHSA-2016:1225
bugzilla.redhat.com / show_bug.cgi
github.com / torvalds/linux/commit/beb39db59d14990e401e235faf66a6b9b31240b0
debian.org / security/2015/dsa-3313
debian.org / security/2015/dsa-3329
kernel.org / pub/linux/kernel/v4.x/ChangeLog-4.0.6
openwall.com / lists/oss-security/2015/06/30/13
oracle.com / technetwork/topics/security/linuxbulletinjan2016-2867209.html
oracle.com / technetwork/topics/security/linuxbulletinoct2015-2719645.html
securityfocus.com / bid/75510
securitytracker.com / id/1032794
ubuntu.com / usn/USN-2680-1
ubuntu.com / usn/USN-2681-1
ubuntu.com / usn/USN-2682-1
ubuntu.com / usn/USN-2683-1
ubuntu.com / usn/USN-2684-1
ubuntu.com / usn/USN-2713-1
ubuntu.com / usn/USN-2714-1