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CVE-2015-3636

15
FAUCET Score

CVE-2015-3636 is a use-after-free vulnerability in the Linux kernel (before version 4.0.3) affecting canonical, debian, linux, and redhat distributions. A local attacker can exploit this flaw by leveraging specific socket system calls to cause a denial of service (system crash) or potentially gain privileges. With a CVSS score of 4.9 (AV:L/AC:L/Au:N/C:N/I:N/A:C), it is considered a local attack with low complexity, primarily impacting system availability. There is no known active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or inclusion in the KEV catalog, despite significant community discussion and media coverage, though the media coverage appears unrelated to the actual vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
<= 4.0.2CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
7.0CPE matchmatch criteria
cpe:2.3:o:debian:debian_linux:7.0:*:*:*:*:*:*:*
6.0CPE matchmatch criteria
cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*
12.04CPE matchmatch criteria
cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:lts:*:*:*

CVSS Data

CVSS version used by this source: 2.0

4.9MEDIUM

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

Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
COMPLETE
Access Vector
LOCAL
Access Complexity
LOW
Authentication
NONE
Exploitability Score
3.9
Impact Score
6.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
2.47%
Probability of exploitation in next 30 days
EPSS Percentile
82.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0247 is in the 97th percentile among its peer group of 3,052 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

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 (6)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: kernel-0:2.6.32-504.30.3.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6.4 Advanced Update SupportFixed in: kernel-0:2.6.32-358.65.1.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6.5 Extended Update SupportFixed in: kernel-0:2.6.32-431.61.2.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: kernel-rt-0:3.10.0-229.11.1.rt56.141.11.el7_1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: kernel-0:3.10.0-229.11.1.ael7b
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise MRG 2Fixed in: kernel-rt-1:3.10.0-229.rt56.158.el6rt
View patch

Vendor Advisories (1)

redhatCVE-2015-3636Moderate

kernel: ping sockets: use-after-free leading to local privilege escalation

May 2, 2015

References

git.kernel.org / cgit/linux/kernel/git/torvalds/linux.git/commit
lists.fedoraproject.org / pipermail/package-announce/2015-May/157788.html
lists.fedoraproject.org / pipermail/package-announce/2015-May/157897.html
lists.fedoraproject.org / pipermail/package-announce/2015-May/158804.html
lists.opensuse.org / opensuse-security-announce/2015-07/msg00023.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/msg00011.html
rhn.redhat.com / errata/RHSA-2015-1221.html
rhn.redhat.com / errata/RHSA-2015-1534.html
rhn.redhat.com / errata/RHSA-2015-1564.html
rhn.redhat.com / errata/RHSA-2015-1583.html
rhn.redhat.com / errata/RHSA-2015-1643.html
bugzilla.redhat.com / show_bug.cgi
github.com / torvalds/linux/commit/a134f083e79fb4c3d0a925691e732c56911b4326
debian.org / security/2015/dsa-3290
kernel.org / pub/linux/kernel/v4.x/ChangeLog-4.0.3
openwall.com / lists/oss-security/2015/05/02/5
oracle.com / technetwork/topics/security/linuxbulletinjan2016-2867209.html
securityfocus.com / bid/74450
securitytracker.com / id/1033186
ubuntu.com / usn/USN-2631-1
ubuntu.com / usn/USN-2632-1
ubuntu.com / usn/USN-2633-1
ubuntu.com / usn/USN-2634-1