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CVE-2015-1421

28
FAUCET Score

CVE-2015-1421 is a critical use-after-free vulnerability in the Linux kernel's SCTP implementation (sctp_assoc_update function in net/sctp/associola.c), affecting versions before 3.18.8, including various Canonical and Debian Linux distributions. This flaw allows remote attackers to trigger a denial of service (slab corruption and system panic) or potentially achieve other unspecified impacts by exploiting an INIT collision that mishandles shared-key data. With a CVSS score of 10.0 (AV:N/AC:L/Au:N/C:C/I:C/A:C), it represents a severe risk due to its network-based attack vector, low attack complexity, and complete compromise potential for confidentiality, integrity, and availability. Despite its high severity, there is no known active exploitation, publicly available exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage surrounding this vulnerability.

Impacted Technologies

VendorProductVersion(s)CPE
>= 2.6.24, < 3.2.67CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 3.3, < 3.4.107CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 3.5, < 3.10.70CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 3.11, < 3.12.38CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
>= 3.13, < 3.14.34CPE matchmatch criteria
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

10.0HIGH

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

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

Exploit Intelligence

EPSS Score
9.83%
Probability of exploitation in next 30 days
EPSS Percentile
95.0%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0983 is in the 92nd percentile among its peer group of 51,551 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, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (7)

redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6Fixed in: kernel-0:2.6.32-504.16.2.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6.2 Advanced Update SupportFixed in: kernel-0:2.6.32-220.63.2.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6.4 Advanced Update SupportFixed in: kernel-0:2.6.32-358.61.1.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 6.5 Extended Update SupportFixed in: kernel-0:2.6.32-431.53.2.el6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: kernel-rt-0:3.10.0-229.1.2.rt56.141.2.el7_1
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 7Fixed in: kernel-0:3.10.0-229.1.2.el7
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise MRG 2Fixed in: kernel-rt-1:3.10.0-229.rt56.147.el6rt
View patch

Vendor Advisories (1)

redhatCVE-2015-1421Important

kernel: net: slab corruption from use after free on INIT collisions

Jan 22, 2015

References

git.kernel.org
lists.opensuse.org / opensuse-security-announce/2015-05/msg00001.html
Mailing ListThird Party Advisory
lists.opensuse.org / opensuse-security-announce/2015-09/msg00004.html
Mailing ListThird Party Advisory
rhn.redhat.com / errata/RHSA-2015-0726.html
Third Party Advisory
rhn.redhat.com / errata/RHSA-2015-0751.html
Third Party Advisory
rhn.redhat.com / errata/RHSA-2015-0782.html
Third Party Advisory
rhn.redhat.com / errata/RHSA-2015-0864.html
Third Party Advisory
rhn.redhat.com / errata/RHSA-2015-1082.html
Third Party Advisory
bugzilla.redhat.com / show_bug.cgi
Issue TrackingThird Party Advisory
github.com / torvalds/linux/commit/600ddd6825543962fb807884169e57b580dba208
Third Party Advisory
debian.org / security/2015/dsa-3170
Third Party Advisory
kernel.org / pub/linux/kernel/v3.x/ChangeLog-3.18.8
Vendor Advisory
openwall.com / lists/oss-security/2015/01/29/15
Mailing ListThird Party Advisory
securityfocus.com / bid/72356
Third Party AdvisoryVDB Entry
securitytracker.com / id/1032172
Third Party AdvisoryVDB Entry
ubuntu.com / usn/USN-2541-1
Third Party Advisory
ubuntu.com / usn/USN-2542-1
Third Party Advisory
ubuntu.com / usn/USN-2545-1
Third Party Advisory
ubuntu.com / usn/USN-2546-1
Third Party Advisory
ubuntu.com / usn/USN-2562-1
Third Party Advisory
ubuntu.com / usn/USN-2563-1
Third Party Advisory