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Fencer Intel
medium 4.9

CVE-2015-3332 json

A certain backport in the TCP Fast Open implementation for the Linux kernel before 3.18 does not properly maintain a count value, which all…

published 11y ago modified 4mo ago also EUVD-2015-3378

cvss
4.9
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
0.4%
EPSS 0.4% chance of exploitation in 30 days, percentile 32%
public exploits
0
none known

Summary

A certain backport in the TCP Fast Open implementation for the Linux kernel before 3.18 does not properly maintain a count value, which allow local users to cause a denial of service (system crash) via the Fast Open feature, as demonstrated by visiting the chrome://flags/#enable-tcp-fast-open URL when using certain 3.10.x through 3.16.x kernel builds, including longterm-maintenance releases and ckt (aka Canonical Kernel Team) builds.

Patch / fix

  • linux Debian 14, Debian 13, Debian 12 3.16.7-ckt9-3

debian advisories DEBIAN-CVE-2015-3332

  • linux Ubuntu 14.04 LTS 3.13.0-53.89
  • linux-lts-utopic Ubuntu 14.04 LTS 3.16.0-38.52~14.04.1

ubuntu advisories UBUNTU-CVE-2015-3332

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • kernel-ec2 SLE Module for Public Cloud 12 3.12.43-52.6.1
  • kernel-xen SLES for SAP 12, SLES 12, SLED 12 3.12.43-52.6.1
  • kernel-syms SLES for SAP 12, SLES 12, SLED 12 3.12.43-52.6.1
  • kernel-source SLES for SAP 12, SLES 12, SLED 12 3.12.43-52.6.1
  • kernel-default SLES for SAP 12, SLES 12, SLED 12 +1 more 3.12.43-52.6.1
  • kernel-obs-build SLE Software Development Kit 12 3.12.43-52.6.2
  • kgraft-patch-SLE12_Update_5 SLE Live Patching 12 1-2.3

suse advisories SUSE-SU-2015:1071-1

Is CVE-2015-3332 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2015-3332 updated cvss 4.7

kernel: TCP Fast Open local DoS

  • Red Hat Enterprise Linux 5 kernel Red Hat Enterprise Linux 6 perf, kernel, python-perf, kernel-kdump, kernel-firmware, kernel-bootwrapper, +1 more Red Hat Enterprise Linux 7 perf, kernel, bpftool, kernel-rt, python-perf, kernel-kdump, +9 more Red Hat Enterprise MRG 2 kernel-rt, mrg-rt-release, kernel-rt-trace, kernel-rt-vanilla, kernel-rt-firmware
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.38% chance of exploitation in the next 30 days, higher than 32% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 4.9 AV:L/AC:L/Au:N/C:N/I:N/A:C

Classification

Weakness
  • CWE-399 Resource Management Errors
Technology feeds

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Remove ridiculous wildcard distro entries.