CVE-2015-3332

Severity: medium (CVSS 4.9 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2015-05-27 · updated 2026-06-17
Weakness: CWE-399

Description

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.

Affected products

Debian Linux: all versions
Linux kernel: through 3.17.8

References

http://article.gmane.org/gmane.linux.network/359588
http://www.debian.org/security/2015/dsa-3237
http://www.openwall.com/lists/oss-security/2015/04/14/14
https://bugs.debian.org/782515
https://bugzilla.redhat.com/show_bug.cgi?id=1213951
http://article.gmane.org/gmane.linux.network/359588
http://www.debian.org/security/2015/dsa-3237
http://www.openwall.com/lists/oss-security/2015/04/14/14
https://bugs.debian.org/782515
https://bugzilla.redhat.com/show_bug.cgi?id=1213951

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