CVE-2012-4565

Severity: medium (CVSS 4.7 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: yes
Published: 2012-12-21 · updated 2026-06-16
Weakness: CWE-189

Description

The tcp_illinois_info function in net/ipv4/tcp_illinois.c in the Linux kernel before 3.4.19, when the net.ipv4.tcp_congestion_control illinois setting is enabled, allows local users to cause a denial of service (divide-by-zero error and OOPS) by reading TCP stats.

Affected products

Linux kernel: through 3.4.18; 3.4.1, 3.4.2, 3.4.3, 3.4.4, 3.4.5, 3.4.6 (+11)

References

http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=8f363b77ee4fbf7c3bbcf5ec2c5ca482d396d664
http://lists.fedoraproject.org/pipermail/package-announce/2012-November/091110.html
http://rhn.redhat.com/errata/RHSA-2012-1580.html
http://secunia.com/advisories/51409
http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.4.19
http://www.openwall.com/lists/oss-security/2012/10/31/5
http://www.securityfocus.com/bid/56346
http://www.ubuntu.com/usn/USN-1644-1
http://www.ubuntu.com/usn/USN-1645-1
http://www.ubuntu.com/usn/USN-1646-1
http://www.ubuntu.com/usn/USN-1647-1
http://www.ubuntu.com/usn/USN-1648-1

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