CVE-2009-4272

Name	CVE-2009-4272
Description	A certain Red Hat patch for net/ipv4/route.c in the Linux kernel 2.6.18 on Red Hat Enterprise Linux (RHEL) 5 allows remote attackers to cause a denial of service (deadlock) via crafted packets that force collisions in the IPv4 routing hash table, and trigger a routing "emergency" in which a hash chain is too long. NOTE: this is related to an issue in the Linux kernel before 2.6.31, when the kernel routing cache is disabled, involving an uninitialized pointer and a panic.
Source	CVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency
linux-2.6	source	etch	(not affected)
linux-2.6	source	lenny	(not affected)
linux-2.6	source	(unstable)	2.6.31-1	medium
linux-2.6.24	source	(unstable)	(not affected)

Notes

[lenny] - linux-2.6 <not-affected> (vulnerable code introduced in 2.6.27)
[etch] - linux-2.6 <not-affected> (vulnerable code introduced in 2.6.27)
- linux-2.6.24 <not-affected> (vulnerable code introduced in 2.6.27)
https://bugzilla.redhat.com/show_bug.cgi?id=545411