CVE-2009-2844

Name	CVE-2009-2844
Description	cfg80211 in net/wireless/scan.c in the Linux kernel 2.6.30-rc1 and other versions before 2.6.31-rc6 allows remote attackers to cause a denial of service (crash) via a sequence of beacon frames in which one frame omits an SSID Information Element (IE) and the subsequent frame contains an SSID IE, which triggers a NULL pointer dereference in the cmp_ies function. NOTE: a potential weakness in the is_mesh function was also addressed, but the relevant condition did not exist in the code, so it is not a vulnerability.
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)	2.6.30-7	medium
linux-2.6.24	source	(unstable)	(not affected)

Notes

[etch] - linux-2.6 <not-affected> (vulnerability introduced in 2.6.30)
[lenny] - linux-2.6 <not-affected> (vulnerability introduced in 2.6.30)
- linux-2.6.24 <not-affected> (vulnerability introduced in 2.6.30)