CVE-2009-3624

Name	CVE-2009-3624
Description	The get_instantiation_keyring function in security/keys/keyctl.c in the KEYS subsystem in the Linux kernel before 2.6.32-rc5 does not properly maintain the reference count of a keyring, which allows local users to gain privileges or cause a denial of service (OOPS) via vectors involving calls to this function without specifying a keyring by ID, as demonstrated by a series of keyctl request2 and keyctl list commands.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, 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)	2.6.31-2	low
linux-2.6.24	source	(unstable)	(not affected)

Notes

[etch] - linux-2.6 <not-affected> (vulnerable code introduced in 2.6.29)
[lenny] - linux-2.6 <not-affected> (vulnerable code introduced in 2.6.29)
- linux-2.6.24 <not-affected> (vulnerable code introduced in 2.6.29)
fixed upstream in 2.6.32-rc5