Bug 325581 (CVE-2008-7256)

Summary:	Kernel: overcomit NULL pointer dereference (CVE-2008-7256)
Product:	Gentoo Security	Reporter:	Stefan Behte (RETIRED) <craig>
Component:	Kernel	Assignee:	Gentoo Security <security>
Status:	RESOLVED FIXED
Severity:	normal	CC:	hardened, kernel
Priority:	High
Version:	unspecified
Hardware:	All
OS:	Linux
URL:	https://bugzilla.redhat.com/show_bug.cgi?id=595970
Whiteboard:	[ linux < 2.6.28-rc8 ]
Package list:		Runtime testing required:	---

Description Stefan Behte (RETIRED) gentoo-dev

2010-06-25 20:18:02 UTC

CVE-2008-7256 (http://nvd.nist.gov/nvd.cfm?cvename=CVE-2008-7256):
  mm/shmem.c in the Linux kernel before 2.6.28-rc8, when strict
  overcommit is enabled and CONFIG_SECURITY is disabled, does not
  properly handle the export of shmemfs objects by knfsd, which allows
  attackers to cause a denial of service (NULL pointer dereference and
  knfsd crash) or possibly have unspecified other impact via unknown
  vectors.  NOTE: this vulnerability exists because of an incomplete
  fix for CVE-2010-1643.