The agp subsystem in the Linux kernel 2.6.38.5 and earlier does not properly restrict memory allocation by the (1) AGPIOC_RESERVE and (2) AGPIOC_ALLOCATE ioctls, which allows local users to cause a denial of service (memory consumption) by making many calls to these ioctls.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Linux_kernel | Linux | * | 2.6.38.5 (excluding) |
| Linux | Ubuntu | devel | * |
| Linux | Ubuntu | hardy | * |
| Linux | Ubuntu | lucid | * |
| Linux | Ubuntu | maverick | * |
| Linux | Ubuntu | natty | * |
| Linux | Ubuntu | oneiric | * |
| Linux | Ubuntu | precise | * |
| Linux | Ubuntu | quantal | * |
| Linux-ec2 | Ubuntu | lucid | * |
| Linux-ec2 | Ubuntu | maverick | * |
| Linux-lts-backport-maverick | Ubuntu | lucid | * |
| Linux-lts-backport-natty | Ubuntu | lucid | * |
| Linux-lts-backport-oneiric | Ubuntu | lucid | * |
| Linux-lts-quantal | Ubuntu | precise | * |
References
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=b522f02184b413955f3bc952e3776ce41edc6355
- http://openwall.com/lists/oss-security/2011/04/21/4
- http://openwall.com/lists/oss-security/2011/04/22/10
- http://openwall.com/lists/oss-security/2011/04/22/11
- http://openwall.com/lists/oss-security/2011/04/22/7
- http://openwall.com/lists/oss-security/2011/04/22/8
- http://openwall.com/lists/oss-security/2011/04/22/9
- http://securitytracker.com/id?1025441
- http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.38.5
- http://www.securityfocus.com/bid/47832
- https://bugzilla.redhat.com/show_bug.cgi?id=698999
- https://lkml.org/lkml/2011/4/14/294
- http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=b522f02184b413955f3bc952e3776ce41edc6355
- http://openwall.com/lists/oss-security/2011/04/21/4
- http://openwall.com/lists/oss-security/2011/04/22/10
- http://openwall.com/lists/oss-security/2011/04/22/11
- http://openwall.com/lists/oss-security/2011/04/22/7
- http://openwall.com/lists/oss-security/2011/04/22/8
- http://openwall.com/lists/oss-security/2011/04/22/9
- http://securitytracker.com/id?1025441
- http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.38.5
- http://www.securityfocus.com/bid/47832
- https://bugzilla.redhat.com/show_bug.cgi?id=698999
- https://lkml.org/lkml/2011/4/14/294