Integer overflow in the agp_generic_insert_memory function in drivers/char/agp/generic.c in the Linux kernel before 2.6.38.5 allows local users to gain privileges or cause a denial of service (system crash) via a crafted AGPIOC_BIND agp_ioctl ioctl call.
The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.
| Link | Tags |
|---|---|
| http://rhn.redhat.com/errata/RHSA-2011-0927.html | third party advisory vendor advisory |
| http://openwall.com/lists/oss-security/2011/04/21/4 | mailing list patch |
| https://bugzilla.redhat.com/show_bug.cgi?id=698996 | issue tracking third party advisory patch |
| http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=194b3da873fd334ef183806db751473512af29ce | |
| https://lkml.org/lkml/2011/4/14/293 | mailing list third party advisory patch |
| http://openwall.com/lists/oss-security/2011/04/22/7 | mailing list third party advisory patch |
| http://www.kernel.org/pub/linux/kernel/v2.6/ChangeLog-2.6.38.5 | release notes vendor advisory |
| http://www.securityfocus.com/bid/47534 | vdb entry third party advisory |