Integer overflow in the xfs_acl_from_disk function in fs/xfs/xfs_acl.c in the Linux kernel before 3.1.9 allows local users to cause a denial of service (panic) via a filesystem with a malformed ACL, leading to a heap-based buffer overflow.
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://www.openwall.com/lists/oss-security/2012/01/10/11 | mailing list third party advisory patch |
| https://github.com/torvalds/linux/commit/fa8b18edd752a8b4e9d1ee2cd615b82c93cf8bba | third party advisory patch |
| http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=fa8b18edd752a8b4e9d1ee2cd615b82c93cf8bba | |
| http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git%3Ba=commit%3Bh=093019cf1b18dd31b2c3b77acce4e000e2cbc9ce | |
| https://bugzilla.redhat.com/show_bug.cgi?id=773280 | issue tracking third party advisory patch |
| https://github.com/torvalds/linux/commit/093019cf1b18dd31b2c3b77acce4e000e2cbc9ce | third party advisory patch |
| http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.1.9 | mailing list patch vendor advisory |