drivers/vfio/pci/vfio_pci_intrs.c in the Linux kernel through 4.8.11 misuses the kzalloc function, which allows local users to cause a denial of service (integer overflow) or have unspecified other impact by leveraging access to a vfio PCI device file.
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 |
|---|---|
| https://bugzilla.redhat.com/show_bug.cgi?id=1389259 | issue tracking |
| http://www.openwall.com/lists/oss-security/2016/10/26/11 | third party advisory mailing list |
| http://www.securityfocus.com/bid/93930 | vdb entry |
| https://patchwork.kernel.org/patch/9373631/ | patch |
| http://rhn.redhat.com/errata/RHSA-2017-0387.html | vendor advisory |
| http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=05692d7005a364add85c6e25a6c4447ce08f913a | issue tracking patch vendor advisory |
| https://github.com/torvalds/linux/commit/05692d7005a364add85c6e25a6c4447ce08f913a | issue tracking third party advisory patch |
| http://rhn.redhat.com/errata/RHSA-2017-0386.html | vendor advisory |