| Summary: | Kernel : kvm: memory leak when memory slot is moved with assigned device (CVE-2013-4592) | ||
|---|---|---|---|
| Product: | Gentoo Security | Reporter: | Agostino Sarubbo <ago> |
| Component: | Kernel | Assignee: | Gentoo Kernel Security <security-kernel> |
| Status: | RESOLVED FIXED | ||
| Severity: | normal | CC: | kernel |
| Priority: | Normal | ||
| Version: | unspecified | ||
| Hardware: | All | ||
| OS: | Linux | ||
| URL: | https://bugzilla.redhat.com/show_bug.cgi?id=1031702 | ||
| Whiteboard: | |||
| Package list: | Runtime testing required: | --- | |
CVE-2013-4592 (http://nvd.nist.gov/nvd.cfm?cvename=CVE-2013-4592): Memory leak in the __kvm_set_memory_region function in virt/kvm/kvm_main.c in the Linux kernel before 3.9 allows local users to cause a denial of service (memory consumption) by leveraging certain device access to trigger movement of memory slots. Fixes in 3.4.72 onward |
From ${URL} : When a user memory slot is moved (ie. the base_gfn changes), iommu pages are neither unpinned nor unmapped. The memory for these pages then cannot be recovered without rebooting the system. Local user with ability to assign device (with access to PCI sysfs files for a device) could use this flaw to DoS the system. Upstream fixes: http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=12d6e7538e2d418c08f082b1b44ffa5fb7270ed8 http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=e40f193f5bb022e927a57a4f5d5194e4f12ddb74