Description
The xsave/xrstor implementation in arch/x86/include/asm/xsave.h in the Linux kernel before 3.19.2 creates certain .altinstr_replacement pointers and consequently does not provide any protection against instruction faulting, which allows local users to cause a denial of service (panic) by triggering a fault, as demonstrated by an unaligned memory operand or a non-canonical address memory operand.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
n/a n/a
n/aaffected
References
- http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.19.2 ↗
- http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=06c8173eb92bbfc03a0fe8bb64315857d0badd06 ↗
- https://github.com/torvalds/linux/commit/06c8173eb92bbfc03a0fe8bb64315857d0badd06 ↗
- http://www.openwall.com/lists/oss-security/2015/03/22/1 ↗
- https://bugzilla.redhat.com/show_bug.cgi?id=1204729 ↗