CVE-2015-2672 Information

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.

CVSS Vector

CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Reference

http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=06c8173eb92bbfc03a0fe8bb64315857d0badd06 http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.19.2 http://www.openwall.com/lists/oss-security/2015/03/22/1 https://bugzilla.redhat.com/show_bug.cgi?id=1204729 https://github.com/torvalds/linux/commit/06c8173eb92bbfc03a0fe8bb64315857d0badd06

Attack Complexity

LOW

Privileges Required

LOW

User Interaction Required

LOW

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

5.5