CVE-2015-2672

MEDIUM

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.

References

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

Details

Source: MITRE

Published: 2016-05-02

Updated: 2016-05-06

Type: CWE-20

Risk Information

CVSS v2.0

Base Score: 4.9

Vector: AV:L/AC:L/Au:N/C:N/I:N/A:C

Impact Score: 6.9

Exploitability Score: 3.9

Severity: MEDIUM

CVSS v3.0

Base Score: 5.5

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

Impact Score: 3.6

Exploitability Score: 1.8

Severity: MEDIUM