CVE-2015-2672

Severity: medium (CVSS 5.5 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2016-05-02 · updated 2026-06-17
Weakness: CWE-20

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

Linux kernel: through 3.19.1

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
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

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