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CVE-2017-12168

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Date: September 20, 2017

The access_pmu_evcntr function in arch/arm64/kvm/sys_regs.c in the Linux kernel before 4.8.11 allows privileged KVM guest OS users to cause a denial of service (assertion failure and host OS crash) by accessing the Performance Monitors Cycle Count Register (PMCCNTR).

Language: C

Severity Score

Related Resources (7)

https://bugzilla.redhat.com/show_bug.cgi?id=1492984
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=9e3f7a29694049edd728e2400ab57ad7553e5aa9
https://github.com/torvalds/linux/commit/9e3f7a29694049edd728e2400ab57ad7553e5aa9
https://nvd.nist.gov/vuln/detail/CVE-2017-12168
http://www.kernel.org/pub/linux/kernel/v4.x/ChangeLog-4.8.11
https://access.redhat.com/security/cve/CVE-2017-12168
https://www.mend.io/vulnerability-database/CVE-2017-12168

Severity Score

Weakness Type (CWE)

Input Validation

CWE-20

Reachable Assertion

CWE-617

Top Fix

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CVSS v3.1

Base Score:
Attack Vector (AV): LOCAL
Attack Complexity (AC): LOW
Privileges Required (PR): HIGH
User Interaction (UI): NONE
Scope (S): CHANGED
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): HIGH

CVSS v2

Base Score:
Access Vector (AV): LOCAL
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): NONE
Integrity (I): NONE
Availability (A): COMPLETE
Additional information:

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