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CVE-2017-12168· NVD / CVE Program· CNA redhat

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

Noroxi assessment

Priority: Monitor (action score 24/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.41% (FIRST EPSS).
  • Someone with local access to the system can trigger it. Administrator privileges are required. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: linux (Debian:12) 4.8.11-1; kernel (Red Hat:enterprise_linux:7::server) 0:4.11.0-44.el7a; kernel-abi-whitelists (Red Hat:enterprise_linux:7::server) 0:4.11.0-44.el7a.

Low priority for now. Upgrade to linux (Debian:12) 4.8.11-1; kernel (Red Hat:enterprise_linux:7::server) 0:4.11.0-44.el7a; kernel-abi-whitelists (Red Hat:enterprise_linux:7::server) 0:4.11.0-44.el7a or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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).

MediumCVSS 6.0 · v3.1—No exploit Fix available
Published
Sep 20, 2017
Updated
Jun 16, 2026
EPSS
0.4% · 34th percentile

Report tools

JSON

Action score

24

Monitor

Low priority for now.

CVSS
24 / 40 · 6.0 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.4%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

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When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
linuxlinux kernel

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • linux linux kernelup to 4.8.10 inclusive

Versions reported by the vendor

Affected version ranges reported by the assigning authority (redhat). Independent of NVD's CPE analysis and usually ahead of it.

  • n/a Linux kernel before 4.9

    • Linux kernel before 4.9affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 4.8.11-14.8.11-1
Red Hat:enterprise_linux:7::serverkernelbefore 0:4.11.0-44.el7a0:4.11.0-44.el7a
Red Hat:enterprise_linux:7::serverkernel-abi-whitelistsbefore 0:4.11.0-44.el7a0:4.11.0-44.el7a
Red Hat:enterprise_linux:7::serverkernel-altbefore 0:4.11.0-44.el7a0:4.11.0-44.el7a
Red Hat:enterprise_linux:7::serverkernel-bootwrapperbefore 0:4.11.0-44.el7a0:4.11.0-44.el7a
Red Hat:enterprise_linux:7::serverkernel-debugbefore 0:4.11.0-44.el7a0:4.11.0-44.el7a
Red Hat:enterprise_linux:7::serverkernel-debug-debuginfobefore 0:4.11.0-44.el7a0:4.11.0-44.el7a
Red Hat:enterprise_linux:7::serverkernel-debug-develbefore 0:4.11.0-44.el7a0:4.11.0-44.el7a
Red Hat:enterprise_linux:7::serverkernel-debuginfobefore 0:4.11.0-44.el7a0:4.11.0-44.el7a
Red Hat:enterprise_linux:7::serverkernel-debuginfo-common-aarch64before 0:4.11.0-44.el7a0:4.11.0-44.el7a
Red Hat:enterprise_linux:7::serverkernel-debuginfo-common-ppc64lebefore 0:4.11.0-44.el7a0:4.11.0-44.el7a
Red Hat:enterprise_linux:7::serverkernel-develbefore 0:4.11.0-44.el7a0:4.11.0-44.el7a
Red Hat:enterprise_linux:7::serverkernel-docbefore 0:4.11.0-44.el7a0:4.11.0-44.el7a
Red Hat:enterprise_linux:7::serverkernel-headersbefore 0:4.11.0-44.el7a0:4.11.0-44.el7a
Red Hat:enterprise_linux:7::serverkernel-toolsbefore 0:4.11.0-44.el7a0:4.11.0-44.el7a
Red Hat:enterprise_linux:7::serverkernel-tools-debuginfobefore 0:4.11.0-44.el7a0:4.11.0-44.el7a
Red Hat:enterprise_linux:7::serverkernel-tools-libsbefore 0:4.11.0-44.el7a0:4.11.0-44.el7a
Red Hat:enterprise_linux:7::serverkernel-tools-libs-develbefore 0:4.11.0-44.el7a0:4.11.0-44.el7a
Red Hat:enterprise_linux:7::serverperfbefore 0:4.11.0-44.el7a0:4.11.0-44.el7a
Red Hat:enterprise_linux:7::serverperf-debuginfobefore 0:4.11.0-44.el7a0:4.11.0-44.el7a
Red Hat:enterprise_linux:7::serverpython-perfbefore 0:4.11.0-44.el7a0:4.11.0-44.el7a
Red Hat:enterprise_linux:7::serverpython-perf-debuginfobefore 0:4.11.0-44.el7a0:4.11.0-44.el7a

Same product

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Other highest-scoring records for the same primary product.

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    85Now
  • CVE-2016-5195Race condition in mm/gup.c in the Linux kernel 2.x through 4.x before 4.8.3 allows local users to gain privileges by leveraging incorrect haKEV
    83Now

Published before and after this one in the same product

  • ← EarlierCVE-2017-14340Sep 15, 2017 · The XFS_IS_REALTIME_INODE macro in fs/xfs/xfs_linux.h in the Linux kernel before 4.13.2 does not verify that a filesystem has a realtime dev
    22Monitor
  • ← EarlierCVE-2017-14497Sep 15, 2017 · The tpacket_rcv function in net/packet/af_packet.c in the Linux kernel before 4.13 mishandles vnet headers, which might allow local users to
    31Monitor
  • Later →CVE-2017-12153Sep 21, 2017 · A security flaw was discovered in the nl80211_set_rekey_data() function in net/wireless/nl80211.c in the Linux kernel through 4.13.3.
    17Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
debian:linux4.8.11-1 · Debian:12Package registry (OSV)
red hat:kernel0:4.11.0-44.el7a · Red Hat:enterprise_linux:7::serverPackage registry (OSV)
red hat:kernel-abi-whitelists0:4.11.0-44.el7a · Red Hat:enterprise_linux:7::serverPackage registry (OSV)
red hat:kernel-alt0:4.11.0-44.el7a · Red Hat:enterprise_linux:7::serverPackage registry (OSV)
red hat:kernel-bootwrapper0:4.11.0-44.el7a · Red Hat:enterprise_linux:7::serverPackage registry (OSV)
red hat:kernel-debug0:4.11.0-44.el7a · Red Hat:enterprise_linux:7::serverPackage registry (OSV)
red hat:kernel-debug-debuginfo0:4.11.0-44.el7a · Red Hat:enterprise_linux:7::serverPackage registry (OSV)
red hat:kernel-debug-devel0:4.11.0-44.el7a · Red Hat:enterprise_linux:7::serverPackage registry (OSV)
red hat:kernel-debuginfo0:4.11.0-44.el7a · Red Hat:enterprise_linux:7::serverPackage registry (OSV)
red hat:kernel-debuginfo-common-aarch640:4.11.0-44.el7a · Red Hat:enterprise_linux:7::serverPackage registry (OSV)
red hat:kernel-debuginfo-common-ppc64le0:4.11.0-44.el7a · Red Hat:enterprise_linux:7::serverPackage registry (OSV)
red hat:kernel-devel0:4.11.0-44.el7a · Red Hat:enterprise_linux:7::serverPackage registry (OSV)
red hat:kernel-doc0:4.11.0-44.el7a · Red Hat:enterprise_linux:7::serverPackage registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • Administrator privileges are required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted

Impact can extend beyond the vulnerable component (scope changes).

Attack vector
Local
Attack complexity
Low
Privileges required
High
User interaction
None
Scope
Changed
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-617 · Reachable Assertion

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:N/I:N/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (3 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records