Incorrect Authorization Affecting linux-qemu-6.18 package, versions <6.18.10-r0


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.04% (11th percentile)

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  • Snyk IDSNYK-CHAINGUARDLATEST-LINUXQEMU618-15043954
  • published21 Jan 2026
  • disclosed9 Apr 2019

Introduced: 9 Apr 2019

CVE-2019-3887  (opens in a new tab)
CWE-863  (opens in a new tab)

How to fix?

Upgrade Chainguard linux-qemu-6.18 to version 6.18.10-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream linux-qemu-6.18 package and not the linux-qemu-6.18 package as distributed by Chainguard. See How to fix? for Chainguard relevant fixed versions and status.

A flaw was found in the way KVM hypervisor handled x2APIC Machine Specific Rregister (MSR) access with nested(=1) virtualization enabled. In that, L1 guest could access L0's APIC register values via L2 guest, when 'virtualize x2APIC mode' is enabled. A guest could use this flaw to potentially crash the host kernel resulting in DoS issue. Kernel versions from 4.16 and newer are vulnerable to this issue.

CVSS Base Scores

version 3.1