Incorrect Authorization Affecting linux-qemu-melange package, versions <6.18.16-r0


Severity

Recommended
0.0
medium
0
10

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Threat Intelligence

EPSS
0.36% (28th percentile)

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  • Snyk IDSNYK-CHAINGUARDLATEST-LINUXQEMUMELANGE-15338431
  • published24 Feb 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-melange to version 6.18.16-r0 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream linux-qemu-melange package and not the linux-qemu-melange 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