Out-of-bounds Write Affecting qemu-user-static-aarch64-debuginfo package, versions <2:11.0.0-4.amzn2023


Severity

Recommended
0.0
high
0
10

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.19% (8th percentile)

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  • Snyk IDSNYK-AMZN2023-QEMUUSERSTATICAARCH64DEBUGINFO-21701220
  • published25 Oct 2026
  • disclosed18 Sept 2026

Introduced: 18 Sep 2026

CVE-2026-81627  (opens in a new tab)
CWE-787  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 qemu-user-static-aarch64-debuginfo to version 2:11.0.0-4.amzn2023 or higher.
This issue was patched in ALAS2023-2026-3241.

NVD Description

Note: Versions mentioned in the description apply only to the upstream qemu-user-static-aarch64-debuginfo package and not the qemu-user-static-aarch64-debuginfo package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2023 relevant fixed versions and status.

A flaw was found in QEMU. The VAPIC setup hypercall in hw/i386/vapic.c does not validate that the writable RAM alias remains within the option ROM window. A privileged guest user on a Q35/KVM machine can position this alias over locked SMRAM, bypassing chipset D_LCK protection and injecting code into System Management Mode memory.

CVSS Base Scores

version 3.1