CVE-2025-37885 Affecting kernel6.12-debuginfo package, versions <0:6.12.29-33.102.amzn2023


Severity

Recommended
high

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.04% (10th percentile)

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  • Snyk IDSNYK-AMZN2023-KERNEL612DEBUGINFO-11471639
  • published5 Aug 2025
  • disclosed9 May 2025

Introduced: 9 May 2025

CVE-2025-37885  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 kernel6.12-debuginfo to version 0:6.12.29-33.102.amzn2023 or higher.
This issue was patched in ALAS2023-2025-994.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel6.12-debuginfo package and not the kernel6.12-debuginfo package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2023 relevant fixed versions and status.

In the Linux kernel, the following vulnerability has been resolved:

KVM: x86: Reset IRTE to host control if new route isn't postable

Restore an IRTE back to host control (remapped or posted MSI mode) if the new GSI route prevents posting the IRQ directly to a vCPU, regardless of the GSI routing type. Updating the IRTE if and only if the new GSI is an MSI results in KVM leaving an IRTE posting to a vCPU.

The dangling IRTE can result in interrupts being incorrectly delivered to the guest, and in the worst case scenario can result in use-after-free, e.g. if the VM is torn down, but the underlying host IRQ isn't freed.

CVSS Base Scores

version 3.1