Improper Handling of Missing Special Element Affecting kernel-debug-devel-matched package, versions <0:5.14.0-503.11.1.el9_5


Severity

Recommended
medium

Based on CentOS security rating.

Threat Intelligence

EPSS
0.03% (7th percentile)

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  • Snyk IDSNYK-CENTOS9-KERNELDEBUGDEVELMATCHED-14762389
  • published31 Dec 2025
  • disclosed30 Dec 2025

Introduced: 30 Dec 2025

CVE-2023-54172  (opens in a new tab)
CWE-166  (opens in a new tab)

How to fix?

Upgrade Centos:9 kernel-debug-devel-matched to version 0:5.14.0-503.11.1.el9_5 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-debug-devel-matched package and not the kernel-debug-devel-matched package as distributed by Centos. See How to fix? for Centos:9 relevant fixed versions and status.

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

x86/hyperv: Disable IBT when hypercall page lacks ENDBR instruction

On hardware that supports Indirect Branch Tracking (IBT), Hyper-V VMs with ConfigVersion 9.3 or later support IBT in the guest. However, current versions of Hyper-V have a bug in that there's not an ENDBR64 instruction at the beginning of the hypercall page. Since hypercalls are made with an indirect call to the hypercall page, all hypercall attempts fail with an exception and Linux panics.

A Hyper-V fix is in progress to add ENDBR64. But guard against the Linux panic by clearing X86_FEATURE_IBT if the hypercall page doesn't start with ENDBR. The VM will boot and run without IBT.

If future Linux 32-bit kernels were to support IBT, additional hypercall page hackery would be needed to make IBT work for such kernels in a Hyper-V VM.

CVSS Base Scores

version 3.1