Processor Optimization Removal or Modification of Security-critical Code Affecting perf6.18-debuginfo package, versions <1:6.18.20-20.229.amzn2023


Severity

Recommended
high

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.01% (4th percentile)

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  • Snyk IDSNYK-AMZN2023-PERF618DEBUGINFO-16351609
  • published3 May 2026
  • disclosed25 Mar 2026

Introduced: 25 Mar 2026

CVE-2026-23354  (opens in a new tab)
CWE-1037  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 perf6.18-debuginfo to version 1:6.18.20-20.229.amzn2023 or higher.
This issue was patched in ALAS2023-2026-1596.

NVD Description

Note: Versions mentioned in the description apply only to the upstream perf6.18-debuginfo package and not the perf6.18-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:

x86/fred: Correct speculative safety in fred_extint()

array_index_nospec() is no use if the result gets spilled to the stack, as it makes the believed safe-under-speculation value subject to memory predictions.

For all practical purposes, this means array_index_nospec() must be used in the expression that accesses the array.

As the code currently stands, it's the wrong side of irqentry_enter(), and 'index' is put into %ebp across the function call.

Remove the index variable and reposition array_index_nospec(), so it's calculated immediately before the array access.

CVSS Base Scores

version 3.1