Improper Resource Locking 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% (2nd percentile)

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  • Snyk IDSNYK-AMZN2023-PERF618DEBUGINFO-16709783
  • published16 May 2026
  • disclosed5 May 2026

Introduced: 5 May 2026

NewCVE-2026-43061  (opens in a new tab)
CWE-413  (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:

serial: 8250: Fix TX deadlock when using DMA

dmaengine_terminate_async does not guarantee that the __dma_tx_complete callback will run. The callback is currently the only place where dma-&gt;tx_running gets cleared. If the transaction is canceled and the callback never runs, then dma-&gt;tx_running will never get cleared and we will never schedule new TX DMA transactions again.

This change makes it so we clear dma-&gt;tx_running after we terminate the DMA transaction. This is "safe" because serial8250_tx_dma_flush is holding the UART port lock. The first thing the callback does is also grab the UART port lock, so access to dma-&gt;tx_running is serialized.

CVSS Base Scores

version 3.1