Incorrect Synchronization Affecting kernel package, versions <1:6.1.176-220.358.amzn2023


Severity

Recommended
high

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.43% (35th percentile)

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  • Snyk IDSNYK-AMZN2023-KERNEL-17888131
  • published8 Jul 2026
  • disclosed28 May 2026

Introduced: 28 May 2026

CVE-2026-46137  (opens in a new tab)
CWE-821  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 kernel to version 1:6.1.176-220.358.amzn2023 or higher.
This issue was patched in ALAS2023-2026-1924.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel package and not the kernel 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:

mptcp: pm: ADD_ADDR rtx: fix potential data-race

This mptcp_pm_add_timer() helper is executed as a timer callback in softirq context. To avoid any data races, the socket lock needs to be held with bh_lock_sock().

If the socket is in use, retry again soon after, similar to what is done with the keepalive timer.

CVSS Base Scores

version 3.1