Deadlock Affecting kernel-libbpf-debuginfo package, versions <1:6.1.168-202.320.amzn2023


Severity

Recommended
high

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.01% (2nd percentile)

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  • Snyk IDSNYK-AMZN2023-KERNELLIBBPFDEBUGINFO-16627280
  • published10 May 2026
  • disclosed22 Apr 2026

Introduced: 22 Apr 2026

NewCVE-2026-31480  (opens in a new tab)
CWE-833  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 kernel-libbpf-debuginfo to version 1:6.1.168-202.320.amzn2023 or higher.
This issue was patched in ALAS2023-2026-1681.

NVD Description

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

tracing: Fix potential deadlock in cpu hotplug with osnoise

The following sequence may leads deadlock in cpu hotplug:

task1        task2        task3
-----        -----        -----

mutex_lock(&interface_lock)

        [CPU GOING OFFLINE]

    cpus_write_lock();
    osnoise_cpu_die();
      kthread_stop(task3);
        wait_for_completion();

              osnoise_sleep();
                mutex_lock(&amp;amp;interface_lock);

cpus_read_lock();

[DEAD LOCK]

Fix by swap the order of cpus_read_lock() and mutex_lock(&interface_lock).

CVSS Base Scores

version 3.1