Time-of-check Time-of-use (TOCTOU) Affecting perf6.12-debuginfo package, versions <1:6.12.80-105.147.amzn2023


Severity

Recommended
high

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.01% (2nd percentile)

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications

Snyk Learn

Learn about Time-of-check Time-of-use (TOCTOU) vulnerabilities in an interactive lesson.

Start learning
  • Snyk IDSNYK-AMZN2023-PERF612DEBUGINFO-16625633
  • published10 May 2026
  • disclosed25 Apr 2026

Introduced: 25 Apr 2026

NewCVE-2026-31678  (opens in a new tab)
CWE-367  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 perf6.12-debuginfo to version 1:6.12.80-105.147.amzn2023 or higher.
This issue was patched in ALAS2023-2026-1646.

NVD Description

Note: Versions mentioned in the description apply only to the upstream perf6.12-debuginfo package and not the perf6.12-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:

openvswitch: defer tunnel netdev_put to RCU release

ovs_netdev_tunnel_destroy() may run after NETDEV_UNREGISTER already detached the device. Dropping the netdev reference in destroy can race with concurrent readers that still observe vport->dev.

Do not release vport->dev in ovs_netdev_tunnel_destroy(). Instead, let vport_netdev_free() drop the reference from the RCU callback, matching the non-tunnel destroy path and avoiding additional synchronization under RTNL.

CVSS Base Scores

version 3.1