CVE-2023-53020 Affecting rtla package, versions *


Severity

Recommended
low

Based on CentOS security rating.

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  • Snyk IDSNYK-CENTOS9-RTLA-9547440
  • published28 Mar 2025
  • disclosed27 Mar 2025

Introduced: 27 Mar 2025

NewCVE-2023-53020  (opens in a new tab)

How to fix?

There is no fixed version for Centos:9 rtla.

NVD Description

Note: Versions mentioned in the description apply only to the upstream rtla package and not the rtla package as distributed by Centos. See How to fix? for Centos:9 relevant fixed versions and status.

In the Linux kernel, the following vulnerability has been resolved:

l2tp: close all race conditions in l2tp_tunnel_register()

The code in l2tp_tunnel_register() is racy in several ways:

  1. It modifies the tunnel socket after publishing it.

  2. It calls setup_udp_tunnel_sock() on an existing socket without locking.

  3. It changes sock lock class on fly, which triggers many syzbot reports.

This patch amends all of them by moving socket initialization code before publishing and under sock lock. As suggested by Jakub, the l2tp lockdep class is not necessary as we can just switch to bh_lock_sock_nested().

CVSS Base Scores

version 3.1