Race Condition The advisory has been revoked - it doesn't affect any version of package kernel-cross-headers (opens in a new tab)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-RHEL9-KERNELCROSSHEADERS-10048664
- published6 May 2025
- disclosed27 Mar 2025
Introduced: 27 Mar 2025
CVE-2023-53020 (opens in a new tab)Amendment
The Red Hat security team deemed this advisory irrelevant for RHEL:9.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-cross-headers package and not the kernel-cross-headers package as distributed by RHEL.
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:
It modifies the tunnel socket after publishing it.
It calls setup_udp_tunnel_sock() on an existing socket without locking.
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().
References
- https://access.redhat.com/security/cve/CVE-2023-53020
- https://git.kernel.org/stable/c/0b2c59720e65885a394a017d0cf9cab118914682
- https://git.kernel.org/stable/c/2d77e5c0ad79004b5ef901895437e9cce6dfcc7e
- https://git.kernel.org/stable/c/77e8ed776cdb1a24b2aab8fe7c6f1f154235e1ce
- https://git.kernel.org/stable/c/cef0845b6dcfa2f6c2c832e7f9622551456c741d