CVE-2025-40176 Affecting kernel-source package, versions <6.4.0-150600.23.81.2


Severity

Recommended
0.0
high
0
10

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.04% (10th percentile)

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  • Snyk IDSNYK-SLES156-KERNELSOURCE-14464976
  • published18 Dec 2025
  • disclosed17 Dec 2025

Introduced: 17 Dec 2025

CVE-2025-40176  (opens in a new tab)

How to fix?

Upgrade SLES:15.6 kernel-source to version 6.4.0-150600.23.81.2 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-source package and not the kernel-source package as distributed by SLES. See How to fix? for SLES:15.6 relevant fixed versions and status.

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

tls: wait for pending async decryptions if tls_strp_msg_hold fails

Async decryption calls tls_strp_msg_hold to create a clone of the input skb to hold references to the memory it uses. If we fail to allocate that clone, proceeding with async decryption can lead to various issues (UAF on the skb, writing into userspace memory after the recv() call has returned).

In this case, wait for all pending decryption requests.

CVSS Base Scores

version 3.1