What is CVE-2025-40176?

CVE-2025-40176 is a critical-severity vulnerability in Linux. CVSS score: 9.8/10. Published 2025-11-12.

How severe is CVE-2025-40176?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Linux

CVE-2025-40176

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.

EPSS: 0.002 (8.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Linux — versions 84c61fe1a75b4255df1e1e7c054c9e6d048da417, 6.0, 0

References

Frequently asked questions

What is CVE-2025-40176?: CVE-2025-40176 is a critical-severity vulnerability in Linux. CVSS score: 9.8/10. Published 2025-11-12.
How severe is CVE-2025-40176?: Critical severity. CVSS v3 base score is 9.8 out of 10.