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CVE-2025-38734

9.8 · CRITICAL

In the Linux kernel, the following vulnerability has been resolved: net/smc: fix UAF on smcsk after smc_listen_out() BPF CI testing report a UAF issue: [ 16.446633] BUG: kernel NULL pointer…

Published Sep 5, 2025CWE-416EPSS 0.46%

Overview

CVE-2025-38734 is a critical-severity vulnerability. It was published on September 5, 2025 and has a CVSS 3.1 base score of 9.8 (CRITICAL).

This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

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

net/smc: fix UAF on smcsk after smc_listen_out()

BPF CI testing report a UAF issue:

[ 16.446633] BUG: kernel NULL pointer dereference, address: 000000000000003 0

[ 16.447134] #PF: supervisor read access in kernel mod e

[ 16.447516] #PF: error_code(0x0000) - not-present pag e

[ 16.447878] PGD 0 P4D 0

[ 16.448063] Oops: Oops: 0000 [#1] PREEMPT SMP NOPT I

[ 16.448409] CPU: 0 UID: 0 PID: 9 Comm: kworker/0:1 Tainted: G OE 6.13.0-rc3-g89e8a75fda73-dirty #4 2

[ 16.449124] Tainted: [O]=OOT_MODULE, [E]=UNSIGNED_MODUL E

[ 16.449502] Hardware name: QEMU Ubuntu 24.04 PC (i440FX + PIIX, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/201 4

[ 16.450201] Workqueue: smc_hs_wq smc_listen_wor k

[ 16.450531] RIP: 0010:smc_listen_work+0xc02/0x159 0

[ 16.452158] RSP: 0018:ffffb5ab40053d98 EFLAGS: 0001024 6

[ 16.452526] RAX: 0000000000000001 RBX: 0000000000000002 RCX: 00

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/070b4af44c4b6e4c35fb1ca7001a6a88fd2d318fRefgit.kernel.org/stable/c/2e765ba0ee0eae35688b443e97108308a716773eRefgit.kernel.org/stable/c/85545f1525f9fa9bf44fec77ba011024f15da342Refgit.kernel.org/stable/c/d9cef55ed49117bd63695446fb84b4b91815c0b4

How CyberStrike helps

Frequently asked questions

What is CVE-2025-38734?

CVE-2025-38734 is a critical-severity vulnerability. It was published on September 5, 2025 and has a CVSS 3.1 base score of 9.8 (CRITICAL).

How severe is CVE-2025-38734?

This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2025-38734?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2025-38734?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2025-38734 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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