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CVE-2026-23412

7.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: netfilter: bpf: defer hook memory release until rcu readers are done Yiming Qian reports UaF when concurrent process is dumping…

Published Apr 2, 2026CWE-416EPSS 0.12%

Overview

CVE-2026-23412 is a high-severity vulnerability. It was published on April 2, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

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

netfilter: bpf: defer hook memory release until rcu readers are done

Yiming Qian reports UaF when concurrent process is dumping hooks via

nfnetlink_hooks:

BUG: KASAN: slab-use-after-free in nfnl_hook_dump_one.isra.0+0xe71/0x10f0

Read of size 8 at addr ffff888003edbf88 by task poc/79

Call Trace:

<TASK>

nfnl_hook_dump_one.isra.0+0xe71/0x10f0

netlink_dump+0x554/0x12b0

nfnl_hook_get+0x176/0x230

[..]

Defer release until after concurrent readers have completed.

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/24f90fa3994b992d1a09003a3db2599330a5232aRefgit.kernel.org/stable/c/54244d54a971c26a0cd0a9073460ff71f3c51b32Refgit.kernel.org/stable/c/c25e0dec366ae99b7264324ce3c7cbaea34691f9Refgit.kernel.org/stable/c/cb2bf5efdb02a2a59faf603604a1066e8266f349Refgit.kernel.org/stable/c/d016c216bc75c45128160593a77b864a04dbe7c0

How CyberStrike helps

Frequently asked questions

What is CVE-2026-23412?

CVE-2026-23412 is a high-severity vulnerability. It was published on April 2, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-23412?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-23412?

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-2026-23412?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-23412 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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