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CVE-2026-68397

8.8 · HIGH

In the Linux kernel, the following vulnerability has been resolved: net/iucv: take a reference on the socket found in afiucv_hs_rcv() afiucv_hs_rcv() looks up the destination socket under iucv_sk…

Published Aug 10, 2026EPSS 0.26%

Overview

CVE-2026-68397 is a high-severity vulnerability. It was published on August 10, 2026 and has a CVSS 3.1 base score of 8.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical description

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

net/iucv: take a reference on the socket found in afiucv_hs_rcv()

afiucv_hs_rcv() looks up the destination socket under iucv_sk_list.lock,

drops the lock, and then passes the socket to the afiucv_hs_callback_*()

handlers without holding a reference. AF_IUCV sockets are not

RCU-protected and are freed synchronously by iucv_sock_kill() ->

sock_put(), so a concurrent close can free the socket in the window

between read_unlock() and the handler, which then dereferences freed

memory (for example sk->sk_data_ready() in afiucv_hs_callback_syn()).

Take a reference with sock_hold() while the socket is still on the list

and release it with sock_put() once the handler has run.

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/1801cb20a5025a787d6853e19c38db138344b4b4Refgit.kernel.org/stable/c/4dc0e63abf8bc7ba8892e617c1fb8b204361e022Refgit.kernel.org/stable/c/4fa349156043dc119721d067329714179f501749Refgit.kernel.org/stable/c/5595ea59cdf29182cf6a270cacc1426c57b603deRefgit.kernel.org/stable/c/5739be5c19495d709d902a2912c9102ce78740d5Refgit.kernel.org/stable/c/bc6c6e546ffff8865daaeb622ef348c2d481e80fRefgit.kernel.org/stable/c/c75a950e77356e526672cba4584080c6c8b793b6Refgit.kernel.org/stable/c/e3e0679fc950191aff8f27fa78abcfc2462cff4a

How CyberStrike helps

Frequently asked questions

What is CVE-2026-68397?

CVE-2026-68397 is a high-severity vulnerability. It was published on August 10, 2026 and has a CVSS 3.1 base score of 8.8 (HIGH).

How severe is CVE-2026-68397?

This vulnerability has a CVSS 3.1 base score of 8.8, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-68397?

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-2026-68397?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-68397 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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