CVE-2026-74401: dlm: fix add msg handle in send_queue ordered

Published Aug 15, 2026
·
Updated

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

dlm: fix add msg handle in sendqueue ordered

In a benchmark scenario triggering a lot of requests that triggers a lot of DLM messages on the network it can be that the mh->seq is not ordered according the oldest seq number. This ordering is required by dlmreceiveack as "before(mh->seq, seq)" will stop to check for older sequence numbers that are ordered in the tail of "node->sendqueue".

The side effects of not having it correct ordered regarding "before(mh->seq, seq)" are refcounting issues and use-after free.

I only was able to reproduce this issue in a experimental DLM branch and a user space DLM benchmark that uses iouring. After changing this I don't experienced any refcounting with the sending buffer issues anymore.

Event History

Aug 15, 2026
CVE Published
via MITRE·05:59 AM
Data Sourced
via MITRE·05:59 AM
Description
Free Weekly Intel

Don't miss critical vulnerabilities

Join thousands of security professionals who receive our weekly digest of trending CVEs, zero-days, and exploited vulnerabilities.

No spam. Unsubscribe anytime.

Company

Resources

Contact

SecAlerts Pty Ltd.
132 Wickham Terrace
Fortitude Valley,
QLD 4006, Australia
info@secalerts.co
By using SecAlerts services, you agree to our services end-user license agreement. This website is safeguarded by reCAPTCHA and governed by the Google Privacy Policy and Terms of Service. All names, logos, and brands of products are owned by their respective owners, and any usage of these names, logos, and brands for identification purposes only does not imply endorsement. If you possess any content that requires removal, please get in touch with us.
© 2026 SecAlerts Pty Ltd.
ABN: 70 645 966 203, ACN: 645 966 203