BIND 9.18.48 Crash upon Serve Stale Enabling, with general: critical: exiting (due to assertion failure) and Recursion Loop Detected

[Ibrahim Almahfooz]

Hi Ondřej,

We tested the same configurations shared in the first message of this
thread (having stale serve enabled) on three different BIND versions:

9.18.41 -> Crashed with assertion (within 5 minutes)
9.18.48 -> Crashed with an assertion (within 5 minutes)
9.20.22 -> Running normally with no crash so far :) for more than 24 hours

Thank you.

On Sun, 3 May 2026 at 13:06, Ondřej Surý <ondrej at isc.org> wrote:

>
> > On 3. 5. 2026, at 11:58, Ibrahim Almahfooz <ibrahim.nezar at sevennet.net>
> wrote:
> >
> > Is the "recursion loop detected" message in the logs considered normal
> when stale serve is enabled? or is it happening due to misconfiguration?
>
> All these domains are completely broken (each in a different way), so ...
> yes.
>
> > We tried 9.18.48 (latest of 9.18.x) also crashed with the same error
> within a couple of minutes. We will perform another upgrade to version
> 9.20.22 and see what happens.
>
> If you can reliably reproduce this, please fill
> https://gitlab.isc.org/isc-projects/bind9/-/issues/new?issuable_template=Security_issue
> and make sure you follow the template.
>
> Ondrej
> --
> Ondřej Surý (He/Him)
> ondrej at isc.org
>
> ADHD brain at work: I sometimes lose track of my inbox. Please feel free
> to send a gentle nudge if you're waiting on a reply!
>
> My working hours and your working hours may be different. Please do not
> feel obligated to reply outside your normal working hours.
>
>

-- 
Ibrahim Abdulatif

IT & System and Core Signaling Manager/Cyber Security Management

Sevennet Layers Co., LTD.



+964 (0) 53 511 5514 <+964+(0)+53+511+5514> | +964 (0) 770 471 5514
<+964+(0)+770+471+5514>
www.sevennet.net
2nd Floor, Faruk Investment Group, Salim Street, Sulaymaniyah, Iraq
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.isc.org/pipermail/bind-users/attachments/20260505/8be6bea2/attachment.htm>