On Sun, Oct 11, 2026 at 08:23:15PM +0200, Salvatore Bonaccorso wrote:
> Hi,
> 
> On Sun, Oct 11, 2026 at 07:00:17PM +0200, Tobias Frost wrote:
> > Short Update:
> > 
> > the below poc stop crashing when applying the upstream fix for 
> > CVE-2026-85091 [1]. Additionally, there are many upstream marked as
> > "fixed with df84af2", e.g. some of the issues in the table of
> > [2], e.g upstram issues #1256, #1286, #1292, #1302, #1307 [3],
> > so this fix caused a lot of issues.
> > 
> > CVE-2026-85091 defined its scope to the non-blocking calls, however
> > whether the non-non-blocking issues will have a dedicated CVE will
> > depend on upstream view on this issue.
> 
> Correct, we asked both upstream but so far with no answer on it.
>
> > For LTS/ELTS I will at this time go with CVE-2026-85091 when preparing
> > the updates, but the first step will be to fix unstable.
 
Upstream confirmed that CVE-2026-85091 applied also to older releases,
back up to 1.2.3.5: 
https://github.com/madler/zlib/issues/1292#issuecomment-6456517984


> For unstable I already proposed a debdiff here in
> https://bugs.debian.org/1146895#27 but after talking to Mark (Cc'ed) I
> understand he prefers to upload a new upstream version instread. In
> any case my debdiff would be still ready and is tested on
> https://debusine.debian.net/debian/developers/work-request/1293184/ .
> 
> If Mark is OTOH fine with it I can upload my NMU fixing the issue.
> 
> Regards,
> Salvatore
> 

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