Hi,

The following vulnerability was published for libre.

CVE-2026-50161[0]:
| libre is a generic library for real-time communications with
| asynchronous input and output support. Prior to 4.8.1, the
| websock_decode() function in src/websock/websock.c contains an
| integer overflow when validating a masked WebSocket frame that uses
| the 64-bit extended length encoding. The expression 4 + hdr->len can
| wrap when hdr->len is close to UINT64_MAX, causing the
| mbuf_get_left() bounds check to pass. The subsequent XOR unmasking
| loop then writes beyond the heap buffer. Applications using
| websock_accept() or websock_accept_proto() to implement a WebSocket
| server are affected, and exploitation can cause attacker-controlled
| heap corruption or denial of service after the HTTP WebSocket
| upgrade handshake. This issue is fixed in version 4.8.1.


If you fix the vulnerability please also make sure to include the
CVE (Common Vulnerabilities & Exposures) id in your changelog entry.

For further information see:

[0] https://security-tracker.debian.org/tracker/CVE-2026-50161
https://www.cve.org/CVERecord?id=CVE-2026-50161
[1] https://github.com/baresip/re/security/advisories/GHSA-hvxv-v2gp-v93h
[2] https://github.com/baresip/re/pull/1584
[3] https://github.com/baresip/re/commit/718b92615c7963670d26c1a2b246968b58d782e8

Regards,
Salvatore

Dear maintainer,

I've prepared an NMU for libre (versioned as 2.0.1-3.1) and uploaded
it to DELAYED/2. Please feel free to tell me if I should cancel it.

cu
Adrian

We believe that the bug you reported is fixed in the latest version of
libre, which is due to be installed in the Debian FTP archive.

A summary of the changes between this version and the previous one is
attached.

Thank you for reporting the bug, which will now be closed.  If you
have further comments please address them to 1146714@bugs.debian.org,
and the maintainer will reopen the bug report if appropriate.

Debian distribution maintenance software
pp.
Bastian Germann <bage@debian.org> (supplier of updated libre package)

(This message was generated automatically at their request; if you
believe that there is a problem with it please contact the archive
administrators by mailing ftpmaster@ftp-master.debian.org)
Format: 1.8
Date: Mon, 19 Oct 2026 01:34:22 +0200
Source: libre
Architecture: source
Version: 2.0.1-4
Distribution: unstable
Urgency: medium
Maintainer: Debian VoIP Team <pkg-voip-maintainers@lists.alioth.debian.org>
Changed-By: Bastian Germann <bage@debian.org>
Closes: 1146714
Changes:
 libre (2.0.1-4) unstable; urgency=medium
 .
   * Team upload
 .
   [ Adrian Bunk ]
   * CVE-2026-50161: Integer overflow in websock_decode() (Closes: #1146714)
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