Debian alert DLA-4557-1 (pyasn1)

From:
             
 
Emmanuel Arias <eamanu@debian.org>
To:
             
 
debian-lts-announce@lists.debian.org
Subject:
             
 
[SECURITY] [DLA 4557-1] pyasn1 security update
Date:
             
 
Fri, 01 May 2026 11:57:37 -0300
Message-ID:
             
 
<afS_YThmy6cB1YHK@debian>
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Debian LTS Advisory DLA-4557-1                debian-lts@lists.debian.org
https://www.debian.org/lts/security/                       Emmanuel Arias
May 01, 2026                                  https://wiki.debian.org/LTS
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Package        : pyasn1
Version        : 0.4.8-1+deb11u2
CVE ID         : CVE-2026-30922
Debian Bug     : 1131371

It was discovered that pyasn1, a generic ASN.1 library for Python, is vulnerable
to a Denial of Service (DoS) attack caused by uncontrolled recursion when
decoding ASN.1 data with deeply nested structures. This vulnerability can force
the decoder to recursively call itself until the Python interpreter crashes with a
`RecursionError` or consumes all available memory, crashing the host application.

For Debian 11 bullseye, this problem has been fixed in version
0.4.8-1+deb11u2.

We recommend that you upgrade your pyasn1 packages.

For the detailed security status of pyasn1 please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/pyasn1

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS


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