Ubuntu alert USN-8129-1 (pyasn1)

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noreply+usn-bot@canonical.com
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ubuntu-security-announce@lists.ubuntu.com
Subject:
             
 
[USN-8129-1] pyasn1 vulnerability
Date:
             
 
Mon, 30 Mar 2026 14:09:48 +0000
Message-ID:
             
 
<E1w7DJM-0005Bv-Cu@lists.ubuntu.com>
==========================================================================
Ubuntu Security Notice USN-8129-1
March 30, 2026

pyasn1 vulnerability
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 25.10
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS

Summary:

pyasn1 could be made to consume resources and crash if it received
specially crafted input.

Software Description:
- pyasn1: ASN.1 library for Python

Details:

It was discovered that pyasn1 incorrectly handled recursion when decoding
ASN.1 data. An attacker could use this issue to cause pyasn1 to consume
resources, leading to a denial of service.

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 25.10
  python3-pyasn1                  0.6.1-1ubuntu0.2

Ubuntu 24.04 LTS
  python3-pyasn1                  0.4.8-4ubuntu0.2

Ubuntu 22.04 LTS
  python3-pyasn1                  0.4.8-1ubuntu0.2

In general, a standard system update will make all the necessary changes.

References:
  https://ubuntu.com/security/notices/USN-8129-1
  CVE-2026-30922

Package Information:
  https://launchpad.net/ubuntu/+source/pyasn1/0.6.1-1ubuntu0.2
  https://launchpad.net/ubuntu/+source/pyasn1/0.4.8-4ubuntu0.2
  https://launchpad.net/ubuntu/+source/pyasn1/0.4.8-1ubuntu0.2


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