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Critical Security Vulnerability 2030-0450-4 in SUSE python-pyasn1

suse
Calendar Grey January 27, 2026
Dist Suse Esm H88
SUSE updates python-pyasn1 to address an important issue with denial of service. Ensure your systems are secure.
An update that solves one vulnerability can now be installed.

Summary

## This update for python-pyasn1 fixes the following issues: * CVE-2026-23490: Fixed malformed RELATIVE-OID with excessive continuation octets leading to Denial of Service (bsc#1256902) ## Patch Instructions: To install this SUSE update use the SUSE recommended installation methods like YaST online_update or "zypper patch". Alternatively you can run the command listed for your product: * SUSE Linux Enterprise Server 12 SP5 LTSS zypper in -t patch SUSE-SLE-SERVER-12-SP5-LTSS-2026-300=1 * SUSE Linux Enterprise Server 12 SP5 LTSS Extended Security zypper in -t patch SUSE-SLE-SERVER-12-SP5-LTSS-EXTENDED-SECURITY-2026-300=1 ## Package List: * SUSE Linux Enterprise Server 12 SP5 LTSS (noarch) * python-pyasn1-0.1.9-4.11.1 * python3-pyasn1-0.1.9-4.11.1

Topics%20covered

Topics Covered

security advisory denial of service update SuSE important python-pyasn1

References

* bsc#1256902

Cross-

* CVE-2026-23490

CVSS scores:

* CVE-2026-23490 ( SUSE ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

* CVE-2026-23490 ( NVD ): 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected Products:

* SUSE Linux Enterprise High Performance Computing 12 SP5

* SUSE Linux Enterprise Server 12 SP5

* SUSE Linux Enterprise Server 12 SP5 LTSS

* SUSE Linux Enterprise Server 12 SP5 LTSS Extended Security

* SUSE Linux Enterprise Server for SAP Applications 12 SP5

An update that solves one vulnerability can now be installed.

##

* https://www.suse.com/security/cve/CVE-2026-23490.html

* https://bugzilla.suse.com/show_bug.cgi?id=1256902

Severity
important
Lowest
Low
Medium
High
Critical

Announcement ID: SUSE-SU-2026:0300-1
Release Date: 2026-01-27T06:46:31Z
Rating: important

Topics%20covered

Topics Covered

security advisory denial of service update SuSE important python-pyasn1

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