USN-8129-1: pyasn1 vulnerability
A vulnerability in pyasn1 was discovered where it incorrectly handles recursion during ASN.1 data decoding. This flaw can be exploited by an attacker to cause excessive resource consumption, resulting in a denial of service condition. Multiple specific versions of pyasn1 used in various Ubuntu releases are affected.
AI Analysis
Technical Summary
The pyasn1 library contains a vulnerability due to improper handling of recursion when decoding ASN.1 data structures. This can lead to resource exhaustion, causing a denial of service. The issue affects several specific pyasn1 package versions distributed with Ubuntu 22.04 LTS, 24.04 LTS, and 25.10. No CVSS score or known exploits in the wild have been reported. The vulnerability is documented under USN-8129-1.
Potential Impact
An attacker can exploit this vulnerability to cause pyasn1 to consume excessive system resources, leading to denial of service. There is no indication of code execution or data disclosure. No known active exploitation has been reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no patch links or official fixes are provided in the advisory, users should monitor Ubuntu security updates for pyasn1 and apply updates once available.
USN-8129-1: pyasn1 vulnerability
Description
A vulnerability in pyasn1 was discovered where it incorrectly handles recursion during ASN.1 data decoding. This flaw can be exploited by an attacker to cause excessive resource consumption, resulting in a denial of service condition. Multiple specific versions of pyasn1 used in various Ubuntu releases are affected.
Affected software
pkg:deb/ubuntu/[email protected]?arch=source&distro=jammypkg:deb/ubuntu/[email protected]?arch=source&distro=noblepkg:deb/ubuntu/[email protected]?arch=source&distro=questingRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The pyasn1 library contains a vulnerability due to improper handling of recursion when decoding ASN.1 data structures. This can lead to resource exhaustion, causing a denial of service. The issue affects several specific pyasn1 package versions distributed with Ubuntu 22.04 LTS, 24.04 LTS, and 25.10. No CVSS score or known exploits in the wild have been reported. The vulnerability is documented under USN-8129-1.
Potential Impact
An attacker can exploit this vulnerability to cause pyasn1 to consume excessive system resources, leading to denial of service. There is no indication of code execution or data disclosure. No known active exploitation has been reported.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no patch links or official fixes are provided in the advisory, users should monitor Ubuntu security updates for pyasn1 and apply updates once available.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- USN-8129-1
- Osv Schema Version
- 1.7.0
- Aliases
- []
- Ecosystems
- ["Ubuntu:22.04:LTS","Ubuntu:24.04:LTS","Ubuntu:25.10"]
- Database Specific Severity
- null
- Cvss Version
- null
Threat ID: 6a58b51468715ace43db379f
Added to database: 07/16/2026, 10:40:20 UTC
Last enriched: 07/16/2026, 14:26:59 UTC
Last updated: 07/17/2026, 02:02:22 UTC
Views: 6
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