SUSE-SU-2026:0430-1
Vulnerability from csaf_suse - Published: 2026-02-11 08:43 - Updated: 2026-02-11 08:43Summary
Security update for python-pyasn1
Severity
Important
Notes
Title of the patch: Security update for python-pyasn1
Description of the patch: 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)
Patchnames: SUSE-2026-430,SUSE-SLE-Micro-5.3-2026-430,SUSE-SLE-Micro-5.4-2026-430,SUSE-SLE-Micro-5.5-2026-430,SUSE-SLE-Module-Basesystem-15-SP7-2026-430,SUSE-SLE-Product-HPC-15-SP4-ESPOS-2026-430,SUSE-SLE-Product-HPC-15-SP4-LTSS-2026-430,SUSE-SLE-Product-HPC-15-SP5-ESPOS-2026-430,SUSE-SLE-Product-HPC-15-SP5-LTSS-2026-430,SUSE-SLE-Product-SLES-15-SP4-LTSS-2026-430,SUSE-SLE-Product-SLES-15-SP5-LTSS-2026-430,SUSE-SLE-Product-SLES-15-SP6-LTSS-2026-430,SUSE-SLE-Product-SLES_SAP-15-SP4-2026-430,SUSE-SLE-Product-SLES_SAP-15-SP5-2026-430,SUSE-SLE-Product-SLES_SAP-15-SP6-2026-430,SUSE-SUSE-MicroOS-5.2-2026-430
Terms of use: CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).
7.5 (High)
Affected products
Recommended
15 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS:python3-pyasn1-0.4.2-150000.3.13.1.noarch | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS:python3-pyasn1-0.4.2-150000.3.13.1.noarch | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS:python3-pyasn1-0.4.2-150000.3.13.1.noarch | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Enterprise High Performance Computing 15 SP5-LTSS:python3-pyasn1-0.4.2-150000.3.13.1.noarch | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Enterprise Micro 5.2:python3-pyasn1-0.4.2-150000.3.13.1.noarch | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Enterprise Micro 5.3:python3-pyasn1-0.4.2-150000.3.13.1.noarch | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Enterprise Micro 5.4:python3-pyasn1-0.4.2-150000.3.13.1.noarch | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Enterprise Micro 5.5:python3-pyasn1-0.4.2-150000.3.13.1.noarch | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Enterprise Module for Basesystem 15 SP7:python3-pyasn1-0.4.2-150000.3.13.1.noarch | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Enterprise Server 15 SP4-LTSS:python3-pyasn1-0.4.2-150000.3.13.1.noarch | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Enterprise Server 15 SP5-LTSS:python3-pyasn1-0.4.2-150000.3.13.1.noarch | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Enterprise Server 15 SP6-LTSS:python3-pyasn1-0.4.2-150000.3.13.1.noarch | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Enterprise Server for SAP Applications 15 SP4:python3-pyasn1-0.4.2-150000.3.13.1.noarch | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Enterprise Server for SAP Applications 15 SP5:python3-pyasn1-0.4.2-150000.3.13.1.noarch | — |
Vendor Fix
|
|
| Unresolved product id: SUSE Linux Enterprise Server for SAP Applications 15 SP6:python3-pyasn1-0.4.2-150000.3.13.1.noarch | — |
Vendor Fix
|
Threats
Impact
important
References
8 references
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"vulnerabilities": [
{
"cve": "CVE-2026-23490",
"ids": [
{
"system_name": "SUSE CVE Page",
"text": "https://www.suse.com/security/cve/CVE-2026-23490"
}
],
"notes": [
{
"category": "general",
"text": "pyasn1 is a generic ASN.1 library for Python. Prior to 0.6.2, a Denial-of-Service issue has been found that leads to memory exhaustion from malformed RELATIVE-OID with excessive continuation octets. This vulnerability is fixed in 0.6.2.",
"title": "CVE description"
}
],
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]
},
"references": [
{
"category": "external",
"summary": "CVE-2026-23490",
"url": "https://www.suse.com/security/cve/CVE-2026-23490"
},
{
"category": "external",
"summary": "SUSE Bug 1256902 for CVE-2026-23490",
"url": "https://bugzilla.suse.com/1256902"
}
],
"remediations": [
{
"category": "vendor_fix",
"details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
"product_ids": [
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]
}
],
"scores": [
{
"cvss_v3": {
"baseScore": 7.5,
"baseSeverity": "HIGH",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
"products": [
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]
}
],
"threats": [
{
"category": "impact",
"date": "2026-02-11T08:43:49Z",
"details": "important"
}
],
"title": "CVE-2026-23490"
}
]
}
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Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.