RHSA-2026:2441
Vulnerability from csaf_redhat - Published: 2026-02-10 13:45 - Updated: 2026-03-23 08:33Summary
Red Hat Security Advisory: go-toolset:rhel8 security update
Severity
Important
Notes
Topic: An update for the go-toolset:rhel8 module is now available for Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions and Red Hat Enterprise Linux 8.8 Telecommunications Update Service.
Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.
Details: Go Toolset provides the Go programming language tools and libraries. Go is alternatively known as golang.
Security Fix(es):
* crypto/x509: golang: Denial of Service due to excessive resource consumption via crafted certificate (CVE-2025-61729)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
A flaw was found in golang. A remote attacker could exploit this vulnerability by providing a specially crafted certificate during the error string construction process within the `HostnameError.Error()` function. This flaw, caused by unbounded string concatenation, leads to excessive resource consumption. Successful exploitation can result in a denial of service (DoS) for the affected system.
7.5 (High)
Vendor Fix
For details on how to apply this update, which includes the changes described in this advisory, refer to:
https://access.redhat.com/articles/11258
https://access.redhat.com/errata/RHSA-2026:2441
References
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"text": "2418462"
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{
"category": "description",
"text": "A flaw was found in golang. A remote attacker could exploit this vulnerability by providing a specially crafted certificate during the error string construction process within the `HostnameError.Error()` function. This flaw, caused by unbounded string concatenation, leads to excessive resource consumption. Successful exploitation can result in a denial of service (DoS) for the affected system.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "crypto/x509: golang: Denial of Service due to excessive resource consumption via crafted certificate",
"title": "Vulnerability summary"
},
{
"category": "general",
"text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
"title": "CVSS score applicability"
}
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},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2025-61729"
},
{
"category": "external",
"summary": "RHBZ#2418462",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2418462"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2025-61729",
"url": "https://www.cve.org/CVERecord?id=CVE-2025-61729"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2025-61729",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-61729"
},
{
"category": "external",
"summary": "https://go.dev/cl/725920",
"url": "https://go.dev/cl/725920"
},
{
"category": "external",
"summary": "https://go.dev/issue/76445",
"url": "https://go.dev/issue/76445"
},
{
"category": "external",
"summary": "https://groups.google.com/g/golang-announce/c/8FJoBkPddm4",
"url": "https://groups.google.com/g/golang-announce/c/8FJoBkPddm4"
},
{
"category": "external",
"summary": "https://pkg.go.dev/vuln/GO-2025-4155",
"url": "https://pkg.go.dev/vuln/GO-2025-4155"
}
],
"release_date": "2025-12-02T18:54:10.166000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-02-10T13:45:07+00:00",
"details": "For details on how to apply this update, which includes the changes described in this advisory, refer to:\n\nhttps://access.redhat.com/articles/11258",
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"restart_required": {
"category": "none"
},
"url": "https://access.redhat.com/errata/RHSA-2026:2441"
}
],
"scores": [
{
"cvss_v3": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
},
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}
],
"threats": [
{
"category": "impact",
"details": "Important"
}
],
"title": "crypto/x509: golang: Denial of Service due to excessive resource consumption via crafted certificate"
}
]
}
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Sightings
| Author | Source | Type | Date |
|---|
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.
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