RHSA-2026:22130

Vulnerability from csaf_redhat - Published: 2026-06-01 01:46 - Updated: 2026-07-13 23:21
Summary
Red Hat Security Advisory: rhc security update
Severity
Important
Notes
Topic: An update for rhc is now available for Red Hat Enterprise Linux 10. 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: rhc is a client tool and daemon that connects the system to Red Hat hosted services enabling system and subscription management. Security Fix(es): * crypto/x509: crypto/tls: golang: Go: Denial of Service vulnerability in certificate chain building (CVE-2026-32280) 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.
CVE-2026-32280

A flaw was found in the Go standard library packages `crypto/x509` and `crypto/tls`. During the process of building a certificate chain, an attacker can provide a large number of intermediate certificates. This excessive input is not properly limited, leading to an uncontrolled amount of work being performed. This can result in a denial of service (DoS) condition, making the affected system or application unavailable to legitimate users.

7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-770 - Allocation of Resources Without Limits or Throttling
Affected products
Product Identifier Version Remediation
Unresolved product id: AppStream-10.2.Z:rhc-1:0.3.8-5.el10_2.aarch64 —
Vendor Fix fix
Unresolved product id: AppStream-10.2.Z:rhc-1:0.3.8-5.el10_2.ppc64le —
Vendor Fix fix
Unresolved product id: AppStream-10.2.Z:rhc-1:0.3.8-5.el10_2.s390x —
Vendor Fix fix
Unresolved product id: AppStream-10.2.Z:rhc-1:0.3.8-5.el10_2.src —
Vendor Fix fix
Unresolved product id: AppStream-10.2.Z:rhc-1:0.3.8-5.el10_2.x86_64 —
Vendor Fix fix
Unresolved product id: AppStream-10.2.Z:rhc-debuginfo-1:0.3.8-5.el10_2.aarch64 —
Vendor Fix fix
Unresolved product id: AppStream-10.2.Z:rhc-debuginfo-1:0.3.8-5.el10_2.ppc64le —
Vendor Fix fix
Unresolved product id: AppStream-10.2.Z:rhc-debuginfo-1:0.3.8-5.el10_2.s390x —
Vendor Fix fix
Unresolved product id: AppStream-10.2.Z:rhc-debuginfo-1:0.3.8-5.el10_2.x86_64 —
Vendor Fix fix
Unresolved product id: AppStream-10.2.Z:rhc-debugsource-1:0.3.8-5.el10_2.aarch64 —
Vendor Fix fix
Unresolved product id: AppStream-10.2.Z:rhc-debugsource-1:0.3.8-5.el10_2.ppc64le —
Vendor Fix fix
Unresolved product id: AppStream-10.2.Z:rhc-debugsource-1:0.3.8-5.el10_2.s390x —
Vendor Fix fix
Unresolved product id: AppStream-10.2.Z:rhc-debugsource-1:0.3.8-5.el10_2.x86_64 —
Vendor Fix fix
Threats
Impact Important
References
To clipboard 

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          "category": "description",
          "text": "A flaw was found in the Go standard library packages `crypto/x509` and `crypto/tls`. During the process of building a certificate chain, an attacker can provide a large number of intermediate certificates. This excessive input is not properly limited, leading to an uncontrolled amount of work being performed. This can result in a denial of service (DoS) condition, making the affected system or application unavailable to legitimate users.",
          "title": "Vulnerability description"
        },
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          "text": "crypto/x509: crypto/tls: golang: Go: Denial of Service vulnerability in certificate chain building",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This is an Important denial of service vulnerability in the Go standard library\u0027s certificate chain building process. Systems utilizing Go applications that process untrusted TLS certificates or X.509 certificate chains are susceptible to resource exhaustion when presented with an excessive number of intermediate certificates, potentially leading to service unavailability. This flaw impacts applications directly using `crypto/x509` or `crypto/tls`.",
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        },
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          "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.",
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        }
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      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-32280"
        },
        {
          "category": "external",
          "summary": "RHBZ#2456339",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2456339"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-32280",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-32280"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-32280",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-32280"
        },
        {
          "category": "external",
          "summary": "https://go.dev/cl/758320",
          "url": "https://go.dev/cl/758320"
        },
        {
          "category": "external",
          "summary": "https://go.dev/issue/78282",
          "url": "https://go.dev/issue/78282"
        },
        {
          "category": "external",
          "summary": "https://groups.google.com/g/golang-announce/c/0uYbvbPZRWU",
          "url": "https://groups.google.com/g/golang-announce/c/0uYbvbPZRWU"
        },
        {
          "category": "external",
          "summary": "https://pkg.go.dev/vuln/GO-2026-4947",
          "url": "https://pkg.go.dev/vuln/GO-2026-4947"
        }
      ],
      "release_date": "2026-04-08T01:06:58.595000+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-06-01T01:46:42+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-2026:22130"
        }
      ],
      "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"
          },
          "products": [
            "AppStream-10.2.Z:rhc-1:0.3.8-5.el10_2.aarch64",
            "AppStream-10.2.Z:rhc-1:0.3.8-5.el10_2.ppc64le",
            "AppStream-10.2.Z:rhc-1:0.3.8-5.el10_2.s390x",
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            "AppStream-10.2.Z:rhc-1:0.3.8-5.el10_2.x86_64",
            "AppStream-10.2.Z:rhc-debuginfo-1:0.3.8-5.el10_2.aarch64",
            "AppStream-10.2.Z:rhc-debuginfo-1:0.3.8-5.el10_2.ppc64le",
            "AppStream-10.2.Z:rhc-debuginfo-1:0.3.8-5.el10_2.s390x",
            "AppStream-10.2.Z:rhc-debuginfo-1:0.3.8-5.el10_2.x86_64",
            "AppStream-10.2.Z:rhc-debugsource-1:0.3.8-5.el10_2.aarch64",
            "AppStream-10.2.Z:rhc-debugsource-1:0.3.8-5.el10_2.ppc64le",
            "AppStream-10.2.Z:rhc-debugsource-1:0.3.8-5.el10_2.s390x",
            "AppStream-10.2.Z:rhc-debugsource-1:0.3.8-5.el10_2.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "crypto/x509: crypto/tls: golang: Go: Denial of Service vulnerability in certificate chain building"
    }
  ]
}



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Tags
Taxonomy of the tags.





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.


Detection rules are retrieved from Rulezet.