Vulnerability-Lookup

RHSA-2026:5078

Vulnerability from csaf_redhat - Published: 2026-03-19 21:11 - Updated: 2026-03-22 16:13

Summary

Red Hat Security Advisory: rhc security update

Severity

Important

Notes

Topic: An update for rhc is now available for Red Hat Enterprise Linux 9.4 Extended Update Support. 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: golang: Denial of Service due to excessive resource consumption via crafted certificate (CVE-2025-61729) * golang: net/url: Memory exhaustion in query parameter parsing in net/url (CVE-2025-61726) 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-2025-61726

A flaw was found in the net/url package in the Go standard library. The package does not enforce a limit on the number of unique query parameters it parses. A Go application using the net/http.Request.ParseForm method will try to process all parameters provided in the request. A specially crafted HTTP request containing a massive number of query parameters will cause the application to consume an excessive amount of memory, eventually causing the application to crash or become unresponsive, resulting in a denial of service.

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

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-2026:5078

Workaround Red Hat has investigated whether a possible mitigation exists for this issue, and has not been able to identify a practical example. Please update the affected package as soon as possible.

CVE-2025-61729

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)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE-1050 - Excessive Platform Resource Consumption within a Loop

References

URL

Category

	https://access.redhat.com/errata/RHSA-2026:5078	self
	https://access.redhat.com/security/updates/classi…	external
	https://bugzilla.redhat.com/show_bug.cgi?id=2418462	external
	https://bugzilla.redhat.com/show_bug.cgi?id=2434432	external
	https://security.access.redhat.com/data/csaf/v2/a…	self
	https://access.redhat.com/security/cve/CVE-2025-61726	self
	https://bugzilla.redhat.com/show_bug.cgi?id=2434432	external
	https://www.cve.org/CVERecord?id=CVE-2025-61726	external
	https://nvd.nist.gov/vuln/detail/CVE-2025-61726	external
	https://go.dev/cl/736712	external
	https://go.dev/issue/77101	external
	https://groups.google.com/g/golang-announce/c/Vd2…	external
	https://pkg.go.dev/vuln/GO-2026-4341	external
	https://access.redhat.com/security/cve/CVE-2025-61729	self
	https://bugzilla.redhat.com/show_bug.cgi?id=2418462	external
	https://www.cve.org/CVERecord?id=CVE-2025-61729	external
	https://nvd.nist.gov/vuln/detail/CVE-2025-61729	external
	https://go.dev/cl/725920	external
	https://go.dev/issue/76445	external
	https://groups.google.com/g/golang-announce/c/8FJ…	external
	https://pkg.go.dev/vuln/GO-2025-4155	external

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        "name": "Allocation of Resources Without Limits or Throttling"
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          "category": "description",
          "text": "A flaw was found in the net/url package in the Go standard library. The package does not enforce a limit on the number of unique query parameters it parses. A Go application using the net/http.Request.ParseForm method will try to process all parameters provided in the request. A specially crafted HTTP request containing a massive number of query parameters will cause the application to consume an excessive amount of memory, eventually causing the application to crash or become unresponsive, resulting in a denial of service.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "golang: net/url: Memory exhaustion in query parameter parsing in net/url",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "To exploit this flaw, an attacker must be able to send a specially crafted HTTP request to an application parsing URL-encoded forms with net/url, specifically a request containing a large number of unique query parameters. The request will cause the application to consume an excessive amount of memory and eventually result in a denial of service, with no impact to confidentiality or integrity. Due to this reason, this vulnerability has been rated with an important severity.",
          "title": "Statement"
        },
        {
          "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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          "date": "2026-03-19T21:11:27+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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        "id": "CWE-1050",
        "name": "Excessive Platform Resource Consumption within a Loop"
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          "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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            "CRB-9.4.0.Z.EUS:rhc-devel-1:0.2.4-6.el9_4.x86_64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:5078"
        }
      ],
      "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-9.4.0.Z.EUS:rhc-1:0.2.4-6.el9_4.aarch64",
            "AppStream-9.4.0.Z.EUS:rhc-1:0.2.4-6.el9_4.ppc64le",
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            "CRB-9.4.0.Z.EUS:rhc-debugsource-1:0.2.4-6.el9_4.aarch64",
            "CRB-9.4.0.Z.EUS:rhc-debugsource-1:0.2.4-6.el9_4.ppc64le",
            "CRB-9.4.0.Z.EUS:rhc-debugsource-1:0.2.4-6.el9_4.s390x",
            "CRB-9.4.0.Z.EUS:rhc-debugsource-1:0.2.4-6.el9_4.x86_64",
            "CRB-9.4.0.Z.EUS:rhc-devel-1:0.2.4-6.el9_4.aarch64",
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            "CRB-9.4.0.Z.EUS:rhc-devel-1:0.2.4-6.el9_4.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "crypto/x509: golang: Denial of Service due to excessive resource consumption via crafted certificate"
    }
  ]
}

CVE-2025-61726 (GCVE-0-2025-61726)

Vulnerability from cvelistv5 – Published: 2026-01-28 19:30 – Updated: 2026-01-29 18:31

Title

Memory exhaustion in query parameter parsing in net/url

Summary

The net/url package does not set a limit on the number of query parameters in a query. While the maximum size of query parameters in URLs is generally limited by the maximum request header size, the net/http.Request.ParseForm method can parse large URL-encoded forms. Parsing a large form containing many unique query parameters can cause excessive memory consumption.

Severity ?

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE

CWE-400 - Uncontrolled Resource Consumption

Assigner

References

URL

	Vendor	Product	Version
	Go standard library	net/url	Affected: 0 , < 1.24.12 (semver) Affected: 1.25.0 , < 1.25.6 (semver)

CVE-2025-61729 (GCVE-0-2025-61729)

Vulnerability from cvelistv5 – Published: 2025-12-02 18:54 – Updated: 2025-12-03 19:37

Title

Excessive resource consumption when printing error string for host certificate validation in crypto/x509

Summary

Within HostnameError.Error(), when constructing an error string, there is no limit to the number of hosts that will be printed out. Furthermore, the error string is constructed by repeated string concatenation, leading to quadratic runtime. Therefore, a certificate provided by a malicious actor can result in excessive resource consumption.

Severity ?

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CWE

CWE-400 - Uncontrolled Resource Consumption

Assigner

References

URL

	Vendor	Product	Version
	Go standard library	crypto/x509	Affected: 0 , < 1.24.11 (semver) Affected: 1.25.0 , < 1.25.5 (semver)

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.

Detection rules are retrieved from Rulezet.

Action not permitted

RHSA-2026:5078

CVE-2025-61726 (GCVE-0-2025-61726)

CVE-2025-61729 (GCVE-0-2025-61729)

Tags

Sightings

Nomenclature