RHSA-2026:22141
Vulnerability from csaf_redhat - Published: 2026-06-01 02:15 - Updated: 2026-06-01 12:13Summary
Red Hat Security Advisory: go-fdo-client and go-fdo-server security update
Severity
Moderate
Notes
Topic: An update for multiple packages is now available for Red Hat Enterprise Linux 10.
Red Hat Product Security has rated this update as having a security impact of Moderate. 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: This package provides a server-side implementation of the FIDO Device Onboard (FDO) specification, written in Go. FDO is an open standard for the late binding of device credentials, allowing for automated and secure on-boarding of devices when they are first powered on in their final location.
Security Fix(es):
* crypto/tls: Unexpected session resumption in crypto/tls (CVE-2025-68121)
* crypto/x509: golang: Go crypto/x509: Denial of Service via inefficient certificate chain validation (CVE-2026-32281)
* golang: internal/syscall/unix: Root.Chmod can follow symlinks out of the root (CVE-2026-32282)
* 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.
A flaw was found in the crypto/tls component. This vulnerability occurs during Transport Layer Security (TLS) session resumption when certificate authority (CA) settings are modified between the initial and resumed handshakes. An attacker could exploit this to bypass certificate validation, allowing a client or server to establish a connection that should have been rejected. This could lead to an authentication bypass under specific conditions.
7.4 (High)
Affected products
Fixed
17 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: AppStream-10.2.Z:go-fdo-client-0:1.0.0-4.el10_2.aarch64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:go-fdo-client-0:1.0.0-4.el10_2.src | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:go-fdo-client-0:1.0.0-4.el10_2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:go-fdo-client-debuginfo-0:1.0.0-4.el10_2.aarch64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:go-fdo-client-debuginfo-0:1.0.0-4.el10_2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:go-fdo-client-debugsource-0:1.0.0-4.el10_2.aarch64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:go-fdo-client-debugsource-0:1.0.0-4.el10_2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:go-fdo-server-0:1.0.1-2.el10_2.aarch64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:go-fdo-server-0:1.0.1-2.el10_2.src | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:go-fdo-server-0:1.0.1-2.el10_2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:go-fdo-server-debuginfo-0:1.0.1-2.el10_2.aarch64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:go-fdo-server-debuginfo-0:1.0.1-2.el10_2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:go-fdo-server-debugsource-0:1.0.1-2.el10_2.aarch64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:go-fdo-server-debugsource-0:1.0.1-2.el10_2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:go-fdo-server-manufacturer-0:1.0.1-2.el10_2.noarch | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:go-fdo-server-owner-0:1.0.1-2.el10_2.noarch | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:go-fdo-server-rendezvous-0:1.0.1-2.el10_2.noarch | — |
Vendor Fix
fix
|
Threats
Impact
Moderate
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)
Affected products
Fixed
17 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: AppStream-10.2.Z:go-fdo-client-0:1.0.0-4.el10_2.aarch64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:go-fdo-client-0:1.0.0-4.el10_2.src | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:go-fdo-client-0:1.0.0-4.el10_2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:go-fdo-client-debuginfo-0:1.0.0-4.el10_2.aarch64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:go-fdo-client-debuginfo-0:1.0.0-4.el10_2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:go-fdo-client-debugsource-0:1.0.0-4.el10_2.aarch64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:go-fdo-client-debugsource-0:1.0.0-4.el10_2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:go-fdo-server-0:1.0.1-2.el10_2.aarch64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:go-fdo-server-0:1.0.1-2.el10_2.src | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:go-fdo-server-0:1.0.1-2.el10_2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:go-fdo-server-debuginfo-0:1.0.1-2.el10_2.aarch64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:go-fdo-server-debuginfo-0:1.0.1-2.el10_2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:go-fdo-server-debugsource-0:1.0.1-2.el10_2.aarch64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:go-fdo-server-debugsource-0:1.0.1-2.el10_2.x86_64 | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:go-fdo-server-manufacturer-0:1.0.1-2.el10_2.noarch | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:go-fdo-server-owner-0:1.0.1-2.el10_2.noarch | — |
Vendor Fix
fix
|
|
| Unresolved product id: AppStream-10.2.Z:go-fdo-server-rendezvous-0:1.0.1-2.el10_2.noarch | — |
Vendor Fix
fix
|
Threats
Impact
Important
A flaw was found in Go's `crypto/x509` package. A remote attacker could exploit this by presenting a specially crafted certificate chain containing a large number of policy mappings. This inefficient validation process consumes excessive resources, which can lead to a denial of service (DoS) for applications or systems performing certificate validation.
5.9 (Medium)
Affected products
Fixed
17 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: AppStream-10.2.Z:go-fdo-client-0:1.0.0-4.el10_2.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:go-fdo-client-0:1.0.0-4.el10_2.src | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:go-fdo-client-0:1.0.0-4.el10_2.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:go-fdo-client-debuginfo-0:1.0.0-4.el10_2.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:go-fdo-client-debuginfo-0:1.0.0-4.el10_2.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:go-fdo-client-debugsource-0:1.0.0-4.el10_2.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:go-fdo-client-debugsource-0:1.0.0-4.el10_2.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:go-fdo-server-0:1.0.1-2.el10_2.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:go-fdo-server-0:1.0.1-2.el10_2.src | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:go-fdo-server-0:1.0.1-2.el10_2.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:go-fdo-server-debuginfo-0:1.0.1-2.el10_2.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:go-fdo-server-debuginfo-0:1.0.1-2.el10_2.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:go-fdo-server-debugsource-0:1.0.1-2.el10_2.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:go-fdo-server-debugsource-0:1.0.1-2.el10_2.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:go-fdo-server-manufacturer-0:1.0.1-2.el10_2.noarch | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:go-fdo-server-owner-0:1.0.1-2.el10_2.noarch | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:go-fdo-server-rendezvous-0:1.0.1-2.el10_2.noarch | — |
Vendor Fix
fix
Workaround
|
Threats
Impact
Moderate
A flaw was found in the internal/syscall/unix package in the Go standard library. If the target of the `Root.Chmod` function is replaced with a symbolic link during execution, specifically after `Root.Chmod` checks the target but before acting, the `chmod` operation will be performed on the file the symbolic link points to. This issue can bypass directory restrictions and lead to unauthorized permission changes on the filesystem.
7.8 (High)
Affected products
Fixed
17 products
| Product | Identifier | Version | Remediation |
|---|---|---|---|
| Unresolved product id: AppStream-10.2.Z:go-fdo-client-0:1.0.0-4.el10_2.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:go-fdo-client-0:1.0.0-4.el10_2.src | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:go-fdo-client-0:1.0.0-4.el10_2.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:go-fdo-client-debuginfo-0:1.0.0-4.el10_2.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:go-fdo-client-debuginfo-0:1.0.0-4.el10_2.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:go-fdo-client-debugsource-0:1.0.0-4.el10_2.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:go-fdo-client-debugsource-0:1.0.0-4.el10_2.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:go-fdo-server-0:1.0.1-2.el10_2.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:go-fdo-server-0:1.0.1-2.el10_2.src | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:go-fdo-server-0:1.0.1-2.el10_2.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:go-fdo-server-debuginfo-0:1.0.1-2.el10_2.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:go-fdo-server-debuginfo-0:1.0.1-2.el10_2.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:go-fdo-server-debugsource-0:1.0.1-2.el10_2.aarch64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:go-fdo-server-debugsource-0:1.0.1-2.el10_2.x86_64 | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:go-fdo-server-manufacturer-0:1.0.1-2.el10_2.noarch | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:go-fdo-server-owner-0:1.0.1-2.el10_2.noarch | — |
Vendor Fix
fix
Workaround
|
|
| Unresolved product id: AppStream-10.2.Z:go-fdo-server-rendezvous-0:1.0.1-2.el10_2.noarch | — |
Vendor Fix
fix
Workaround
|
Threats
Impact
Moderate
References
37 references
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"title": "Statement"
},
{
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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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"id": "CWE-770",
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{
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},
{
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"title": "Vulnerability description"
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"title": "Vulnerability summary"
},
{
"category": "other",
"text": "This flaw occurs during the validation of otherwise trusted certificate chains that contain a large number of policy mappings, leading to excessive resource consumption. Exploitation requires an attacker to present a specially crafted, yet trusted, certificate chain which would require the attacker has already compromised a trusted certificate root. Red Hat continuously monitors certificate authorities and curates the set which is trusted by default for Red Hat products.",
"title": "Statement"
},
{
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}
],
"title": "crypto/x509: golang: Go crypto/x509: Denial of Service via inefficient certificate chain validation"
},
{
"cve": "CVE-2026-32282",
"cwe": {
"id": "CWE-367",
"name": "Time-of-check Time-of-use (TOCTOU) Race Condition"
},
"discovery_date": "2026-04-08T02:01:12.683211+00:00",
"ids": [
{
"system_name": "Red Hat Bugzilla ID",
"text": "2456336"
}
],
"notes": [
{
"category": "description",
"text": "A flaw was found in the internal/syscall/unix package in the Go standard library. If the target of the `Root.Chmod` function is replaced with a symbolic link during execution, specifically after `Root.Chmod` checks the target but before acting, the `chmod` operation will be performed on the file the symbolic link points to. This issue can bypass directory restrictions and lead to unauthorized permission changes on the filesystem.",
"title": "Vulnerability description"
},
{
"category": "summary",
"text": "golang: internal/syscall/unix: Root.Chmod can follow symlinks out of the root",
"title": "Vulnerability summary"
},
{
"category": "other",
"text": "To exploit this issue, an attacker needs access to the system and the required permissions to create a symbolic link. Additionally, the attacker must swap the target file with a symbolic link in the exact window after the `Root.Chmod` function checks its target but before acting. Due to these conditions, this flaw has been rated with a moderate 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"
}
],
"product_status": {
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},
"references": [
{
"category": "self",
"summary": "Canonical URL",
"url": "https://access.redhat.com/security/cve/CVE-2026-32282"
},
{
"category": "external",
"summary": "RHBZ#2456336",
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2456336"
},
{
"category": "external",
"summary": "https://www.cve.org/CVERecord?id=CVE-2026-32282",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-32282"
},
{
"category": "external",
"summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-32282",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-32282"
},
{
"category": "external",
"summary": "https://go.dev/cl/763761",
"url": "https://go.dev/cl/763761"
},
{
"category": "external",
"summary": "https://go.dev/issue/78293",
"url": "https://go.dev/issue/78293"
},
{
"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-2026-4864",
"url": "https://pkg.go.dev/vuln/GO-2026-4864"
}
],
"release_date": "2026-04-08T01:06:55.953000+00:00",
"remediations": [
{
"category": "vendor_fix",
"date": "2026-06-01T02:15:37+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-2026:22141"
},
{
"category": "workaround",
"details": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.",
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"scores": [
{
"cvss_v3": {
"attackComplexity": "HIGH",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H",
"version": "3.1"
},
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]
}
],
"threats": [
{
"category": "impact",
"details": "Moderate"
}
],
"title": "golang: internal/syscall/unix: Root.Chmod can follow symlinks out of the root"
}
]
}
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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.
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