Input validation error in Go programming language - CVE-2026-32281

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Main Vulnerability Database Vulnerabilities #VU140600

Input validation error in Go programming language - CVE-2026-32281

Published: July 31, 2026


Vulnerability identifier: #VU140600
CSH Severity: Medium
CVSS v4 BT: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]
CVE-ID: CVE-2026-32281
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to cause a denial of service.

The vulnerability exists due to improper input validation in Certificate.Verify in crypto/x509 when validating certificate chains containing a very large number of policy mappings. A remote attacker can present a specially crafted certificate chain to cause a denial of service.

This only affects validation of otherwise trusted certificate chains issued by a root CA in the VerifyOptions.Roots CertPool or in the system certificate pool.


Affected software

Go programming language
SUSE Linux Enterprise Server 15 SP4
SUSE Linux Enterprise Server 15 SP5
SUSE Linux Enterprise Server 15 SP6
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Real Time 15
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux Server - AUS
Red Hat Enterprise Linux for x86_64 - Extended Update Support
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Enterprise Linux for ARM 64 - Extended Update Support
Development Tools Module
Anolis OS
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
rhc (Red Hat package)
yggdrasil (Red Hat package)
golang-github-openprinting-ipp-usb (Red Hat package)
opentelemetry-collector (Red Hat package)
runc (Red Hat package)
skopeo (Red Hat package)
delve (Red Hat package)
golang-misc
golang-docs
golang-shared
golang-bin
golang-src
golang
golang-tests
golang (Red Hat package)
go1.25-openssl-doc
go1.25-openssl
go1.25-openssl-race
go1.25-openssl-debuginfo
go1.25-doc
go1.25-race
go1.25
go1.26-openssl
go1.26-openssl-race
go1.26-openssl-doc
go1.26-doc
go1.26
go1.26-race
buildah (Red Hat package)
podman (Red Hat package)
grafana-pcp (Red Hat package)
grafana (Red Hat package)
osbuild-composer (Red Hat package)
OpenShift Logging

How to mitigate CVE-2026-32281

Install security update from vendor's website.

Go programming language - addressed in versions 1.25.9, 1.26.2
rhc (Red Hat package) - addressed in versions 0.2.7-1.el9_6.4, 0.2.7-7.el9_8
yggdrasil (Red Hat package) - update to 0.4.9-5.el10_2
golang-github-openprinting-ipp-usb (Red Hat package) - update to 0.9.27-7.el10_2.1
opentelemetry-collector (Red Hat package) - addressed in versions 0.144.0-2.el9_4, 0.144.0-2.el9_6, 0.144.0-2.el10_0
runc (Red Hat package) - update to 1.4.2-2.el9_8
skopeo (Red Hat package) - addressed in versions 1.14.6-1.el9_4, 1.22.2-2.el10_2, 1.22.2-6.el9_8
delve (Red Hat package) - addressed in versions 1.25.2-4.el10_0, 1.26.1-2.el10_2
golang-misc - update to 1.25.9-1
golang-docs - update to 1.25.9-1
golang-shared - update to 1.25.9-1
golang-bin - update to 1.25.9-1
golang-src - update to 1.25.9-1
golang - update to 1.25.9-1
golang-tests - update to 1.25.9-1
golang (Red Hat package) - update to 1.25.9-1.el9_2
go1.25-openssl-doc - update to 1.25.9-150000.1.21.1
go1.25-openssl - update to 1.25.9-150000.1.21.1
go1.25-openssl-race - update to 1.25.9-150000.1.21.1
go1.25-openssl-debuginfo - update to 1.25.9-150000.1.21.1
go1.25-doc - update to 1.25.9-150000.1.35.1
go1.25-race - update to 1.25.9-150000.1.35.1
go1.25 - update to 1.25.9-150000.1.35.1
go1.26-openssl - update to 1.26.2-150000.1.6.1
go1.26-openssl-race - update to 1.26.2-150000.1.6.1
go1.26-openssl-doc - update to 1.26.2-150000.1.6.1
go1.26-doc - update to 1.26.2-150000.1.9.1
go1.26 - update to 1.26.2-150000.1.9.1
go1.26-race - update to 1.26.2-150000.1.9.1
buildah (Red Hat package) - addressed in versions 1.33.15-1.el9_4.1, 1.43.1-2.el10_2
podman (Red Hat package) - addressed in versions 4.9.4-20.el9_4.3, 5.8.2-3.el9_8, 5.8.2-3.el10_2
grafana-pcp (Red Hat package) - update to 5.1.1-5.el9_2.1
OpenShift Logging - update to 6.0.15
grafana (Red Hat package) - addressed in versions 9.0.9-12.el9_2, 9.2.10-27.el9_4
osbuild-composer (Red Hat package) - addressed in versions 132.2-8.el9_6, 134.1-8.el10_0

External References

Related Security Bulletins