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Fencer Vulns
critical 9.1

CVE-2025-68121 json

Unexpected session resumption in crypto/tls

published 2026-02-05 9 mo ago modified 2026-09-29 41 d ago also BIT-golang-2025-68121 , EUVD-2025-206854 , GO-2026-4337

cvss
9.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.9%
EPSS 0.9% chance of exploitation in 30 days, percentile 59%
public exploits
0
none known

Summary

During session resumption in crypto/tls, if the underlying Config has its ClientCAs or RootCAs fields mutated between the initial handshake and the resumed handshake, the resumed handshake may succeed when it should have failed. This may happen when a user calls Config.Clone and mutates the returned Config, or uses Config.GetConfigForClient. This can cause a client to resume a session with a server that it would not have resumed with during the initial handshake, or cause a server to resume a session with a client that it would not have resumed with during the initial handshake.

Patch / fix

  • bitnami golang 1.24.13, 1.25.7
  • go stdlib 1.24.13, 1.25.7, 1.26.0-rc.3
  • Go standard library crypto/tls 1.24.13, 1.25.7, 1.26.0-rc.3
  • cri-o openshift 4.13 1.26.5-32.rhaos4.13.git1088e36.el8
  • cri-o openshift 4.13 1.26.5-32.rhaos4.13.git1088e36.el9
  • skopeo openshift 4.13 2:1.11.3-7.rhaos4.13.el8
  • skopeo openshift 4.13 2:1.11.3-7.rhaos4.13.el9
  • cri-tools openshift 4.13 1.26.0-9.el8
  • cri-tools openshift 4.13 1.26.0-9.el9
  • openshift openshift 4.13 4.13.0-202608122150.p2.gbbc7c0c.assembly.stream.el8
  • openshift openshift 4.13 4.13.0-202608122150.p2.gbbc7c0c.assembly.stream.el9

red hat advisories RHSA-2026:72805RHSA-2026:72737RHSA-2026:72276RHSA-2026:69235RHSA-2026:65838RHSA-2026:68504

  • go1.25-openssl SLES for SAP applications 16.0, SLES 16.0 1.25.12-160000.1.1
  • go1.25-openssl SLES for SAP 15 SP6, SLES 15 SP6-LTSS, SLE Module for Development Tools 15 SP7 +1 more 1.25.8-150600.13.15.1
  • go1.25-openssl SLES for SAP 15 SP5, SLES for SAP 15 SP4, SLES 15 SP5-LTSS +5 more 1.25.8-150000.1.18.1
  • go1.24-openssl SLES for SAP applications 16.0, SLES 16.0 1.24.13-160000.1.1
  • go1.25-openssl SLES for SAP 15 SP5, SLES for SAP 15 SP4, SLES 15 SP5-LTSS +5 more 1.25.7-150000.1.15.1
  • go1.24-openssl SLES for SAP 15 SP6, SLES 15 SP6-LTSS, SLE Module for Development Tools 15 SP7 +1 more 1.24.13-150600.13.18.1
  • go1.25-openssl SLES for SAP 15 SP6, SLES 15 SP6-LTSS, SLE Module for Development Tools 15 SP7 +1 more 1.25.7-150600.13.12.1
  • go1.25-openssl SLES for SAP applications 16.0, SLES 16.0 1.25.7-160000.1.1

suse advisories SUSE-SU-2026:22638-1SUSE-SU-2026:0977-1SUSE-SU-2026:0947-1SUSE-SU-2026:20629-1SUSE-SU-2026:0790-1SUSE-SU-2026:0789-1

  • golang-github-lusitaniae-apache_exporter openSUSE Tumbleweed 1.1.1-1.1
  • govulncheck-vulndb openSUSE Leap 16.0 0.0.20260723T184607-160000.1.1
  • rclone openSUSE Leap 16.0 1.74.4-bp160.1.1
  • go1.25-openssl openSUSE Leap 16.0 1.25.12-160000.1.1
  • coredns openSUSE Leap 16.0 1.14.2-bp160.1.1
  • openbao openSUSE Tumbleweed 2.5.1-1.1
  • kubelogin openSUSE Tumbleweed 0.2.16-1.1
  • go1.24-openssl openSUSE Leap 16.0 1.24.13-160000.1.1

opensuse advisories openSUSE-SU-2026:12057-1openSUSE-SU-2026:21483-1openSUSE-SU-2026:21436-1openSUSE-SU-2026:21319-1openSUSE-SU-2026:20619-1openSUSE-SU-2026:10396-1

  • go-fdo-client AlmaLinux 10 1.0.0-4.el10_2
  • go-fdo-server AlmaLinux 10 1.0.1-2.el10_2
  • go-fdo-server-owner AlmaLinux 10 1.0.1-2.el10_2
  • go-fdo-server-rendezvous AlmaLinux 10 1.0.1-2.el10_2
  • go-fdo-server-manufacturer AlmaLinux 10 1.0.1-2.el10_2
  • containernetworking-plugins AlmaLinux 9 1:1.9.0-2.el9
  • delve AlmaLinux 10 1.26.1-1.el10_2
  • yggdrasil AlmaLinux 10 0.4.8-3.el10_1

almalinux advisories ALSA-2026:22141ALSA-2026:18913ALSA-2026:19013ALSA-2026:5146ALSA-2026:4672ALSA-2026:4164

  • osbuild-composer Rocky Linux 9 165.1-2.el9_8.rocky.0.1
  • go-fdo-client Rocky Linux 10 1.0.0-4.el10_2
  • go-fdo-server Rocky Linux 10 1.0.1-2.el10_2
  • osbuild-composer Rocky Linux 10 165.1-2.el10_2.rocky.0.1
  • image-builder Rocky Linux 10 52.1-1.el10_2.rocky.0.1
  • image-builder Rocky Linux 9 52.1-1.el9_8
  • delve Rocky Linux 10 1.26.1-1.el10_2
  • containernetworking-plugins Rocky Linux 9 1:1.9.0-2.el9

rocky linux advisories RLSA-2026:22714RLSA-2026:22141RLSA-2026:22450RLSA-2026:22937RLSA-2026:23228RLSA-2026:19013

  • go Alpine 3.22 1.24.12-r0
  • go Alpine 3.22 1.24.13-r0
  • go Alpine 3.24, Alpine 3.23 1.25.6-r0
  • go Alpine 3.24, Alpine 3.23 1.25.7-r0
  • rclone Alpine 3.24 1.73.5-r0

alpine advisories ALPINE-CVE-2025-68121

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • golang Azure Linux 3.0 1.24.12-1
  • golang Azure Linux 3.0 1.25.6-1
  • msft-golang CBL-Mariner 2.0 1.24.12-1

azure linux advisories AZL-76653AZL-76662AZL-76665

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-68121 updated cvss 7.4

crypto/tls: crypto/tls: Incorrect certificate validation during TLS session resumption

  • Red Hat Assisted Installer for Red Hat OpenShift Container Platform 2 rhai/assisted-installer-rhel9
    affected: workaround, no fix available
  • Red Hat Confidential Compute Attestation build-of-trustee/trustee-rhel9-operator, openshift-sandboxed-containers/osc-monitor-rhel9
    affected: workaround, no fix available, no fix planned “Will not fix”
  • Red Hat Deployment Validation Operator dvo/deployment-validation-rhel8-operator Red Hat ExternalDNS Operator edo/external-dns-rhel8 Red Hat Fence Agents Remediation Operator workload-availability/fence-agents-remediation-rhel8-operator Red Hat File Integrity Operator compliance/openshift-compliance-operator-bundle
    affected: workaround, no fix available
  • Red Hat Logging Subsystem for Red Hat OpenShift openshift-logging/eventrouter-rhel9, openshift-logging/logging-loki-rhel9
    affected: workaround, no fix planned “Will not fix”
  • Red Hat Machine Deletion Remediation Operator workload-availability/machine-deletion-remediation-rhel8-operator
    affected: workaround, no fix available
  • Red Hat mirror registry for Red Hat OpenShift openshift/mirror-registry-rhel8
    affected: workaround, no fix planned “Will not fix”
  • Red Hat Multiarch Tuning Operator multiarch-tuning/multiarch-tuning-rhel9-operator Red Hat Node Maintenance Operator workload-availability/node-maintenance-rhel8-operator, container-native-virtualization/node-maintenance-operator Red Hat OpenShift Developer Tools and Services helm Red Hat OpenShift Lightspeed openshift-lightspeed/lightspeed-rhel9-operator Red Hat OpenShift Pipelines openshift-pipelines-client Red Hat OpenShift Serverless kn-workflow-plugin, openshift-serverless-clients, openshift-serverless-1/kn-plugin-event-sender-rhel9
    +2 more products
    Red Hat OpenShift Service Mesh 2 openshift4/ose-docker-builder-rhel9 Red Hat OpenShift Service Mesh 3 openshift4/ose-docker-builder-rhel9
    affected: workaround, no fix available
  • Red Hat 3scale API Management Platform 2 3scale-amp26/operator, rhcl-1/authorino-rhel9, 3scale-amp26/3scale-operator, 3scale-amp2/3scale-rhel7-operator, 3scale-amp2/3scale-rhel9-operator, 3scale-tech-preview/authorino-rhel9
    affected: workaround, no fix available, no fix planned “Will not fix”
show 7 more
  • Red Hat AMQ Broker 7 amq7/amq-broker-rhel9-operator Red Hat Ansible Automation Platform 2 receptor Red Hat build of Apache Camel - HawtIO 4 hawtio-operator-container
    affected: workaround, no fix available
  • Red Hat build of Apicurio Registry 2 apicurio/apicurio-registry-rhel8-operator, apicurio/apicurio-registry-rhel9-operator
    affected: workaround, no fix planned “Will not fix”
  • Red Hat Ceph Storage 5 rhel8/grafana, rhel9/grafana, rhceph/grafana-rhel9 Red Hat Ceph Storage 6 ceph, cephadm, librbd1, librgw2, rbd-nbd, ceph-mib, +19 more Red Hat Ceph Storage 7 ceph, cephadm, librbd1, librgw2, rbd-nbd, ceph-mib, +17 more Red Hat Ceph Storage 8 ceph, cephadm, librbd1, librgw2, rbd-nbd, ceph-mib, +18 more Red Hat Certification Program for Red Hat Enterprise Linux 9 redhat-certification-preflight Red Hat Connectivity Link 1 rhcl-1/coredns-rhel9
    +2 more products
    Red Hat Edge Manager 1 flightctl Red Hat Enterprise Linux 7 rhc, rhc-worker-script
    affected: workaround, no fix available
  • Red Hat Enterprise Linux 8 weldr-client
    affected: workaround, no fix planned “Will not fix”
  • Red Hat Enterprise Linux 9 go-toolset, rhel9/bootc-image-builder Red Hat Enterprise Linux 10 rhel10/bootc-image-builder Red Hat JBoss Web Server 6 jboss-webserver/jws-rhel9-operator Red Hat OpenShift AI (RHOAI) rhoai/odh-rhel8-operator Red Hat OpenShift Cluster Manager CLI ocm-cli-clients/ocm-cli-rhel9
    affected: workaround, no fix available
  • Red Hat OpenShift Container Platform 4 cri-o, cri-tools, microshift, microshift-olm, kata-containers, openshift-kuryr, +25 more
    affected: workaround, no fix available, no fix planned “Will not fix”
  • Red Hat OpenShift Container Platform 5 rh-osbs/openshift-golang-builder, openshift5/ose-ansible-rhel9-operator Red Hat OpenShift distributed tracing 3 rhosdt/tempo-rhel8 Red Hat OpenShift on AWS rosa
    affected: workaround, no fix available

6 more affected, 12 more under investigation, 108 more fixed, 96 more not affected in the full advisory

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
yes
Technical impact
total
Assessed
6 mo ago

Exploit prediction

0.90% chance of exploitation in the next 30 days, higher than 59% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • go.dev https://go.dev/issue/77217 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CISA ADP 3.1 9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
NVD 3.1 10.0 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
CNA 3.1 9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
OSV 3.1 9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Affected packages

ecosystem package affected fixed in
bitnami golang
<1.24.13
>=1.25.0-0, <1.25.7
1.24.13
1.25.7
go stdlib
<1.24.13
>=1.25.0-0, <1.25.7
>=1.26.0-rc.1, <1.26.0-rc.3
1.24.13
1.25.7
1.26.0-rc.3

Affected products

  • Go standard library crypto/tls

Classification

Weakness
  • CWE-295 Improper Certificate Validation

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.