CVE-2026-114406: Ca-certificates: distrust emudhra intermediate ca certificates due to security concerns

Severity: medium (CVSS 6.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-21 · updated 2026-10-26
Weakness: CWE-295

Description

The system certificate authority (CA) store in Red Hat products, distributed via ca-certificates RPM packages, included multiple root CA certificates of authorities, which signed intermediate CA certificates with weak private keys issued by the eMudhra certificate authority. A man-in-the-middle attacker could use this flaw to issue certificates for arbitrary host names signed by the weak intermediate CA certificates, which would be considered trusted by a TLS/SSL client using system CA store and cause such clients to connect to malicious sites. Due to inability to only distrust specific intermediate certificates in all clients using the system CA store, root CA certificates of authorities that signed weak intermediate CA certificates are being removed.

Affected products

Red Hat OpenShift Container Platform 4.18: all versions
Red Hat Advanced Cluster Security 4: all versions
Red Hat Enterprise Linux 10: all versions — fixed in 0:2026.2.92_v9.0.319-100.3.el10_2
Red Hat Enterprise Linux 10.0 Extended Update Support: all versions — fixed in 0:2026.2.92_v9.0.319-100.3.el10_0
Red Hat Enterprise Linux 6: all versions
Red Hat Enterprise Linux 7 Extended Lifecycle Support: all versions — fixed in 0:2026.2.92_v9.0.319-70.3.el7_9
Red Hat Enterprise Linux 8: all versions — fixed in 0:2026.2.92_v9.0.319-81.3.el8_10
Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support: all versions — fixed in 0:2026.2.92_v9.0.319-80.3.el8_4
Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support: all versions — fixed in 0:2026.2.92_v9.0.319-80.3.el8_6
Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On: all versions — fixed in 0:2026.2.92_v9.0.319-80.3.el8_6
Red Hat Enterprise Linux 8.8 Telecommunications Update Service: all versions — fixed in 0:2026.2.92_v9.0.319-80.3.el8_8
Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions: all versions — fixed in 0:2026.2.92_v9.0.319-80.3.el8_8
Red Hat Enterprise Linux 9: all versions — fixed in 0:2026.2.92_v9.0.319-90.3.el9_8
Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions: all versions — fixed in 0:2026.2.92_v9.0.319-90.3.el9_2
Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions: all versions — fixed in 0:2026.2.92_v9.0.319-90.3.el9_4
Red Hat Enterprise Linux 9.6 Extended Update Support: all versions — fixed in 0:2026.2.92_v9.0.319-90.3.el9_6
Red Hat Hardened Images: all versions — fixed in 2026.2.92_v9.0.319-1.hum1
Red Hat OpenShift Builds 1.8.3: all versions — fixed in 1792835298, 1792835365, 1792836805, 1792837466, 1792837567, 1792838794
Red Hat OpenShift Builds 1.9.2: all versions — fixed in 1792835571, 1792835879, 1792837398, 1792837598, 1792838765, 1792839475
Red Hat OpenShift GitOps: all versions

How to fix

Upgrade to a fixed version: Red Hat Enterprise Linux 10 0:2026.2.92_v9.0.319-100.3.el10_2; Red Hat Enterprise Linux 10.0 Extended Update Support 0:2026.2.92_v9.0.319-100.3.el10_0; Red Hat Enterprise Linux 7 Extended Lifecycle Support 0:2026.2.92_v9.0.319-70.3.el7_9; Red Hat Enterprise Linux 8 0:2026.2.92_v9.0.319-81.3.el8_10; Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support 0:2026.2.92_v9.0.319-80.3.el8_4; Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support 0:2026.2.92_v9.0.319-80.3.el8_6; Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On 0:2026.2.92_v9.0.319-80.3.el8_6; Red Hat Enterprise Linux 8.8 Telecommunications Update Service 0:2026.2.92_v9.0.319-80.3.el8_8; Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions 0:2026.2.92_v9.0.319-80.3.el8_8; Red Hat Enterprise Linux 9 0:2026.2.92_v9.0.319-90.3.el9_8; Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions 0:2026.2.92_v9.0.319-90.3.el9_2; Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions 0:2026.2.92_v9.0.319-90.3.el9_4. Check the vendor advisory for mitigations.

References

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