Red Hat Security Advisory: Red Hat OpenShift Service Mesh 3.3.3
Red Hat OpenShift Service Mesh 3.3.3, which is based on the open source Istio project, addresses a variety of problems in a microservice architecture by creating a centralized point of control in an application. Security Fix(es): * istio-proxyv2-rhel9: Possible memory corruption after bound check elimination (CVE-2026-27143) * istio-pilot-rhel9: Possible memory corruption after bound check elimination (CVE-2026-27143) * istio-cni-rhel9: Possible memory corruption after bound check elimination (CVE-2026-27143) * istio-rhel9-operator: no-op interface conversion bypasses overlap checking (CVE-2026-27144) * istio-proxyv2-rhel9: no-op interface conversion bypasses overlap checking (CVE-2026-27144) * istio-pilot-rhel9: no-op interface conversion bypasses overlap checking (CVE-2026-27144) * istio-cni-rhel9: no-op interface conversion bypasses overlap checking (CVE-2026-27144) * istio-rhel9-operator: Denial of service in certificate chain building when using Go applications (CVE-2026-32280) * istio-pilot-rhel9: Denial of service in certificate chain building when using Go applications (CVE-2026-32280) * istio-cni-rhel9: Denial of service in certificate chain building when using Go applications (CVE-2026-32280) Fixes/Improvements: * OSSM 3 Operator icon missing from OperatorHub catalog in OCP console (OSSM-13028) * Applying proxy configuration takes a long time on the FIPS cluster (OSSM-12929) * Revert changes done for OSSM-12845 (OSSM-13222) * Revert changes done for OSSM-12930 (OSSM-13223)
AI Analysis
Technical Summary
Red Hat OpenShift Service Mesh 3.3.3, based on the Istio project, fixes several vulnerabilities: CVE-2026-27143 involves possible memory corruption after bound check elimination in istio-proxyv2-rhel9, istio-pilot-rhel9, and istio-cni-rhel9; CVE-2026-27144 concerns no-op interface conversion bypassing overlap checking affecting istio-rhel9-operator, istio-proxyv2-rhel9, istio-pilot-rhel9, and istio-cni-rhel9; CVE-2026-32280 is a denial of service vulnerability in certificate chain building when using Go applications impacting istio-rhel9-operator, istio-pilot-rhel9, and istio-cni-rhel9. These vulnerabilities could lead to memory corruption or denial of service conditions. The advisory does not provide CVSS scores but classifies the impact as important/high severity.
Potential Impact
The vulnerabilities may cause memory corruption and denial of service in critical components of the OpenShift Service Mesh, potentially affecting the stability and security of microservice communication and certificate handling within the mesh. No known exploits in the wild have been reported. The impact is considered high due to the nature of memory corruption and denial of service in core service mesh components.
Mitigation Recommendations
Red Hat has released OpenShift Service Mesh version 3.3.3 which includes fixes for these vulnerabilities. Users should upgrade to this version to remediate the issues. No additional mitigation steps are specified or required beyond applying the official update. Patch status is confirmed by the vendor advisory.
Red Hat Security Advisory: Red Hat OpenShift Service Mesh 3.3.3
Description
Red Hat OpenShift Service Mesh 3.3.3, which is based on the open source Istio project, addresses a variety of problems in a microservice architecture by creating a centralized point of control in an application. Security Fix(es): * istio-proxyv2-rhel9: Possible memory corruption after bound check elimination (CVE-2026-27143) * istio-pilot-rhel9: Possible memory corruption after bound check elimination (CVE-2026-27143) * istio-cni-rhel9: Possible memory corruption after bound check elimination (CVE-2026-27143) * istio-rhel9-operator: no-op interface conversion bypasses overlap checking (CVE-2026-27144) * istio-proxyv2-rhel9: no-op interface conversion bypasses overlap checking (CVE-2026-27144) * istio-pilot-rhel9: no-op interface conversion bypasses overlap checking (CVE-2026-27144) * istio-cni-rhel9: no-op interface conversion bypasses overlap checking (CVE-2026-27144) * istio-rhel9-operator: Denial of service in certificate chain building when using Go applications (CVE-2026-32280) * istio-pilot-rhel9: Denial of service in certificate chain building when using Go applications (CVE-2026-32280) * istio-cni-rhel9: Denial of service in certificate chain building when using Go applications (CVE-2026-32280) Fixes/Improvements: * OSSM 3 Operator icon missing from OperatorHub catalog in OCP console (OSSM-13028) * Applying proxy configuration takes a long time on the FIPS cluster (OSSM-12929) * Revert changes done for OSSM-12845 (OSSM-13222) * Revert changes done for OSSM-12930 (OSSM-13223)
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Red Hat OpenShift Service Mesh 3.3.3, based on the Istio project, fixes several vulnerabilities: CVE-2026-27143 involves possible memory corruption after bound check elimination in istio-proxyv2-rhel9, istio-pilot-rhel9, and istio-cni-rhel9; CVE-2026-27144 concerns no-op interface conversion bypassing overlap checking affecting istio-rhel9-operator, istio-proxyv2-rhel9, istio-pilot-rhel9, and istio-cni-rhel9; CVE-2026-32280 is a denial of service vulnerability in certificate chain building when using Go applications impacting istio-rhel9-operator, istio-pilot-rhel9, and istio-cni-rhel9. These vulnerabilities could lead to memory corruption or denial of service conditions. The advisory does not provide CVSS scores but classifies the impact as important/high severity.
Potential Impact
The vulnerabilities may cause memory corruption and denial of service in critical components of the OpenShift Service Mesh, potentially affecting the stability and security of microservice communication and certificate handling within the mesh. No known exploits in the wild have been reported. The impact is considered high due to the nature of memory corruption and denial of service in core service mesh components.
Mitigation Recommendations
Red Hat has released OpenShift Service Mesh version 3.3.3 which includes fixes for these vulnerabilities. Users should upgrade to this version to remediate the issues. No additional mitigation steps are specified or required beyond applying the official update. Patch status is confirmed by the vendor advisory.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:16537
- Cve Count
- 3
- Additional Cves
- ["CVE-2026-27144","CVE-2026-32280"]
- Cvss Version
- null
Threat ID: 6a16097be29bf47b50647b8c
Added to database: 05/26/2026, 20:58:35 UTC
Last enriched: 07/30/2026, 11:06:59 UTC
Last updated: 07/31/2026, 19:22:58 UTC
Views: 94
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.