CVE-2026-3012: Insufficient Verification of Data Authenticity in Red Hat Red Hat Enterprise Linux 10
A flaw was found in Samba’s certificate auto-enrollment Group Policy handling. When certificate auto-enrollment is enabled, Samba may retrieve a CA certificate over an unencrypted HTTP connection and install it into the local trust store without proper verification. An attacker with the ability to intercept or redirect network traffic could exploit this behavior to supply a malicious certificate authority certificate, potentially allowing interception or spoofing of trusted communications.
AI Analysis
Technical Summary
The vulnerability CVE-2026-3012 affects Samba's certificate auto-enrollment Group Policy feature, where the retrieval of CA certificates occurs over HTTP without validation. This insufficient verification of data authenticity (CWE-345) can be exploited by an attacker with network interception capabilities to introduce a malicious CA certificate into the local trust store, compromising trust relationships. The issue affects Red Hat Enterprise Linux versions 8 (>=8.0.0 <8.10) and 10 (>=10.0.0 <10.2). Red Hat has issued security advisories RHSA-2026:22644 and RHSA-2026:22963 providing patches that fix this vulnerability along with other Samba security issues.
Potential Impact
Successful exploitation allows an attacker who can intercept or redirect network traffic to supply a malicious certificate authority certificate to the affected system. This can lead to interception or spoofing of trusted communications, compromising confidentiality and integrity of data. The CVSS v3.1 score is 8.0 (High), reflecting the complexity of attack (high), no privileges required, no user interaction, and impact to confidentiality and integrity but not availability.
Mitigation Recommendations
Red Hat has released official security updates that fix this vulnerability. Users should apply the updated Samba packages provided in Red Hat Enterprise Linux 8.10 and 10.2 or later as described in Red Hat advisories RHSA-2026:22644 and RHSA-2026:22963. The vendor advisory confirms the availability of patches and recommends updating to these fixed versions to remediate the issue.
CVE-2026-3012: Insufficient Verification of Data Authenticity in Red Hat Red Hat Enterprise Linux 10
Description
A flaw was found in Samba’s certificate auto-enrollment Group Policy handling. When certificate auto-enrollment is enabled, Samba may retrieve a CA certificate over an unencrypted HTTP connection and install it into the local trust store without proper verification. An attacker with the ability to intercept or redirect network traffic could exploit this behavior to supply a malicious certificate authority certificate, potentially allowing interception or spoofing of trusted communications.
CVSS v3.1
Score 8.0high
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability CVE-2026-3012 affects Samba's certificate auto-enrollment Group Policy feature, where the retrieval of CA certificates occurs over HTTP without validation. This insufficient verification of data authenticity (CWE-345) can be exploited by an attacker with network interception capabilities to introduce a malicious CA certificate into the local trust store, compromising trust relationships. The issue affects Red Hat Enterprise Linux versions 8 (>=8.0.0 <8.10) and 10 (>=10.0.0 <10.2). Red Hat has issued security advisories RHSA-2026:22644 and RHSA-2026:22963 providing patches that fix this vulnerability along with other Samba security issues.
Potential Impact
Successful exploitation allows an attacker who can intercept or redirect network traffic to supply a malicious certificate authority certificate to the affected system. This can lead to interception or spoofing of trusted communications, compromising confidentiality and integrity of data. The CVSS v3.1 score is 8.0 (High), reflecting the complexity of attack (high), no privileges required, no user interaction, and impact to confidentiality and integrity but not availability.
Mitigation Recommendations
Red Hat has released official security updates that fix this vulnerability. Users should apply the updated Samba packages provided in Red Hat Enterprise Linux 8.10 and 10.2 or later as described in Red Hat advisories RHSA-2026:22644 and RHSA-2026:22963. The vendor advisory confirms the availability of patches and recommends updating to these fixed versions to remediate the issue.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- redhat
- Date Reserved
- 2026-02-23T07:08:58.479Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://access.redhat.com/security/cve/CVE-2026-3012","vendor":"Red Hat"}]
Threat ID: 6a16c886e29bf47b50b1dae9
Added to database: 05/27/2026, 10:33:42 UTC
Last enriched: 07/15/2026, 09:06:36 UTC
Last updated: 07/31/2026, 19:22:58 UTC
Views: 228
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