CVE-2025-32989

MEDIUM
Published Jul 10, 2025 Modified May 12, 2026 CWE-295

Description

A heap-buffer-overread vulnerability was found in GnuTLS in how it handles the Certificate Transparency (CT) Signed Certificate Timestamp (SCT) extension during X.509 certificate parsing. This flaw allows a malicious user to create a certificate containing a malformed SCT extension (OID 1.3.6.1.4.1.11129.2.4.2) that contains sensitive data. This issue leads to the exposure of confidential information when GnuTLS verifies certificates from certain websites when the certificate (SCT) is not checked correctly.

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CVSS v3.1 Score

5.3
MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Weakness Type (CWE)

CWE-295 CWE-295

Affected Products

Vendor Product
gnu gnutls
redhat openshift_container_platform
redhat enterprise_linux
redhat enterprise_linux
redhat enterprise_linux
redhat enterprise_linux
redhat enterprise_linux

References

Frequently Asked Questions

What is CVE-2025-32989? +
A heap-buffer-overread vulnerability was found in GnuTLS in how it handles the Certificate Transparency (CT) Signed Certificate Timestamp (SCT) extension during X.509 certificate parsing. This flaw allows a malicious user to create a certificate containing a malformed SCT extension (OID 1.3.6.1.4.1.11129.2.4.2) that contains sensitive data. This issue leads to the exposure of confidential information when GnuTLS verifies certificates from certain websites when the certificate (SCT) is not checked correctly. It has a CVSS v3.1 base score of 5.3 (MEDIUM).
How severe is CVE-2025-32989? +
CVE-2025-32989 has a CVSS v3.1 score of 5.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.
What products are affected by CVE-2025-32989? +
CVE-2025-32989 affects products from gnu, redhat, specifically: enterprise_linux, gnutls, openshift_container_platform. Check the affected products table above for specific version ranges.
How do I check if I'm vulnerable to CVE-2025-32989? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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