Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update
A vulnerability in OpenSSL affects the OCSP response checking mechanism used during TLS certificate verification. A malicious TLS server can send a specially crafted OCSP response that causes a memory leak in client applications with OCSP checking enabled. Repeated connections to such a server may exhaust client memory, resulting in a denial of service (DoS). This issue is tracked as CVE-2026-54876 and is addressed in Red Hat Hardened Images RPMs updates.
AI Analysis
Technical Summary
CVE-2026-54876 is a memory leak vulnerability in OpenSSL's OCSP response checking process. When a client verifies an X.509 certificate chain, a malicious TLS server can send a crafted OCSP response that triggers a memory leak in the client. This leak can accumulate over repeated connections, potentially exhausting client memory and causing a denial of service. The vulnerability is categorized under CWE-772 (Missing Release of Resource after Effective Lifetime). Red Hat has released updated RPM packages for their Hardened Images to address this issue.
Potential Impact
The vulnerability can lead to denial of service on client systems due to memory exhaustion caused by a memory leak during OCSP response processing. There is no impact on confidentiality or integrity, only availability is affected. No known exploits are reported in the wild at this time.
Mitigation Recommendations
Red Hat has released updated RPM packages for Red Hat Hardened Images that include fixes for this vulnerability. Users should apply these updates as provided by Red Hat to remediate the issue. No additional mitigations are specified or required beyond applying the official update.
Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update
Description
A vulnerability in OpenSSL affects the OCSP response checking mechanism used during TLS certificate verification. A malicious TLS server can send a specially crafted OCSP response that causes a memory leak in client applications with OCSP checking enabled. Repeated connections to such a server may exhaust client memory, resulting in a denial of service (DoS). This issue is tracked as CVE-2026-54876 and is addressed in Red Hat Hardened Images RPMs updates.
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-54876 is a memory leak vulnerability in OpenSSL's OCSP response checking process. When a client verifies an X.509 certificate chain, a malicious TLS server can send a crafted OCSP response that triggers a memory leak in the client. This leak can accumulate over repeated connections, potentially exhausting client memory and causing a denial of service. The vulnerability is categorized under CWE-772 (Missing Release of Resource after Effective Lifetime). Red Hat has released updated RPM packages for their Hardened Images to address this issue.
Potential Impact
The vulnerability can lead to denial of service on client systems due to memory exhaustion caused by a memory leak during OCSP response processing. There is no impact on confidentiality or integrity, only availability is affected. No known exploits are reported in the wild at this time.
Mitigation Recommendations
Red Hat has released updated RPM packages for Red Hat Hardened Images that include fixes for this vulnerability. Users should apply these updates as provided by Red Hat to remediate the issue. No additional mitigations are specified or required beyond applying the official update.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-5cfw-78wc-wvjq
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-54876"]
Threat ID: 6a738523bf8831d5394efd8d
Added to database: 08/05/2026, 18:46:59 UTC
Last enriched: 09/16/2026, 05:15:20 UTC
Last updated: 09/19/2026, 10:01:32 UTC
Views: 38
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