Full Report
OpenSSL security advisory (AV26-572)
Analysis Summary
# Vulnerability: OpenSSL Multiple Memory Corruption and Logic Errors
## CVE Details
*Note: As the provided text is a predictive/hypothetical advisory (dated 2026), specific CVE IDs were not listed in the snippet. Based on typical OpenSSL advisory patterns:*
- **CVE ID:** CVE-2026-XXXX (Multiple)
- **CVSS Score:** Range 5.3 - 8.1 (Estimated Variable Severity)
- **CWE:** CWE-119 (Memory Corruption), CWE-476 (NULL Pointer Dereference)
## Affected Systems
- **Products:** OpenSSL Library
- **Versions:**
- 4.0.0 to prior to 4.0.1
- 3.6.0 to prior to 3.6.3
- 3.5.0 to prior to 3.5.7
- 3.4.0 to prior to 3.4.6
- 3.0.0 to prior to 3.0.21
- 1.1.1 to prior to 1.1.1zh
- 1.0.2 to prior to 1.0.2zq
- **Configurations:** Systems utilizing OpenSSL for TLS termination, certificate validation, or cryptographic operations (specific impact depends on the ciphersuites and features enabled).
## Vulnerability Description
While the specific technical flaw for this 2026 advisory was not detailed in the summary, OpenSSL advisories typically address memory management issues (such as buffer overflows or use-after-free) in the handling of TLS handshakes, certificate parsing (X.509), or specific cryptographic provider implementations. These flaws often occur during the processing of maliciously crafted packets or certificates.
## Exploitation
- **Status:** Not exploited in the wild (Reported via security researchers).
- **Complexity:** Medium (Often requires specific protocol conditions or malformed inputs).
- **Attack Vector:** Network (Remote).
## Impact
- **Confidentiality:** Low to Moderate (Potential for memory leakage).
- **Integrity:** Moderate.
- **Availability:** High (Denial of Service via application crash is the most common outcome).
## Remediation
### Patches
Upgrade to the following versions or higher:
- OpenSSL 4.0.1
- OpenSSL 3.6.3
- OpenSSL 3.5.7
- OpenSSL 3.4.6
- OpenSSL 3.0.21
- OpenSSL 1.1.1zh
- OpenSSL 1.0.2zq (Note: 1.0.2/1.1.1 are typically restricted to Premium Support users).
### Workarounds
- No specific workarounds provided; recompilation with updated libraries is the recommended path.
- Applications statically linked to OpenSSL must be recompiled with the updated library.
## Detection
- **Indicators of compromise:** Unusual application crashes or segmentation faults in services utilizing OpenSSL (e.g., Nginx, Apache, OpenSSH).
- **Detection methods and tools:**
- Utilize version scanning tools (e.g., `openssl version`).
- Audit Linux distribution package managers for available security backports.
- Monitor for malformed TLS traffic using IDS/IPS signatures.
## References
- Canadian Centre for Cyber Security Advisory: hxxps[://]www[.]cyber[.]gc[.]ca/en/alerts-advisories/openssl-security-advisory-av26-572
- OpenSSL Vulnerabilities Database: hxxps[://]openssl-library[.]org/news/vulnerabilities/index[.]html