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{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,5.9.0]"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "wolfSSL", "source": "cna", "vendor": "wolfSSL"}, "product": "wolfssl", "vendor": "wolfssl"}], "analysis": {"en": {"generated_at": "2026-04-09T23:50:31.921032+00:00", "value": {"mitigation_remediation": ["Update wolfSSL to the latest patched version that eliminates the unchecked free operation.", "If an upgrade is not immediately feasible, disable session caching or ensure strict validation of session data before attempting to free.", "Monitor application logs for abnormal crash or memory error patterns that may indicate exploitation attempts."], "summary": {"action": "Apply Patch", "impact": "Memory corruption from an arbitrary free"}, "threat_synthesis": {"affected_systems": "The vulnerability affects the wolfSSL library across all versions that include the described session restore code. No specific version range is provided, so any release containing this code may be impacted until a patch is applied.", "description_and_impact": "When wolfSSL restores a session from cache, it uses a pointer extracted from the serialized session data to perform a free operation without validating that pointer. This deserialization flaw permits an attacker to trigger an arbitrary memory free, which can lead to program termination or serve as a stepping stone for more complex memory corruption attacks.", "risk_and_exploitability": "The CVSS score of 4.1 indicates moderate severity, and the vulnerability is not listed in CISA\u2019s KEV catalog, suggesting limited known exploitation. Based on the description, it is inferred that an attacker must be able to inject a crafted session into the cache and trigger the session restore APIs. This capability could be achieved if an application exposes an endpoint that accepts session data. Successful exploitation could result in denial of service or an oracle for further attacks via memory corruption."}}}}, "created": "2026-04-10T08:36:39.576140+00:00", "updated": "2026-04-10T09:27:37.284057+00:00", "vendors": ["wolfssl", "wolfssl$PRODUCT$wolfssl"]}