CVE-2026-67855

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{"bugzilla": {"description": "open62541: open62541: Denial of Service via heap use-after-free", "id": "2511248", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2511248"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-825", "details": ["A flaw was found in open62541. This heap use-after-free vulnerability, occurring in the GDS PushManagement certificate update workflow when UA_ENABLE_GDS_PUSHMANAGEMENT is enabled, allows a remote attacker to cause a denial of service (DoS). This could lead to the affected system becoming unavailable."], "name": "CVE-2026-67855", "public_date": "2026-08-04T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-67855\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-67855\nhttps://github.com/open62541/open62541\nhttps://github.com/open62541/open62541/blob/master/arch/posix/eventloop_posix.c\nhttps://github.com/open62541/open62541/blob/master/examples/encryption/server_encryption.c\nhttps://github.com/open62541/open62541/blob/master/src/server/ua_server_internal.h\nhttps://github.com/open62541/open62541/blob/master/src/server/ua_server_ns0_gds.c\nhttps://github.com/open62541/open62541/issues/8093"], "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": null}], "enrichment": {"confidence": 90.0, "confidence_source": "inferred", "scores": [{"score": 90.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "n/a", "source": "cna", "vendor": "n/a"}, "product": "open62541", "vendor": "open62541"}], "created": "2026-08-04T22:30:05.155676+00:00", "updated": "2026-08-05T20:30:06.780661+00:00", "vendors": ["open62541", "open62541$PRODUCT$open62541"]}