High [CVE-2026-82623] Denial of service via use-after-free vulnerability
This high-severity Red Hat Linux advisory covers CVE-2026-82623.
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Summary
A vulnerability was detected in open62541 up to 1.5.5. Affected by this vulnerability is the function UA_DataValue_backend_copyRange of the file plugins/historydata/ua_history_data_backend_memory.c of the component History Backend.
The manipulation results in use after free. The attack can be launched remotely.
The exploit is now public and may be used. The project closed the issue report, stating that this is not the official way to report a security vulnerability.
This flaw could lead to a denial of service, making the affected system unavailable. The open62541 library is not shipped in any Red Hat product.
It is available in the Fedora community distribution, which already ships version 1.5.6, beyond the affected range (up to 1.5.5). Red Hat severity: Important — CVSS 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).
Weakness: CWE-825.
- 1.5.5
Official advisory · high-confidence parse· fetched 57 minutes ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · high-confidence parse· fetched 57 minutes ago·verify at source
Mitigation checklist
- Update open62541 to version 1.5.6 or later.
Official advisory · high-confidence parse· fetched 57 minutes ago·verify at source
Discussion(0)
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