An integer overflow in the UA_Variant arrayDimensions product computation in open62541 may allow a remote attacker to trigger an out-of-bounds write. (CVE-2026-65423)
An integer overflow vulnerability exists in the UA_Variant arrayDimensions product computation in open62541. This flaw may allow a remote attacker to trigger an out-of-bounds write, potentially leading to code execution or denial of service. The vulnerability is identified as CVE-2026-65423 and affects specific versions of open62541. The CVSS v3.1 base score is 8.8, indicating a high severity impact on confidentiality, integrity, and availability. No known exploits are reported in the wild. Patch availability is not confirmed from the provided data.
AI Analysis
Technical Summary
CVE-2026-65423 describes an integer overflow in the UA_Variant arrayDimensions product computation within the open62541 library. This overflow can cause an out-of-bounds write, which may be exploited remotely to compromise system integrity or availability. The vulnerability affects open62541 versions =1.4.11.1-1 and =1.4.11.1-1build1. The CVSS 3.1 vector indicates network attack vector, low attack complexity, low privileges required, no user interaction, unchanged scope, and high impact on confidentiality, integrity, and availability.
Potential Impact
Successful exploitation could allow a remote attacker to perform an out-of-bounds write, potentially leading to arbitrary code execution or denial of service. The high CVSS score reflects the critical impact on confidentiality, integrity, and availability. There are no known exploits in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a patch is available, consider restricting network access to the affected service and monitoring for anomalous behavior related to UA_Variant processing.
An integer overflow in the UA_Variant arrayDimensions product computation in open62541 may allow a remote attacker to trigger an out-of-bounds write. (CVE-2026-65423)
Description
An integer overflow vulnerability exists in the UA_Variant arrayDimensions product computation in open62541. This flaw may allow a remote attacker to trigger an out-of-bounds write, potentially leading to code execution or denial of service. The vulnerability is identified as CVE-2026-65423 and affects specific versions of open62541. The CVSS v3.1 base score is 8.8, indicating a high severity impact on confidentiality, integrity, and availability. No known exploits are reported in the wild. Patch availability is not confirmed from the provided data.
CVSS v3.1
Score 8.8high
Affected software
pkg:deb/ubuntu/open62541?arch=source&distro=resoluteRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-65423 describes an integer overflow in the UA_Variant arrayDimensions product computation within the open62541 library. This overflow can cause an out-of-bounds write, which may be exploited remotely to compromise system integrity or availability. The vulnerability affects open62541 versions =1.4.11.1-1 and =1.4.11.1-1build1. The CVSS 3.1 vector indicates network attack vector, low attack complexity, low privileges required, no user interaction, unchanged scope, and high impact on confidentiality, integrity, and availability.
Potential Impact
Successful exploitation could allow a remote attacker to perform an out-of-bounds write, potentially leading to arbitrary code execution or denial of service. The high CVSS score reflects the critical impact on confidentiality, integrity, and availability. There are no known exploits in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a patch is available, consider restricting network access to the affected service and monitoring for anomalous behavior related to UA_Variant processing.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- UBUNTU-CVE-2026-65423
- Osv Schema Version
- 1.7.0
- Aliases
- []
- Ecosystems
- ["Ubuntu:26.04:LTS"]
- Database Specific Severity
- null
- Cvss Version
- 3.1
Threat ID: 6a74cfb4bf8831d5391b296d
Added to database: 08/06/2026, 18:17:24 UTC
Last enriched: 08/06/2026, 19:42:25 UTC
Last updated: 08/07/2026, 02:07:40 UTC
Views: 5
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