Threats Tagged 'cve-2026-18747'
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Threats Tagged 'cve-2026-18747'
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0 CVE-2026-18747 is an integer underflow vulnerability in the Zephyr project's MCUmgr SMP-over-console transport. The flaw occurs when a malformed base64-encoded packet with a declared length of zero is processed, causing an underflow in buffer length calculation. This leads to an out-of-bounds read in the SMP request processing, potentially causing denial of service or memory disclosure. The vulnerability can be triggered by an unauthenticated 7-byte input line on the management console, which is often accessible via USB CDC-ACM ports. The issue affects Zephyr versions from 1.11.0 up to but not including 4.4.2. A fix is available that rejects packet lengths of two bytes or fewer to prevent the underflow. Join the discussion | CVE Database V5 | 09/28/2026, 23:25:26 UTC Added: 09/29/2026, 01:57:31 UTC |
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