Threats Tagged 'cve-2026-19569'
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Threats Tagged 'cve-2026-19569'
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0 CVE-2026-19569 is an integer overflow vulnerability in the Zephyr kernel's dynamic object allocation code. It occurs when user-mode threads provide a size value close to the maximum unsigned integer, causing arithmetic wrap-around and resulting in undersized heap allocations. This allows an unprivileged user-mode thread to perform out-of-bounds writes in supervisor mode, potentially corrupting kernel memory and escaping the userspace sandbox. Exploitation requires specific kernel configurations (CONFIG_USERSPACE and CONFIG_DYNAMIC_OBJECTS) and a thread with an assigned resource pool. The vulnerability affects Zephyr versions from 3.5.0 through 4.4.2. A fix has been implemented to reject overflowing size computations and free partially built descriptors. Join the discussion | CVE Database V5 | 10/09/2026, 07:16:45 UTC Added: 10/09/2026, 07:34:00 UTC |
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