CVE-2026-11812 - UpdateHub Vulnerability Causes DoS
CVE-2026-11812 - UpdateHub Vulnerability 🚨
The UpdateHub management subsystem has been identified with a critical vulnerability that can lead to a denial of service (DoS) due to a race condition on shared context. This issue arises from the management subsystem driving every update operation through a single file-scope context structure.
Key Details:
- Affected Vendor: zephyrproject
- Affected Product: zephyr
- Versions Affected: 2.0.0 to 4.4.1
- CVSS Score: AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L
- CWE: CWE-362
Description:
The vulnerability occurs because access to the context structure was not serialized, allowing concurrent mutations from two independent paths: the background autohandler and user-triggered operations. This can lead to an out-of-bounds write, potentially corrupting the internal state of the update subsystem and causing a denial of service.
Mitigation:
The fix involves serializing the entry points with a mutex and adding a bounds check to the function responsible for preparing file descriptors.
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