CVE-2026-80975Medium· 5.5▾ SunlitA flaw was found in the Linux kernel's `qnap-mcu` driver. This vulnerability occurs when the driver processes commands and a reply from the Microcontroller Unit (MCU) arrives after a command has timed out or failed. The driver may write th…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 30.3 · likelihood 0 · exploitation 0
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Exploit-prediction probability, daily snapshots since Sep 12.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CSAF
0.2%
— → 5.7
none → medium
— → 5.7
none → medium
— → 7.8
none → high
Last analysed / modified upstream
7.8 → 5.7
high → medium
7.8 → 5.7
high → medium
5.7 → 5.5
A flaw was found in the Linux kernel's qnap-mcu driver. This vulnerability occurs when the driver processes commands and a reply from the Microcontroller Unit (MCU) arrives after a command has timed out or failed. The driver may write this late or unsolicited message into a memory area that is no longer in use, leading to memory corruption. This can result in system instability or a denial of service.
kernel: mfd: qnap-mcu: keep the reply buffer alive past a command timeout — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-14.
Not affected:
Refer to the advisory for fix availability.
Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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