CVE-2026-98848Medium· 4.1▾ SunlitA flaw was found in the Linux kernel's AC100 Real-Time Clock (RTC) driver. During device probing, the driver accesses an internal array before initializing its element counter. On systems compiled with runtime bounds checking enabled, this…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 22.5 · likelihood 0 · exploitation 0
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Exploit-prediction probability, daily snapshots since Oct 20.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CSAF
0.2%
Last analysed / modified upstream
— → 4.1
none → medium
A flaw was found in the Linux kernel's AC100 Real-Time Clock (RTC) driver. During device probing, the driver accesses an internal array before initializing its element counter. On systems compiled with runtime bounds checking enabled, this premature access triggers an out-of-bounds trap, allowing a local user capable of triggering device initialization to crash the system, resulting in a Denial of Service (DoS).
kernel: rtc: ac100: Assign .num before accessing .hws — rated Moderate by Red Hat. Released 2026-10-18, updated 2026-10-23.
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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