CVE-2026-98676 iio: adc: ade9000: fix NULL pointer dereference in clkout registration
A NULL pointer dereference in the ADE9000 ADC driver causes a kernel crash when probing with specific clock configurations, leading to denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-98676?
CVE-2026-98676 is a vulnerability in Linux, published on 18 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
iio: adc: ade9000: fix NULL pointer dereference in clkout registration
ade9000_setup_clkout() passes NULL as the register address when registering a divider clock. During clock registration, the common clock framework calls clk_divider_recalc_rate(), which dereferences the address through readl(). As a result, probing an ADE9000 configured as a clock provider with an external input clock crashes.
CLKOUT passes CLKIN through without changing its rate. Register it as a 1:1 fixed-factor clock, which does not require register access.
This change does not affect the configuration using the internal clock, for which the driver does not register a clock provider.
Which versions are affected by CVE-2026-98676?
How do I fix CVE-2026-98676?
Apply the vendor's patch.
Is CVE-2026-98676 being exploited?
There is no known exploitation of CVE-2026-98676 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-98676, DEBIAN-CVE-2026-98676, GHSA-qchf-h949-mmvh, UBUNTU-CVE-2026-98676.