CVE-2026-68395 ata: sata_dwc_460ex: enable SATA interrupts only after IRQ handler is registered
A race condition in the Linux kernel SATA driver can cause a spurious interrupt storm if initialization fails, 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-2026-68395?
CVE-2026-68395 is a denial of service vulnerability in Linux, published on 10 Aug 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:
ata: sata_dwc_460ex: enable SATA interrupts only after IRQ handler is registered
sata_dwc_enable_interrupts() is called before platform_get_irq() and ata_host_activate(), leaving the SATA controller's interrupt mask enabled without a registered handler. If a later step fails (irq request, phy init, etc.) or if the controller asserts an interrupt during probe, the irq line may fire with no handler, causing a spurious interrupt storm.
Move sata_dwc_enable_interrupts() after ata_host_activate() so that interrupts are only unmasked once the handler is registered and the core is fully initialized.
Which versions are affected by CVE-2026-68395?
How do I fix CVE-2026-68395?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-68395 being exploited?
There is no known exploitation of CVE-2026-68395 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2026-68395, DEBIAN-CVE-2026-68395, GHSA-958q-f6w8-qqgc, UBUNTU-CVE-2026-68395.