CVE-2026-93156 crypto: rk3288 - fail ahash requests on HASH idle timeout
A flaw in the Linux kernel's RK3288 crypto driver allows denial of service by ignoring hash engine idle timeouts, potentially causing system hangs or crashes.
- 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-2026-93156?
CVE-2026-93156 is a denial of service vulnerability in Linux, published on 17 Sep 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:
crypto: rk3288 - fail ahash requests on HASH idle timeout
rk_hash_run() waits for RK_CRYPTO_HASH_STS to become idle after the final DMA transfer, but ignores the poll result. If the hash engine never becomes idle, the driver still reads the digest registers and finalizes the request with the previous success value.
Store the poll result and finalize the request with the timeout error before reading the digest registers.
Which versions are affected by CVE-2026-93156?
How do I fix CVE-2026-93156?
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-2026-93156 being exploited?
There is no known exploitation of CVE-2026-93156 in the wild and no public exploit code.
Sources
Also known as AZL-103007, BELL-CVE-2026-93156, DEBIAN-CVE-2026-93156, GHSA-88xq-5v8h-f73h, UBUNTU-CVE-2026-93156.