CVE-2026-80833 crypto: sun8i-ss - Remove crypto_rng interface
A use-after-free vulnerability in the sun8i-ss crypto driver allows local attackers to execute code or cause a 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-2026-80833?
CVE-2026-80833 is an use after free vulnerability in Linux, published on 4 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: sun8i-ss - Remove crypto_rng interface
Since the crypto_rng interface for hardware PRNGs is unused and is redundant with hwrng and the actual Linux RNG, it's being phased out. Most drivers for it were already removed. Go ahead and remove the sun8i-ss support which is one of the only remaining ones.
As usual for crypto_rng, this driver was also buggy: its ->generate() function had a use-after-free vulnerability due to using wait_for_completion_interruptible_timeout() without handling shutting down the DMA operation if a signal is sent. Also, it had a buffer overread bug in the line 'memcpy(ctx->seed, d + dlen, ctx->slen);'. There's no point in fixing these bugs separately only to remove the code anyway, so this commit is marked with Fixes and Cc stable.
Which versions are affected by CVE-2026-80833?
How do I fix CVE-2026-80833?
Apply the vendor's patch.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2026-80833 being exploited?
There is no known exploitation of CVE-2026-80833 in the wild and no public exploit code.
Sources
Also known as AZL-99573, BELL-CVE-2026-80833, DEBIAN-CVE-2026-80833, GHSA-qw2f-jr36-6mwm, UBUNTU-CVE-2026-80833.