CVE-2026-93158 crypto: sa2ul - stop probe if context pool creation fails
A flaw in the Linux kernel's sa2ul crypto driver allows denial of service if DMA pool creation fails during probe, requiring a kernel patch.
- 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-2026-93158?
CVE-2026-93158 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: sa2ul - stop probe if context pool creation fails
sa_ul_probe() calls sa_init_mem() to create the DMA pool used for security context buffers, but ignores its return value. If pool creation fails, probe still continues with DMA setup, algorithm registration and child population even though later request setup depends on that pool.
Stop probing when sa_init_mem() fails, and route that failure to the PM cleanup path without attempting to destroy an uncreated DMA pool.
Which versions are affected by CVE-2026-93158?
How do I fix CVE-2026-93158?
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-2026-93158 being exploited?
There is no known exploitation of CVE-2026-93158 in the wild and no public exploit code.
Sources
Also known as AZL-102162, BELL-CVE-2026-93158, DEBIAN-CVE-2026-93158, GHSA-x4wf-3pq8-hcp4, UBUNTU-CVE-2026-93158.