CVE-2026-90128 vdpa/mlx5: fix wrong list iterated in add_direct_chain error path
A logic error in the Linux kernel's vdpa/mlx5 driver causes incorrect memory cleanup on error paths, potentially leading to system instability or 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-2026-90128?
CVE-2026-90128 is a 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:
vdpa/mlx5: fix wrong list iterated in add_direct_chain error path
In add_direct_chain(), newly allocated direct MR entries are added to the local list 'tmp', which is spliced into mr->head only on success. On the error path, the cleanup loop was incorrectly iterating over mr->head instead of tmp.
Fix by iterating over 'tmp' in the err_alloc cleanup path.
Which versions are affected by CVE-2026-90128?
How do I fix CVE-2026-90128?
Apply the vendor's patch.
Is CVE-2026-90128 being exploited?
There is no known exploitation of CVE-2026-90128 in the wild and no public exploit code.
Sources
Also known as AZL-102287, BELL-CVE-2026-90128, DEBIAN-CVE-2026-90128, GHSA-578j-pcj4-7hf3, UBUNTU-CVE-2026-90128.