CVE-2026-28529 cryptodev-linux <= 1.14 get_userbuf Use After Free LPE
Local attackers can exploit a use-after-free flaw in the cryptodev-linux driver to achieve privilege escalation.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-28529?
CVE-2026-28529 is a high-severity use after free vulnerability in cryptodev-linux, published on 25 Mar 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
cryptodev-linux version 1.14 and prior contain a page reference handling flaw in the get_userbuf function of the /dev/crypto device driver that allows local users to trigger use-after-free conditions. Attackers with access to the /dev/crypto interface can repeatedly decrement reference counts of controlled pages to achieve local privilege escalation.
Weakness: CWE-416
Which versions are affected by CVE-2026-28529?
It affects 1 product.
Products include Cryptodev-Linux Cryptodev-Linux.
How do I fix CVE-2026-28529?
No fix has been published for CVE-2026-28529 yet. Limit exposure of the affected software until one is available.
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-2026-28529 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-28529 exists.
Sources
Also known as GHSA-vgx9-cpq5-rx9p.