Vulnerability · Published Mar 25, 2026 · Assigned by VulnCheck
CVE-2026-28529cryptodev-linux <= 1.14 get_userbuf Use After Free LPE
High 8.5
In plain English
A high-severity use-after-free in cryptodev-linux from cryptodev-linux. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 7% of all known vulnerabilities).
Severity (CVSS 4.0)8.5High
Exploit odds (30 days)0.2%top 92.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| cryptodev-linux | cryptodev-linux | 0 – through 1.14 |
Weakness: CWE-416 · Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
References
- https://nasm.re/posts/cryptodev-linux-vuln/ technical-description, exploit
- https://gist.github.com/n4sm/0fd2479e0c23e0fa2f192cd8fda45750 exploit
- https://github.com/cryptodev-linux/cryptodev-linux/pull/104 issue-tracking
- https://www.vulncheck.com/advisories/cryptodev-linux-get-userbuf-use-after-free-lpe third-party-advisory