CVE-2026-28529
cryptodev-linux <= 1.14 get_userbuf Use After Free LPE
- State
- Published
- Severity
- 8.5 High
- Published
- Mar 25, 2026
- Updated
- Jul 14, 2026
- Reserved
- Feb 27, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 8.5 High | 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 | VulnCheck |
Weaknesses
- CWE-416 Use After Free (CWE-416)
Affected Products
| Product | Versions |
|---|---|
cryptodev-linuxcryptodev-linux |
|
References
- https://nasm.re/posts/cryptodev-linux-vuln/technical-descriptionexploit
- https://gist.github.com/n4sm/0fd2479e0c23e0fa2f192cd8fda45750exploit
- https://github.com/cryptodev-linux/cryptodev-linux/pull/104issue-tracking
- https://www.vulncheck.com/advisories/cryptodev-linux-get-userbuf-use-after-free-lpethird-party-advisory
Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.