Use After Free in Cryptodev-Linux
CVE-2026-28529
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.
Vulnerability class: Use-After-Free
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.002 (7.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 7th percentile — 7.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000
Affected products
- Cryptodev-Linux — versions 0
Weakness classification (CWE)
References
- nasm.re/posts/cryptodev-linux-vuln/ (technical-description, Third Party Advisory, exploit)
- gist.github.com/n4sm/0fd2479e0c23e0fa2f192cd8fda45750 (Exploit, exploit)
- github.com/cryptodev-linux/cryptodev-linux/pull/104 (issue-tracking, Patch, Third Party Advisory, patch)
- www.vulncheck.com/advisories/cryptodev-linux-get-userbuf-use-after-free-lpe (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2026-28529?
- CVE-2026-28529 is a high-severity vulnerability in Cryptodev-Linux, classified under Use After Free. CVSS score: 7.8/10. Published 2026-03-25.
- How severe is CVE-2026-28529?
- High severity. CVSS v3 base score is 7.8 out of 10.