CVE-2026-28529

cryptodev-linux <= 1.14 get_userbuf Use After Free LPE

CVSS 8.5 HIGHEPSS 0.1%CWE-416

Vexday Risk Score

21Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 8.5EPSS 0.1%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

25 Mar 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

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

Affected products

cryptodev-linux · cryptodev-linux

References

https://gist.github.com/n4sm/0fd2479e0c23e0fa2f192cd8fda45750 https://github.com/cryptodev-linux/cryptodev-linux/pull/104 https://nasm.re/posts/cryptodev-linux-vuln/https://www.vulncheck.com/advisories/cryptodev-linux-get-userbuf-use-after-free-lpe