CVE-2026-28529

high

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.

References

Exploits
More

https://nasm.re/posts/cryptodev-linux-vuln/

https://gist.github.com/n4sm/0fd2479e0c23e0fa2f192cd8fda45750

https://www.vulncheck.com/advisories/cryptodev-linux-get-userbuf-use-after-free-lpe

https://github.com/cryptodev-linux/cryptodev-linux/pull/104

Details

Source: Mitre, NVD

Published: 2026-03-25

Updated: 2026-03-25

Risk Information

CVSS v2

Base Score: 6.8

Vector: CVSS2#AV:L/AC:L/Au:N/C:P/I:C/A:C

Severity: Medium

CVSS v3

Base Score: 7.8

Vector: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Severity: High

CVSS v4

Base Score: 8.5

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

Severity: High