PT-2026-27766 · Cryptodev Linux · Cryptodev-Linux

Nasm · Published 2026-03-25 · Updated 2026-03-25 · CVE-2026-28529

NVD

CVSS v4.0

8.5

High

AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

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.

Exploit

Fix

Use After Free

Weakness Enumeration

CWE-416

Related Identifiers

CVE-2026-28529

Affected Products

Cryptodev-Linux

References · 6

• 🔥 https://gist.github.com/n4sm/0fd2479e0c23e0fa2f192cd8fda45750 · Exploit
• 🔥 https://nasm.re/posts/cryptodev-linux-vuln · Exploit
• https://github.com/cryptodev-linux/cryptodev-linux/pull/104 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-28529 · Security Note
• https://twitter.com/nasm_re/status/2036824536054972656 · Twitter Post
• https://vulncheck.com/advisories/cryptodev-linux-get-userbuf-use-after-free-lpe · Note