CVE-2026-28529
HIGHcryptodev-linux <= 1.14 get_userbuf Use After Free LPE
Title source: cnaDescription
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 (4)
Core 4
Core References
Exploit technical-description
exploit
https://nasm.re/posts/cryptodev-linux-vuln/
Exploit exploit
https://gist.github.com/n4sm/0fd2479e0c23e0fa2f192cd8fda45750
Third Party Advisory third-party-advisory
https://www.vulncheck.com/advisories/cryptodev-linux-get-userbuf-use-after-free-lpe
Scores
CVSS v4
8.5
EPSS
0.0012
EPSS Percentile
2.1%
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/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
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
total
Details
CWE
CWE-416
Status
published
Products (1)
cryptodev-linux/cryptodev-linux
< 1.14
Published
Mar 25, 2026
Tracked Since
Mar 25, 2026