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Vulnerability record · CVE-2026-28529 · published 25 March 2026

CVE-2026-28529: Cryptodev-linux use after free vulnerability

CCryptodev Linux · Cryptodev Linux

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.

8.5 CVSS 4.0 High EPSS 0.18% · top 93.1% CWE-416 · Use after free
8.5CVSS 4.0 base score
0.18%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References, 1 tagged exploit
17 Aug 2026Last modified by NVD

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.

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:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

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

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-28529), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.