CVE-2026-28529 Details
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.
A use-after-free vulnerability has been identified in the Cryptodev-Linux kernel module, specifically in versions through 1.14. The issue arises in the 'get_userbuf' function of the '/dev/crypto' device driver, where improper handling of page references allows local users to decrement the reference counts of controlled pages. This exploitation can lead to the freeing of pages while they are still accessible, creating a use-after-free condition that can be leveraged for local privilege escalation.
Users can update to Cryptodev-Linux version 1.15 or later, where this vulnerability has been fixed.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Mar 25, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://gist.github.com/n4sm/0fd2479e0c23e0fa2f192cd8fda45750 | [email protected] | Exploit |
| https://github.com/cryptodev-linux/cryptodev-linux/pull/104 | [email protected] | PatchThird Party Advisory |
| https://nasm.re/posts/cryptodev-linux-vuln/ | [email protected] | Third Party Advisory |
| https://www.vulncheck.com/advisories/cryptodev-linux-get-userbuf-use-after-free-lpe | [email protected] | Third Party Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-416 | Use After Free | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| cryptodev-linux cryptodev-linux | <= 1.14 |
CPE
Remediation
| |
Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Aug 17, 2026 | Initial Analysis | [email protected] |
| Jul 14, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Mar 25, 2026 | New CVE Received | [email protected] |