CVE-2026-28529 cryptodev-linux CVE debrief

Who should care

System administrators and users of cryptodev-linux version 1.14 and prior should be aware of this vulnerability. This vulnerability can be exploited by local attackers to gain elevated privileges.

Technical summary

The vulnerability is located in the get_userbuf function of the /dev/crypto device driver in cryptodev-linux version 1.14 and prior. A local attacker can exploit this vulnerability by repeatedly decrementing reference counts of controlled pages, leading to use-after-free conditions and potentially allowing for local privilege escalation. The affected product deployments should be reviewed, and owners should be assigned for follow-up. Official advisories or CVE records should be consulted to validate affected scope, severity, and vendor guidance.

Defensive priority

High

Recommended defensive actions

• Apply patches or updates provided by the vendor to fix the vulnerability
• Restrict access to the /dev/crypto interface to authorized users only
• Monitor system logs for suspicious activity related to the /dev/crypto interface
• Consider implementing additional security controls, such as SELinux or AppArmor, to restrict access to sensitive resources
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Track exceptions, retest remediated assets, and close the item only after evidence is documented

Evidence notes

The CVE record was published on 2026-03-25T14:16:33.690Z and was last modified on 2026-07-14T19:16:54.580Z. The NVD entry is currently Awaiting Analysis. Multiple sources, including Vulncheck and GitHub, provide additional information about the vulnerability. However, details are limited, and defenders should verify the affected scope and vendor guidance with caution. The vulnerability affects cryptodev-linux version 1.14 and prior, but specific deployment details and potential impact are not provided.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.