CVE-2024-39493: crypto: qat - Fix ADF_DEV_RESET_SYNC memory leak

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-07-10 · updated 2026-10-15
Weakness: CWE-401

Description

In the Linux kernel, the following vulnerability has been resolved: crypto: qat - Fix ADF_DEV_RESET_SYNC memory leak Using completion_done to determine whether the caller has gone away only works after a complete call. Furthermore it's still possible that the caller has not yet called wait_for_completion, resulting in another potential UAF. Fix this by making the caller use cancel_work_sync and then freeing the memory safely.

Affected products

Linux kernel: from 4.19.312 before 4.19.316; from 5.4.274 before 5.4.278; from 5.10.215 before 5.10.219; from 5.15.154 before 5.15.161; from 6.1.84 before 6.1.94; from 6.6.24 before 6.6.34 — fixed in 4.19.316, 5.10.219, 5.15.161, 5.4.278, 6.1.94, 6.6.34

How to fix

Upgrade to a fixed version: Linux kernel 4.19.316, 5.10.219, 5.15.161, 5.4.278. Check the vendor advisory for mitigations.

References

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