CVE-2022-50305
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-09-15

Last updated on: 2025-12-04

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: ASoC: sof_es8336: fix possible use-after-free in sof_es8336_remove() sof_es8336_remove() calls cancel_delayed_work(). However, that function does not wait until the work function finishes. This means that the callback function may still be running after the driver's remove function has finished, which would result in a use-after-free. Fix by calling cancel_delayed_work_sync(), which ensures that the work is properly cancelled, no longer running, and unable to re-schedule itself.
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Meta Information
Published
2025-09-15
Last Modified
2025-12-04
Generated
2026-06-16
AI Q&A
2025-09-15
EPSS Evaluated
2026-06-15
NVD
CVE-2022-50305
Affected Vendors & Products
Showing 6 associated CPEs
Vendor Product Version / Range
linux linux_kernel From 6.0.11 (inc) to 6.0.16 (exc)
linux linux_kernel From 6.1.1 (inc) to 6.1.2 (exc)
linux linux_kernel 6.1
linux linux_kernel 6.1
linux linux_kernel 6.1
linux linux_kernel 6.1
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-416 The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.
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Executive Summary

This vulnerability is a use-after-free issue in the Linux kernel's sof_es8336 driver. The sof_es8336_remove() function calls cancel_delayed_work(), which does not wait for the delayed work's callback function to finish. As a result, the callback may still run after the driver has been removed, leading to use-after-free, where the code accesses memory that has already been freed. The fix involves using cancel_delayed_work_sync() to ensure the work is fully cancelled and not running after removal.

Impact Analysis

This vulnerability can lead to use-after-free conditions, which may cause system instability, crashes, or potentially allow an attacker to execute arbitrary code or escalate privileges by exploiting the improper memory handling in the driver.

Mitigation Strategies

Update the Linux kernel to a version that includes the fix for the sof_es8336 driver, where cancel_delayed_work() is replaced with cancel_delayed_work_sync() in sof_es8336_remove(). This ensures proper cancellation of delayed work and prevents use-after-free issues.

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