Summaryinfo

A vulnerability marked as critical has been reported in Linux Kernel up to 6.13.3/6.14-rc2. Affected is the function cancel_delayed_work_sync. The manipulation leads to use after free. This vulnerability is documented as CVE-2025-21797. There is not any exploit available. It is suggested to upgrade the affected component. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.13.3/6.14-rc2. It has been rated as critical. This issue affects the function cancel_delayed_work_sync. The manipulation with an unknown input leads to a use after free vulnerability. Using CWE to declare the problem leads to CWE-416. Referencing memory after it has been freed can cause a program to crash, use unexpected values, or execute code. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: HID: corsair-void: Add missing delayed work cancel for headset status The cancel_delayed_work_sync() call was missed, causing a use-after-free in corsair_void_remove().

It is possible to read the advisory at git.kernel.org. The identification of this vulnerability is CVE-2025-21797 since 12/29/2024. The exploitation is known to be easy. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 01/18/2026).

The vulnerability scanner Nessus provides a plugin with the ID 246877 (Linux Distros Unpatched Vulnerability : CVE-2025-21797), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 6.13.4 or 6.14-rc3 eliminates this vulnerability. Applying the patch 2dcb56a0a4da6946f6c18288da595c13e0d2af86/48e487b002891eb0aeaec704c9bed51f028deff1 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the databases at Tenable (246877) and CERT Bund (WID-SEC-2025-0453). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Affected

• Google Container-Optimized OS
• Debian Linux
• Amazon Linux 2
• Red Hat Enterprise Linux
• Ubuntu Linux
• SUSE Linux
• Oracle Linux
• Siemens SIMATIC S7
• RESF Rocky Linux
• Dell NetWorker
• Dell Avamar
• Red Hat OpenShift
• IBM QRadar SIEM
• SolarWinds Security Event Manager
• Dell PowerProtect Data Domain
• Open Source Linux Kernel
• IBM DataPower Gateway
• Dell Secure Connect Gateway
• Dell PowerScale OneFS

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 6.13.0
• 6.13.1
• 6.13.2
• 6.13.3
• 6.14-rc1
• 6.14-rc2

License

• open-source

Website

• Vendor: https://www.kernel.org/

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