CVE-2025-21797

Kernel memory corruption via uncanceled status work

Published Feb 27, 2025 · Updated May 11, 2026

Use-after-free in Linux kernel 6.13 through 6.13.3 allows local users to corrupt kernel memory during Corsair Void headset removal. The corsair_void_remove() teardown omits cancellation of delayed_status_work, so the queued status callback can run after its driver data is freed. A Corsair Void headset must be bound to the driver, and exploitation requires local low-privileged access; effects include kernel compromise or crash.

CVSS severity7.8
High
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in Linux kernel 6.13 through 6.13.3 allows local users to corrupt kernel memory during Corsair Void headset removal. The corsair_void_remove() teardown omits cancellation of delayed_status_work, so the queued status callback can run after its driver data is freed. A Corsair Void headset must be bound to the driver, and exploitation requires local low-privileged access; effects include kernel compromise or crash.

The record

CVE
CVE-2025-21797
Published
Feb 27, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 27, 2025CVE publishedPublication date reported by the CVE source.
  2. May 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=6.13
  2. Affected versionversion=6ea2a6fd3872e60a4d500b548ad65ed94e459ddd <2dcb56a0a4da6946f6c18288da595c13e0d2af86
  3. Affected versionversion=6ea2a6fd3872e60a4d500b548ad65ed94e459ddd <48e487b002891eb0aeaec704c9bed51f028deff1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.13; version=6ea2a6fd3872e60a4d500b548ad65ed94e459ddd <2dcb56a0a4da6946f6c18288da595c13e0d2af86; version=6ea2a6fd3872e60a4d500b548ad65ed94e459ddd <48e487b002891eb0aeaec704c9bed51f028deff1

Published CVSS scores

7.8CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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