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Review reviewHigh

CVE-2025-21915

Linux Linux, linux kernel

In the Linux kernel, the following vulnerability has been resolved: cdx: Fix possible UAF error in driver_override_show() Fixed a possible UAF problem in driver_override_show() in drivers/cdx/cdx.c This function driver_override_show() is part of DEVICE_ATTR_RW, which includes both driver_override_show() and driver_override_store(). These functions can be executed concurrently in sysfs. The driver_override_store() function uses driver_set_override() to update the driver_override value, and driver_set_override() internally locks the device (device_lock(dev)). If driver_override_show() reads c...

CVSS
7.8
EPSS
0.19%
9.33% percentile
CISA KEV
Not listed
Published
2025.04.02
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.19%
Technical severityCVSS 7.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: cdx: Fix possible UAF error in driver_override_show() Fixed a possible UAF problem in driver_override_show() in drivers/cdx/cdx.c This function driver_override_show() is part of DEVICE_ATTR_RW, which includes both driver_override_show() and driver_override_store(). These functions can be executed concurrently in sysfs. The driver_override_store() function uses driver_set_override() to update the driver_override value, and driver_set_override() internally locks the device (device_lock(dev)). If driver_override_show() reads c...

Affected product and versions

Product
Linux Linux, linux kernel
Affected versions
>= 2959ab247061e67485d83b6af8feb3761ec08cb9 < d7b339bbc887bcfc1a5b620bfc70c6fbb8f733bf, >= 2959ab247061e67485d83b6af8feb3761ec08cb9 < 8473135f89c0949436a22adb05b8cece2fb3da91, >= 2959ab247061e67485d83b6af8feb3761ec08cb9 < 0439d541aa8d3444ad41c39e39eb71acb57acde3, >= 2959ab247061e67485d83b6af8feb3761ec08cb9 < 91d44c1afc61a2fec37a9c7a3485368309391e0b, >= 6.4, >= 6.4 < 6.6.83, >= 6.7 < 6.12.19, >= 6.13 < 6.13.7, 6.14
Fixed versions
6.6.83, 6.12.19, 6.13.7

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux Linux, linux kernel and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-416