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Linux KernelOperating system · Linux

CVE-2025-38540

MEDIUM · 5.5 CVSS v3.1 Published 2025-08-16
Fix available
A fix is available. Upgrade to 5.4.296 / 5.10.240 or later.
See remediation →
57/100
Remediation priority · Elevated
Zero-click Patch available

Official description Straight from the sourceThe vendor's or NVD's own wording, published unedited. Authoritative, but often terse — it says what broke, rarely what to do.

NVD · unedited
In the Linux kernel, the following vulnerability has been resolved: HID: quirks: Add quirk for 2 Chicony Electronics HP 5MP Cameras The Chicony Electronics HP 5MP Cameras (USB ID 04F2:B824 & 04F2:B82C) report a HID sensor interface that is not actually implemented. Attempting to access this non-functional sensor via iio_info causes system hangs as runtime PM tries to wake up an unresponsive sensor. Add these 2 devices to the HID ignore list since the sensor interface is non-functional by design and should not be exposed to userspace.

Technical summary Written by usOur analysis, written from the advisory, the CVSS vector and the affected-version data. It adds context the advisory leaves out, and never invents facts that are not in the source.

dbcve analysis

A detailed technical summary for this CVE is being prepared.

Affected products & versions What the vendor confirmedThe version ranges the vendor confirmed as vulnerable. If your version sits inside a range here, treat yourself as exposed until you have upgraded.

NVD · CPE data
Linux KernelOperating system
Affected:>= 3.8, < 5.4.296>= 5.5, < 5.10.240>= 5.11, < 5.15.189>= 5.16, < 6.1.146>= 6.2, < 6.6.99>= 6.7, < 6.12.39>= 6.13, < 6.15.7= 6.16
Debian LinuxOperating system
Affected:= 11.0

CVSS breakdown How the score is builtThe industry scoring standard. It rates how the flaw is reached, what it takes to exploit, and what an attacker gains — the score is derived from those, not the other way round.

From the vector
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

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

Remediation Closing itWhat it takes to close this. Where a vendor fix exists we point at it; where none exists we say so plainly, and can build one. Effort estimates are scoped from the advisory, not from your codebase.

dbcve · scoped
Upgrade available Upgrade to 5.4.296 / 5.10.240 / 5.15.189 or later
Fixed in 5.4.2965.10.2405.15.189
Vendor patch git.kernel.org →
Recommended fix High confidence

Upgrade to kernel version 5.4.296 or later (for 5.4.y branch), 5.10.240 or later (for 5.10.y branch), 5.15.189 or later (for 5.15.y branch), or 6.1.146 or later (for 6.1.y branch). For Debian 11, upgrade to a newer Debian kernel from bullseye-backports or consider migrating to Debian 12 for newer ke

  1. Identify the current running kernel version using `uname -r`
  2. For Debian 11 (bullseye), check available kernel updates via `apt update && apt-cache policy linux-image-*`
  3. Upgrade the kernel to a version containing the fix: 5.4.296+, 5.10.240+, 5.15.189+, or 6.1.146+ depending on which kernel branch is in use
  4. Reboot the system to load the fixed kernel
  5. Verify the fix is applied by checking that the device IDs 04F2:B824 and 04F2:B82C are added to the HID ignore list in `/drivers/hid/hid-quirks.c` or by confirming the kernel version after reboot
Caveat Kernel upgrades may introduce compatibility changes with proprietary modules or specific hardware drivers; ensure backup and test in non-production environment first

Generated from the published advisory — verify against the referenced sources before acting.

We can perform the upgrade in your staging environment and verify nothing breaks — typical engagement from $1,600. Get the upgrade done

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References Go to the primary sourcePrimary sources — vendor advisories, patches and trackers. Where our summary and a reference disagree, the reference wins.

Primary sources

Practitioner notes

Contributed

Peer-ranked notes from engineers who’ve handled CVE-2025-38540 in production — separate from our analysis above.

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What this is

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What belongs here
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  • Version or environment caveats, and links to real fixes
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