CVE-2023-52884

Kernel warning via unlocked cyapa suspend and resume

Published Jun 21, 2024 · Updated May 11, 2026

Improper locking in the Linux kernel cyapa driver from 5.11 allows local users to trigger a kernel warning during suspend or resume. The cyapa_suspend() and cyapa_resume() paths call input_device_enabled() without holding input->mutex, leaving input state unchecked under the required lock. Reachability requires high privileges, a cyapa device, and a system suspend or resume cycle; the observed consequence is a kernel warning and tainted state.

CVSS severity4.4
Medium
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper locking in the Linux kernel cyapa driver from 5.11 allows local users to trigger a kernel warning during suspend or resume. The cyapa_suspend() and cyapa_resume() paths call input_device_enabled() without holding input->mutex, leaving input state unchecked under the required lock. Reachability requires high privileges, a cyapa device, and a system suspend or resume cycle; the observed consequence is a kernel warning and tainted state.

The record

CVE
CVE-2023-52884
Published
Jun 21, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-667
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Jun 21, 2024CVE 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=5.11
  2. Affected versionversion=d69f0a43c677e8afc67a222e1e7b51b9acc69cd3 <7b4e0b39182cf5e677c1fc092a3ec40e621c25b6
  3. Affected versionversion=d69f0a43c677e8afc67a222e1e7b51b9acc69cd3 <9400caf566f65c703e99d95f87b00c4b445627a7
  4. Affected versionversion=d69f0a43c677e8afc67a222e1e7b51b9acc69cd3 <a4c638ab25786bd5aab5978fe51b2b9be16a4ebd
  5. Affected versionversion=d69f0a43c677e8afc67a222e1e7b51b9acc69cd3 <a5fc298fa8f67cf1f0e1fc126eab70578cd40adc
  6. Affected versionversion=d69f0a43c677e8afc67a222e1e7b51b9acc69cd3 <f99809fdeb50d65bcbc1661ef391af94eebb8a75

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linuxversion=5.11; version=d69f0a43c677e8afc67a222e1e7b51b9acc69cd3 <7b4e0b39182cf5e677c1fc092a3ec40e621c25b6; version=d69f0a43c677e8afc67a222e1e7b51b9acc69cd3 <9400caf566f65c703e99d95f87b00c4b445627a7; version=d69f0a43c677e8afc67a222e1e7b51b9acc69cd3 <a4c638ab25786bd5aab5978fe51b2b9be16a4ebd; version=d69f0a43c677e8afc67a222e1e7b51b9acc69cd3 <a5fc298fa8f67cf1f0e1fc126eab70578cd40adc; version=d69f0a43c677e8afc67a222e1e7b51b9acc69cd3 <f99809fdeb50d65bcbc1661ef391af94eebb8a75

Published CVSS scores

4.4CISA-ADPCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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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
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-667Improper Locking

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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