CVE-2023-54197

Local kernel crash via unchecked work cancellation

Published Dec 30, 2025 · Updated Dec 30, 2025

NULL pointer dereference in affected Linux kernel releases allows local users to crash the system during Bluetooth SDIO device removal. The btsdio_remove function calls cancel_work_sync on data->work before checking whether the driver-data pointer is NULL. Reachability requires local low-privileged access and the Bluetooth SDIO removal path; the documented consequence is a kernel crash only.

CVSS severity6.8
Medium
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in affected Linux kernel releases allows local users to crash the system during Bluetooth SDIO device removal. The btsdio_remove function calls cancel_work_sync on data->work before checking whether the driver-data pointer is NULL. Reachability requires local low-privileged access and the Bluetooth SDIO removal path; the documented consequence is a kernel crash only.

The record

CVE
CVE-2023-54197
Published
Dec 30, 2025
Updated
Dec 30, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 30, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 30, 2025Record 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=1e9ac114c4428fdb7ff4635b45d4f46017e8916f <d8d7ce037d9a8f1f0714ece268c4c2c50845bbc3
  2. Affected versionversion=1e9ac114c4428fdb7ff4635b45d4f46017e8916f <db2bf510bd5d57f064d9e1db395ed86a08320c54
  3. Affected versionversion=6.3
  4. Affected versionversion=8efae2112d910d8e5166dd0a836791b08721eef1 <a789192f366147a0fbb395650079906d1d04e0b9
  5. Affected versionversion=95eacef5692545f199fae4e52abfbfa273acb351 <3b4ed52009723f7dfca7a8ca95163bfb441bfb76
  6. Affected versionversion=a18fb433ceb56e0787546a9d77056dd0f215e762 <de0ffb5145c9f418ad76f00e58d4b91c680410b2
  7. Affected versionversion=af4d48754d5517d33bac5e504ff1f1de0808e29e <70a104588e3131415e559c06deb834ce259a285a
  8. Affected versionversion=c59c65a14e8f7d738429648833f3bb3f9df0513f <8f83fa62614c282dd5d1211a0dd99c6a0a515b81
  9. Affected versionversion=cbf8deacb7053ce3e3fed64b277c6c6989e65bba <952030c914b5f2288609efe868537afcff7a3f51
  10. Affected versionversion=da3d3fdfb4d523c5da30e35a8dd90e04f0fd8962 <0837d10f6c37a47a0c73bccf1e39513613a2fcc2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=1e9ac114c4428fdb7ff4635b45d4f46017e8916f <d8d7ce037d9a8f1f0714ece268c4c2c50845bbc3; version=1e9ac114c4428fdb7ff4635b45d4f46017e8916f <db2bf510bd5d57f064d9e1db395ed86a08320c54; version=6.3; version=8efae2112d910d8e5166dd0a836791b08721eef1 <a789192f366147a0fbb395650079906d1d04e0b9; version=95eacef5692545f199fae4e52abfbfa273acb351 <3b4ed52009723f7dfca7a8ca95163bfb441bfb76; version=a18fb433ceb56e0787546a9d77056dd0f215e762 <de0ffb5145c9f418ad76f00e58d4b91c680410b2; version=af4d48754d5517d33bac5e504ff1f1de0808e29e <70a104588e3131415e559c06deb834ce259a285a; version=c59c65a14e8f7d738429648833f3bb3f9df0513f <8f83fa62614c282dd5d1211a0dd99c6a0a515b81; version=cbf8deacb7053ce3e3fed64b277c6c6989e65bba <952030c914b5f2288609efe868537afcff7a3f51; version=da3d3fdfb4d523c5da30e35a8dd90e04f0fd8962 <0837d10f6c37a47a0c73bccf1e39513613a2fcc2

Published CVSS scores

5.5SUSECVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
6.8SUSECVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499Endpoint Denial of Service

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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