CVE-2023-53277

Kernel crash via unchecked workqueue allocation

Published Sep 16, 2025 · Updated Sep 16, 2025

NULL pointer dereference in Linux 2.6.24 through 6.2.2 allows local users to crash the kernel through the iwl3945 Wi-Fi driver. The il3945_setup_deferred_work function stores create_singlethread_workqueue's unchecked NULL return in the driver's workqueue pointer, and PCI probe continues initialization. Reachability requires an Intel 3945 adapter, driver probing, low-privileged local access, and a workqueue allocation failure; the bounded consequence is a kernel crash.

CVSS severity5.5
Medium
EPSS probability0.16%
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 Linux 2.6.24 through 6.2.2 allows local users to crash the kernel through the iwl3945 Wi-Fi driver. The il3945_setup_deferred_work function stores create_singlethread_workqueue's unchecked NULL return in the driver's workqueue pointer, and PCI probe continues initialization. Reachability requires an Intel 3945 adapter, driver probing, low-privileged local access, and a workqueue allocation failure; the bounded consequence is a kernel crash.

The record

CVE
CVE-2023-53277
Published
Sep 16, 2025
Updated
Sep 16, 2025
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 16, 2025CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 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=2.6.24
  2. Affected versionversion=b481de9ca074528fe8c429604e2777db8b89806a <17e07d6587c55015956862ef3b101fd45fa49fbc
  3. Affected versionversion=b481de9ca074528fe8c429604e2777db8b89806a <1fdeb8b9f29dfd64805bb49475ac7566a3cb06cb
  4. Affected versionversion=b481de9ca074528fe8c429604e2777db8b89806a <2f80b3ff92514ebd227e5c55d3d1e480401b02b7
  5. Affected versionversion=b481de9ca074528fe8c429604e2777db8b89806a <34f611204ae589bd5c494b10b41fb13436bd3c3f
  6. Affected versionversion=b481de9ca074528fe8c429604e2777db8b89806a <3ae2fc4de12686f3fe695824169c1272c9f798f7
  7. Affected versionversion=b481de9ca074528fe8c429604e2777db8b89806a <505c74c4c0b1c5bcaa98a93b3087c268156070f1
  8. Affected versionversion=b481de9ca074528fe8c429604e2777db8b89806a <7e594abc0424e4f8c2385f11aefeaadcfc507aa5

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.24; version=b481de9ca074528fe8c429604e2777db8b89806a <17e07d6587c55015956862ef3b101fd45fa49fbc; version=b481de9ca074528fe8c429604e2777db8b89806a <1fdeb8b9f29dfd64805bb49475ac7566a3cb06cb; version=b481de9ca074528fe8c429604e2777db8b89806a <2f80b3ff92514ebd227e5c55d3d1e480401b02b7; version=b481de9ca074528fe8c429604e2777db8b89806a <34f611204ae589bd5c494b10b41fb13436bd3c3f; version=b481de9ca074528fe8c429604e2777db8b89806a <3ae2fc4de12686f3fe695824169c1272c9f798f7; version=b481de9ca074528fe8c429604e2777db8b89806a <505c74c4c0b1c5bcaa98a93b3087c268156070f1; version=b481de9ca074528fe8c429604e2777db8b89806a <7e594abc0424e4f8c2385f11aefeaadcfc507aa5

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5CISA-ADPCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
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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