CVE-2026-45938

System crash via IRQ lifetime race

Published May 27, 2026 · Updated May 27, 2026

Use-after-free in the Linux Kernel pm8916_lbc power-supply driver allows local users to crash the system during driver removal. The driver requests its managed IRQ before registering the managed power_supply handle, so reverse-order cleanup can free the handle while the IRQ remains live and power_supply_changed() dereferences it. Reachability requires the pm8916_lbc driver and an interrupt in the removal window; an early probe interrupt can instead use an uninitialized handle, causing memory corruption or a crash.

CVSS severity7.8
High
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in the Linux Kernel pm8916_lbc power-supply driver allows local users to crash the system during driver removal. The driver requests its managed IRQ before registering the managed power_supply handle, so reverse-order cleanup can free the handle while the IRQ remains live and power_supply_changed() dereferences it. Reachability requires the pm8916_lbc driver and an interrupt in the removal window; an early probe interrupt can instead use an uninitialized handle, causing memory corruption or a crash.

The record

CVE
CVE-2026-45938
Published
May 27, 2026
Updated
May 27, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-416, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 27, 2026CVE publishedPublication date reported by the CVE source.
  2. May 27, 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=6.7
  2. Affected versionversion=f8d7a3d21160a0cab4d15b81231f2a76b0fcee13 <08e674e9862a2db46fb234eb7c5442455ece0131
  3. Affected versionversion=f8d7a3d21160a0cab4d15b81231f2a76b0fcee13 <b7508129978ae1e2ed9b0410396abc05def9c4eb
  4. Affected versionversion=f8d7a3d21160a0cab4d15b81231f2a76b0fcee13 <d7d31fc99d248d5f47588f50dce5c7599c991c6a
  5. Affected versionversion=f8d7a3d21160a0cab4d15b81231f2a76b0fcee13 <dbe579e620ef0f53db490ec79a8566e4ea8918ac

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=6.7; version=f8d7a3d21160a0cab4d15b81231f2a76b0fcee13 <08e674e9862a2db46fb234eb7c5442455ece0131; version=f8d7a3d21160a0cab4d15b81231f2a76b0fcee13 <b7508129978ae1e2ed9b0410396abc05def9c4eb; version=f8d7a3d21160a0cab4d15b81231f2a76b0fcee13 <d7d31fc99d248d5f47588f50dce5c7599c991c6a; version=f8d7a3d21160a0cab4d15b81231f2a76b0fcee13 <dbe579e620ef0f53db490ec79a8566e4ea8918ac

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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