CVE-2026-45946

Kernel crash via racy ab8500 handle lifetime

Published May 27, 2026 · Updated May 27, 2026

Use-after-free in the Linux Kernel ab8500 power-supply driver allows local users to crash the system through a device-lifecycle race. IRQ registration occurs before power_supply handle registration, so reverse devm cleanup can free the handle while its interrupt handler remains active; probe can also expose an uninitialized handle. An interrupt during removal or probe makes power_supply_changed() dereference the invalid handle, causing a kernel crash or corrupting kernel memory.

CVSS severity7.8
High
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

Use-after-free in the Linux Kernel ab8500 power-supply driver allows local users to crash the system through a device-lifecycle race. IRQ registration occurs before power_supply handle registration, so reverse devm cleanup can free the handle while its interrupt handler remains active; probe can also expose an uninitialized handle. An interrupt during removal or probe makes power_supply_changed() dereference the invalid handle, causing a kernel crash or corrupting kernel memory.

The record

CVE
CVE-2026-45946
Published
May 27, 2026
Updated
May 27, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-416, T1499.004
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=1c1f13a006ed0d71bb5664c8b7e3e77a28da3beb <43cbb78ee047b9b12d096d40e3be265969d4c1f8
  2. Affected versionversion=1c1f13a006ed0d71bb5664c8b7e3e77a28da3beb <46dbda27b028d78087667e8280966b99cec015ca
  3. Affected versionversion=1c1f13a006ed0d71bb5664c8b7e3e77a28da3beb <551672981fe227122258a25a385a05f5c0746ad6
  4. Affected versionversion=1c1f13a006ed0d71bb5664c8b7e3e77a28da3beb <709db4b476e254579d9c48ec34d397a41ca0c407
  5. Affected versionversion=1c1f13a006ed0d71bb5664c8b7e3e77a28da3beb <847eeb6c0efcd76c7def73857cf798a4fcd8f79b
  6. Affected versionversion=1c1f13a006ed0d71bb5664c8b7e3e77a28da3beb <c4af8a98bb52825a5331ae1d0604c0ea6956ba4b
  7. Affected versionversion=1c1f13a006ed0d71bb5664c8b7e3e77a28da3beb <f50433f2603def08b21a4bf2fd238687fb5cbde9
  8. Affected versionversion=341db343768bc44f3512facc464021730d64071c
  9. Affected versionversion=5.13.4 <5.14
  10. Affected versionversion=5.14

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=1c1f13a006ed0d71bb5664c8b7e3e77a28da3beb <43cbb78ee047b9b12d096d40e3be265969d4c1f8; version=1c1f13a006ed0d71bb5664c8b7e3e77a28da3beb <46dbda27b028d78087667e8280966b99cec015ca; version=1c1f13a006ed0d71bb5664c8b7e3e77a28da3beb <551672981fe227122258a25a385a05f5c0746ad6; version=1c1f13a006ed0d71bb5664c8b7e3e77a28da3beb <709db4b476e254579d9c48ec34d397a41ca0c407; version=1c1f13a006ed0d71bb5664c8b7e3e77a28da3beb <847eeb6c0efcd76c7def73857cf798a4fcd8f79b; version=1c1f13a006ed0d71bb5664c8b7e3e77a28da3beb <c4af8a98bb52825a5331ae1d0604c0ea6956ba4b; version=1c1f13a006ed0d71bb5664c8b7e3e77a28da3beb <f50433f2603def08b21a4bf2fd238687fb5cbde9; version=341db343768bc44f3512facc464021730d64071c; version=5.13.4 <5.14; version=5.14

Published CVSS scores

7.8UbuntuCVSS: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 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-416Use After Free
T1499.004Application or System Exploitation

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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