CVE-2026-45885

Privileged system crash via cpcap-battery teardown race

Published May 27, 2026 · Updated May 27, 2026

Use-after-free in the Linux Kernel cpcap-battery driver allows local users to crash the system during device removal. The driver requests its IRQ before registering the power_supply handle, so reverse devm cleanup frees the handle before unregistering the handler and power_supply_changed() dereferences freed memory. Reaching the removal race requires CAP_SYS_ADMIN access to sysfs driver controls; the documented outcome is a crash or silent kernel-memory corruption.

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 cpcap-battery driver allows local users to crash the system during device removal. The driver requests its IRQ before registering the power_supply handle, so reverse devm cleanup frees the handle before unregistering the handler and power_supply_changed() dereferences freed memory. Reaching the removal race requires CAP_SYS_ADMIN access to sysfs driver controls; the documented outcome is a crash or silent kernel-memory corruption.

The record

CVE
CVE-2026-45885
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
admin

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=4.13
  2. Affected versionversion=874b2adbed1253a11549cb9b7b912ab65fea9cf2 <2841bbb5a35c4449c0a0458e8e476b2a62f95147
  3. Affected versionversion=874b2adbed1253a11549cb9b7b912ab65fea9cf2 <2ce2334be155bd8bad6377e99984246ce4dbd08c
  4. Affected versionversion=874b2adbed1253a11549cb9b7b912ab65fea9cf2 <3ff75cba1c98349a23a8f9333981deba1972cc11
  5. Affected versionversion=874b2adbed1253a11549cb9b7b912ab65fea9cf2 <642f33e34b969eedec334738fd5df95d2dc42742
  6. Affected versionversion=874b2adbed1253a11549cb9b7b912ab65fea9cf2 <c549dd3de4b3f6e726d1b8386d40ccf7d3abdbe4
  7. Affected versionversion=874b2adbed1253a11549cb9b7b912ab65fea9cf2 <cbb9b07f88a9ef6518934c41eb3e8cf840d657d5
  8. Affected versionversion=874b2adbed1253a11549cb9b7b912ab65fea9cf2 <e261be6f18929f2397cd54cd583a2df624c129c1
  9. Affected versionversion=874b2adbed1253a11549cb9b7b912ab65fea9cf2 <f3fbe309c9bfe1aac1e2b26543e9dc4829f3275a

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linux Kernelversion=4.13; version=874b2adbed1253a11549cb9b7b912ab65fea9cf2 <2841bbb5a35c4449c0a0458e8e476b2a62f95147; version=874b2adbed1253a11549cb9b7b912ab65fea9cf2 <2ce2334be155bd8bad6377e99984246ce4dbd08c; version=874b2adbed1253a11549cb9b7b912ab65fea9cf2 <3ff75cba1c98349a23a8f9333981deba1972cc11; version=874b2adbed1253a11549cb9b7b912ab65fea9cf2 <642f33e34b969eedec334738fd5df95d2dc42742; version=874b2adbed1253a11549cb9b7b912ab65fea9cf2 <c549dd3de4b3f6e726d1b8386d40ccf7d3abdbe4; version=874b2adbed1253a11549cb9b7b912ab65fea9cf2 <cbb9b07f88a9ef6518934c41eb3e8cf840d657d5; version=874b2adbed1253a11549cb9b7b912ab65fea9cf2 <e261be6f18929f2397cd54cd583a2df624c129c1; version=874b2adbed1253a11549cb9b7b912ab65fea9cf2 <f3fbe309c9bfe1aac1e2b26543e9dc4829f3275a

Published CVSS scores

6.3SUSECVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:H
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
Privilegesadmin
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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