CVE-2026-31545

Local service interruption via sleep-unsafe GPIO access

Published Apr 24, 2026 · Updated Apr 24, 2026

Improper GPIO access in the Linux kernel nxp-nci I2C driver allows local users to interrupt NFC service on affected systems. The nxp_nci_i2c_set_mode function calls gpiod_set_value for firmware and enable lines even when their GPIO controller can sleep. Reachability requires NXP NCI hardware whose lines use an I2C GPIO expander; the invalid atomic-context access raises a kernel warning and disrupts driver operation.

CVSS severity5.5
Medium
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper GPIO access in the Linux kernel nxp-nci I2C driver allows local users to interrupt NFC service on affected systems. The nxp_nci_i2c_set_mode function calls gpiod_set_value for firmware and enable lines even when their GPIO controller can sleep. Reachability requires NXP NCI hardware whose lines use an I2C GPIO expander; the invalid atomic-context access raises a kernel warning and disrupts driver operation.

The record

CVE
CVE-2026-31545
Published
Apr 24, 2026
Updated
Apr 24, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 24, 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=43201767b44cbd873c60dbd2acd370147588cb18 <0c2320c3c860d281cbc2f49fc574c1947a6b9e2a
  2. Affected versionversion=43201767b44cbd873c60dbd2acd370147588cb18 <2a175bc3c338c6b2bc55004e93dd35a2467bdca2
  3. Affected versionversion=43201767b44cbd873c60dbd2acd370147588cb18 <4de9ed2ea22d611b4149969266b45a86ea8daf35
  4. Affected versionversion=43201767b44cbd873c60dbd2acd370147588cb18 <548a1bfe591364e63bce4af7c5802bb434efdaf8
  5. Affected versionversion=43201767b44cbd873c60dbd2acd370147588cb18 <55dc632ab2ac2889b15995a9eef56c753d48ebc7
  6. Affected versionversion=43201767b44cbd873c60dbd2acd370147588cb18 <70662874f646871c2f08ef1cf2544ba9a5f71b96
  7. Affected versionversion=43201767b44cbd873c60dbd2acd370147588cb18 <783f05e560d761dee7ff602b97edb0e54f2e9727
  8. Affected versionversion=43201767b44cbd873c60dbd2acd370147588cb18 <c24dcac1a9d1b4fd164898df0c2f5b0adbf81a78
  9. Affected versionversion=5.4

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=43201767b44cbd873c60dbd2acd370147588cb18 <0c2320c3c860d281cbc2f49fc574c1947a6b9e2a; version=43201767b44cbd873c60dbd2acd370147588cb18 <2a175bc3c338c6b2bc55004e93dd35a2467bdca2; version=43201767b44cbd873c60dbd2acd370147588cb18 <4de9ed2ea22d611b4149969266b45a86ea8daf35; version=43201767b44cbd873c60dbd2acd370147588cb18 <548a1bfe591364e63bce4af7c5802bb434efdaf8; version=43201767b44cbd873c60dbd2acd370147588cb18 <55dc632ab2ac2889b15995a9eef56c753d48ebc7; version=43201767b44cbd873c60dbd2acd370147588cb18 <70662874f646871c2f08ef1cf2544ba9a5f71b96; version=43201767b44cbd873c60dbd2acd370147588cb18 <783f05e560d761dee7ff602b97edb0e54f2e9727; version=43201767b44cbd873c60dbd2acd370147588cb18 <c24dcac1a9d1b4fd164898df0c2f5b0adbf81a78; version=5.4

Published CVSS scores

5.5NVDCVSS: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 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

No sourced classifications are available.

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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