CVE-2025-21982

Kernel crash via unchecked allocation result

Published Apr 1, 2025 · Updated May 11, 2026

NULL-pointer dereference in the Linux kernel 6.7 NPCM8XX pinctrl/GPIO driver allows local users to crash the kernel. The npcm8xx_gpio_fw function fails to check whether devm_kasprintf returned NULL before using the allocated firmware-node name, causing a NULL-pointer dereference. Triggering requires a local low-privilege context, the NPCM8XX driver path, and an allocation failure; the resulting fault interrupts the host.

CVSS severity5.5
Medium
EPSS probability0.19%
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 the Linux kernel 6.7 NPCM8XX pinctrl/GPIO driver allows local users to crash the kernel. The npcm8xx_gpio_fw function fails to check whether devm_kasprintf returned NULL before using the allocated firmware-node name, causing a NULL-pointer dereference. Triggering requires a local low-privilege context, the NPCM8XX driver path, and an allocation failure; the resulting fault interrupts the host.

The record

CVE
CVE-2025-21982
Published
Apr 1, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499.004
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Apr 1, 2025CVE publishedPublication date reported by the CVE source.
  2. May 11, 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=acf4884a571709cad99f98aabe08b7cacd62dc80 <6a08a86e5aff8e65368ccd463348fdda26100821
  3. Affected versionversion=acf4884a571709cad99f98aabe08b7cacd62dc80 <a585f6ea42ec259a9a57e3e2580fa527c92187d0
  4. Affected versionversion=acf4884a571709cad99f98aabe08b7cacd62dc80 <acf40ab42799e4ae1397ee6f5c5941092d66f999

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=6.7; version=acf4884a571709cad99f98aabe08b7cacd62dc80 <6a08a86e5aff8e65368ccd463348fdda26100821; version=acf4884a571709cad99f98aabe08b7cacd62dc80 <a585f6ea42ec259a9a57e3e2580fa527c92187d0; version=acf4884a571709cad99f98aabe08b7cacd62dc80 <acf40ab42799e4ae1397ee6f5c5941092d66f999

Published CVSS scores

5.5SUSECVSS: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
6.8SUSECVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
5.5NIST NVDCVSS: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

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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
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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