CVE-2026-46258

Local kernel crash via post-null debug dereference

Published Jun 3, 2026 · Updated Jun 3, 2026

NULL pointer dereference in Linux Kernel 6.19 through 6.19.3 allows local users to crash the system through the GPIO character device. In linehandle_create(), retain_and_null_ptr() clears lh before a later dev_dbg statement dereferences lh to print the requested line count. The path requires CAP_SYS_ADMIN to enable dynamic debug, which is disabled by default on Ubuntu; the reported consequence is a kernel crash.

CVSS severity5.5
Medium
EPSS probability0.10%
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 Linux Kernel 6.19 through 6.19.3 allows local users to crash the system through the GPIO character device. In linehandle_create(), retain_and_null_ptr() clears lh before a later dev_dbg statement dereferences lh to print the requested line count. The path requires CAP_SYS_ADMIN to enable dynamic debug, which is disabled by default on Ubuntu; the reported consequence is a kernel crash.

The record

CVE
CVE-2026-46258
Published
Jun 3, 2026
Updated
Jun 3, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-476, T1499.004
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Jun 3, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 3, 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=6.19
  2. Affected versionversion=da7e394bf58f94e9783379fef7c7fb4411b03208 <6af6be278e3ba2ffb6af5b796c89dfb3f5d9063e
  3. Affected versionversion=da7e394bf58f94e9783379fef7c7fb4411b03208 <87b9d7a4cfbed5f42af440372026270af997c766

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linux Kernelversion=6.19; version=da7e394bf58f94e9783379fef7c7fb4411b03208 <6af6be278e3ba2ffb6af5b796c89dfb3f5d9063e; version=da7e394bf58f94e9783379fef7c7fb4411b03208 <87b9d7a4cfbed5f42af440372026270af997c766

Published CVSS scores

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 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-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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