CVE-2026-46245

Local kernel crash via HPD NULL dereference

Published Jun 3, 2026 · Updated Jun 3, 2026

NULL pointer dereference in Linux Kernel 4.15 through 6.19.3 allows local users to crash the kernel during AMD display HPD initialization. The amdgpu_dm_hpd_init function reads dc_link for polling, then unconditionally dereferences dc_link->irq_source_hpd while registering HPD interrupts even when that connector has no valid link object. Reachability requires local low-privileged access and an AMD display connector lacking a valid dc_link during HPD setup.

CVSS severity5.5
Medium
EPSS probability0.11%
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 4.15 through 6.19.3 allows local users to crash the kernel during AMD display HPD initialization. The amdgpu_dm_hpd_init function reads dc_link for polling, then unconditionally dereferences dc_link->irq_source_hpd while registering HPD interrupts even when that connector has no valid link object. Reachability requires local low-privileged access and an AMD display connector lacking a valid dc_link during HPD setup.

The record

CVE
CVE-2026-46245
Published
Jun 3, 2026
Updated
Jun 3, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-476, T1499
Attack vector
local
Privileges
authenticated

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=4.15
  2. Affected versionversion=4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c <226a40c06a183abaeb7529a4f54d6c203bd14407
  3. Affected versionversion=4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c <a490e4d3c9fed1e690c8de348416eea3a9f054ff

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=4.15; version=4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c <226a40c06a183abaeb7529a4f54d6c203bd14407; version=4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c <a490e4d3c9fed1e690c8de348416eea3a9f054ff

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 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-476NULL Pointer Dereference
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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