CVE-2026-23163

System crash via uninitialized interrupt ring dereference

Published Feb 14, 2026 · Updated Feb 14, 2026

NULL pointer dereference in the Linux Kernel allows local users to crash AMD APU systems during SVM page-fault recovery. The amdgpu_gmc_filter_faults_remove function reads the ih1 interrupt timestamp without checking whether the secondary ring was initialized, causing amdgpu_ih_decode_iv_ts_helper to dereference ih->ring[]. The path requires an affected Raven or Renoir-class APU with retry faults enabled; exploitation interrupts the host by crashing the kernel.

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

NULL pointer dereference in the Linux Kernel allows local users to crash AMD APU systems during SVM page-fault recovery. The amdgpu_gmc_filter_faults_remove function reads the ih1 interrupt timestamp without checking whether the secondary ring was initialized, causing amdgpu_ih_decode_iv_ts_helper to dereference ih->ring[]. The path requires an affected Raven or Renoir-class APU with retry faults enabled; exploitation interrupts the host by crashing the kernel.

The record

CVE
CVE-2026-23163
Published
Feb 14, 2026
Updated
Feb 14, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-476, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 14, 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=6.4
  2. Affected versionversion=dd299441654fd8209056c7985ddf2373ebaba6ed <7611d7faccc1218be477671f892a89b25c0cb352
  3. Affected versionversion=dd299441654fd8209056c7985ddf2373ebaba6ed <8b1ecc9377bc641533cd9e76dfa3aee3cd04a007
  4. Affected versionversion=dd299441654fd8209056c7985ddf2373ebaba6ed <ac251d17d8af58ddc3daba65eaf0a99e63dc4284
  5. Affected versionversion=dd299441654fd8209056c7985ddf2373ebaba6ed <c74e2dbb5316898fb2113a8ea3a93b27698dbf68

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=6.4; version=dd299441654fd8209056c7985ddf2373ebaba6ed <7611d7faccc1218be477671f892a89b25c0cb352; version=dd299441654fd8209056c7985ddf2373ebaba6ed <8b1ecc9377bc641533cd9e76dfa3aee3cd04a007; version=dd299441654fd8209056c7985ddf2373ebaba6ed <ac251d17d8af58ddc3daba65eaf0a99e63dc4284; version=dd299441654fd8209056c7985ddf2373ebaba6ed <c74e2dbb5316898fb2113a8ea3a93b27698dbf68

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
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.

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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