CVE-2025-22093

Kernel crash via unchecked DMUB service pointer

Published Apr 16, 2025 · Updated May 23, 2026

NULL pointer dereference in AMD display support in affected Linux kernel releases allows local users to crash the kernel through cursor updates. should_use_dmub_lock returns true without confirming ctx->dmub_srv exists on ASICs lacking DMUB, so dmub_hw_lock_mgr_cmd dereferences the null pointer. A low-privileged user with access to AMD DRM cursor ioctls can trigger a kernel oops that interrupts the host.

CVSS severity5.5
Medium
EPSS probability0.20%
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 AMD display support in affected Linux kernel releases allows local users to crash the kernel through cursor updates. should_use_dmub_lock returns true without confirming ctx->dmub_srv exists on ASICs lacking DMUB, so dmub_hw_lock_mgr_cmd dereferences the null pointer. A low-privileged user with access to AMD DRM cursor ioctls can trigger a kernel oops that interrupts the host.

The record

CVE
CVE-2025-22093
Published
Apr 16, 2025
Updated
May 23, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 16, 2025CVE publishedPublication date reported by the CVE source.
  2. May 23, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=4b46fc30b37e457d25cf3908c0c4dc3fbedd2044 <3453bcaf2ca92659346bf8504c2b52b3993fbd79
  2. Affected versionversion=6.1.128 <6.1.134
  3. Affected versionversion=6.12.12 <6.12.23
  4. Affected versionversion=6.13
  5. Affected versionversion=6.6.75 <6.6.87
  6. Affected versionversion=758abba3dd413dc5de2016f8588403294263a30a <b3a93a2407ad23c8d5bacabaf7cecbb4c6cdd461
  7. Affected versionversion=b5c764d6ed556c4e81fbe3fd976da77ec450c08e <35ad39afd007eddf34b3307bebb715c26891cc96
  8. Affected versionversion=b5c764d6ed556c4e81fbe3fd976da77ec450c08e <42d9d7bed270247f134190ba0cb05bbd072f58c2
  9. Affected versionversion=b5c764d6ed556c4e81fbe3fd976da77ec450c08e <5e4b1e04740cdb28de189285007366d99a92f1ce
  10. Affected versionversion=b7d2461858ac75c9d6bc4ab8af1a738d0814b716 <d953e2cd59ab466569c6f9da460e01caf1c83559

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4b46fc30b37e457d25cf3908c0c4dc3fbedd2044 <3453bcaf2ca92659346bf8504c2b52b3993fbd79; version=6.1.128 <6.1.134; version=6.12.12 <6.12.23; version=6.13; version=6.6.75 <6.6.87; version=758abba3dd413dc5de2016f8588403294263a30a <b3a93a2407ad23c8d5bacabaf7cecbb4c6cdd461; version=b5c764d6ed556c4e81fbe3fd976da77ec450c08e <35ad39afd007eddf34b3307bebb715c26891cc96; version=b5c764d6ed556c4e81fbe3fd976da77ec450c08e <42d9d7bed270247f134190ba0cb05bbd072f58c2; version=b5c764d6ed556c4e81fbe3fd976da77ec450c08e <5e4b1e04740cdb28de189285007366d99a92f1ce; version=b7d2461858ac75c9d6bc4ab8af1a738d0814b716 <d953e2cd59ab466569c6f9da460e01caf1c83559

Published CVSS scores

5.5Canonical UbuntuCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5Oracle LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5Amazon LinuxCVSS: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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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