CVE-2026-68276

Local kernel crash via oversized IB fill

Published Aug 10, 2026 · Updated Aug 10, 2026

Out-of-bounds write in the drm/amdgpu/gfx cleaner-shader sysfs path in Linux 6.12 allows local users to trigger a kernel page fault. The path allocates a 16-dword indirect buffer but fills align_mask plus one entries, writing 256 dwords when a GFX ring uses a 0xff mask. Reachability requires local access and an AMD GPU using the amdgpu GFX ring; successful triggering crashes the kernel rather than exposing data.

CVSS severity7.0
High
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

Out-of-bounds write in the drm/amdgpu/gfx cleaner-shader sysfs path in Linux 6.12 allows local users to trigger a kernel page fault. The path allocates a 16-dword indirect buffer but fills align_mask plus one entries, writing 256 dwords when a GFX ring uses a 0xff mask. Reachability requires local access and an AMD GPU using the amdgpu GFX ring; successful triggering crashes the kernel rather than exposing data.

The record

CVE
CVE-2026-68276
Published
Aug 10, 2026
Updated
Aug 10, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-787, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 10, 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=6.12
  2. Affected versionversion=d361ad5d2fc0e4d59d5d538092c9b37889756642 <201633f47b542a99bb7baafdfcda7781249fb3d9
  3. Affected versionversion=d361ad5d2fc0e4d59d5d538092c9b37889756642 <3e864bf2a32a1cbdf1e0f9c5a5a4176e8575f4a3
  4. Affected versionversion=d361ad5d2fc0e4d59d5d538092c9b37889756642 <9cd9a983769a4d0e9cc80a287316ee79685d38b3
  5. Affected versionversion=d361ad5d2fc0e4d59d5d538092c9b37889756642 <e28420e36542ae8b66a5bdcec419525f521bddf8

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.12; version=d361ad5d2fc0e4d59d5d538092c9b37889756642 <201633f47b542a99bb7baafdfcda7781249fb3d9; version=d361ad5d2fc0e4d59d5d538092c9b37889756642 <3e864bf2a32a1cbdf1e0f9c5a5a4176e8575f4a3; version=d361ad5d2fc0e4d59d5d538092c9b37889756642 <9cd9a983769a4d0e9cc80a287316ee79685d38b3; version=d361ad5d2fc0e4d59d5d538092c9b37889756642 <e28420e36542ae8b66a5bdcec419525f521bddf8

Published CVSS scores

7.0Red HatCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
5.1Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:L/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-787Out-of-bounds Write
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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