CVE-2026-68251

Kernel crash via misaligned AMDGPU fence offset

Published Aug 10, 2026 · Updated Aug 10, 2026

Reachable assertions in the Linux kernel's AMDGPU SDMA 6.0 driver allow local users with render-node access to crash the kernel. The sdma_v6_0_ring_emit_fence function applies BUG_ON to an unvalidated, user-controlled fence offset whose low bits survive address construction. A local process with an AMDGPU render-node file descriptor and SDMA 6.0 hardware can submit a misaligned fence address, causing an oops and a machine panic when panic-on-oops handling is enabled.

CVSS severity5.5
Medium
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reachable assertions in the Linux kernel's AMDGPU SDMA 6.0 driver allow local users with render-node access to crash the kernel. The sdma_v6_0_ring_emit_fence function applies BUG_ON to an unvalidated, user-controlled fence offset whose low bits survive address construction. A local process with an AMDGPU render-node file descriptor and SDMA 6.0 hardware can submit a misaligned fence address, causing an oops and a machine panic when panic-on-oops handling is enabled.

The record

CVE
CVE-2026-68251
Published
Aug 10, 2026
Updated
Aug 10, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-248, T1499.004
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=0 <6.12.101
  2. Affected versionversion=0 <6.18.42
  3. Affected versionversion=0 <6.6.148
  4. Affected versionversion=0 <7.1.6
  5. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <2eb06c88426b6c8de602c608959f3a56ac51861e
  6. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <51fd52087165180967cf7d5ee99badee7e172ea0
  7. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <9df8a7f09e305249872b536555793b28e77b7de9
  8. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e7f31c9a61533062a704f90b9f63064045249693
  9. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ec42c96c322e5cc48099ab5e67b5cbe236cb1949

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=0 <6.12.101; version=0 <6.18.42; version=0 <6.6.148; version=0 <7.1.6; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <2eb06c88426b6c8de602c608959f3a56ac51861e; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <51fd52087165180967cf7d5ee99badee7e172ea0; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <9df8a7f09e305249872b536555793b28e77b7de9; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e7f31c9a61533062a704f90b9f63064045249693; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <ec42c96c322e5cc48099ab5e67b5cbe236cb1949

Published CVSS scores

5.5OracleCVSS: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-248Uncaught Exception
T1499.004Endpoint Denial of Service: Application 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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