CVE-2026-68250

Local system crash via misaligned fence offset

Published Aug 10, 2026 · Updated Aug 10, 2026

Reachable assertions in Linux kernel 5.9 through 7.2-rc1 allow local users to crash systems through an AMDGPU command submission. The sdma_v5_2_ring_emit_fence() function applies BUG_ON() to the unvalidated low address bits of a user-selected fence offset, turning misalignment into a kernel panic. The path requires access to an AMDGPU SDMA 5.2 render node on supported AMD hardware; the consequence is an availability-only system crash.

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 Linux kernel 5.9 through 7.2-rc1 allow local users to crash systems through an AMDGPU command submission. The sdma_v5_2_ring_emit_fence() function applies BUG_ON() to the unvalidated low address bits of a user-selected fence offset, turning misalignment into a kernel panic. The path requires access to an AMDGPU SDMA 5.2 render node on supported AMD hardware; the consequence is an availability-only system crash.

The record

CVE
CVE-2026-68250
Published
Aug 10, 2026
Updated
Aug 10, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-617, 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 <01dfea84df919cfbec4064151d327480ae5c120d
  6. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <09da54636bac146c1a3c461c4e7eb08d355bb86e
  7. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <2051bbbfbd44ff51637b01a5a3dbee6630f90d57
  8. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b665c1845488c6cd869da3d31b5978015977f898
  9. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b9dd618a635d39fbb211454b6e8837b2a7f10fb0

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 <01dfea84df919cfbec4064151d327480ae5c120d; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <09da54636bac146c1a3c461c4e7eb08d355bb86e; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <2051bbbfbd44ff51637b01a5a3dbee6630f90d57; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b665c1845488c6cd869da3d31b5978015977f898; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b9dd618a635d39fbb211454b6e8837b2a7f10fb0

Published CVSS scores

5.5Red HatCVSS: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-617Reachable Assertion
T1499.004Application 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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