CVE-2026-68246

Kernel crash via fatal gfx11 assertions

Published Aug 10, 2026 · Updated Aug 10, 2026

Denial of service in Linux kernel branches before 6.6.148, 6.12.101, 6.18.42, and 7.1.6 allows local users to crash the kernel. The affected gfx11 ring-emission paths invoke BUG_ON for misaligned GPU addresses and an unexpected 64-bit KIQ fence flag, turning recoverable states into fatal kernel assertions. Reachability requires local low-privileged access and an AMD GPU using the gfx11 driver; the bounded consequence is a host crash.

CVSS severity5.5
Medium
EPSS probability0.17%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Linux kernel branches before 6.6.148, 6.12.101, 6.18.42, and 7.1.6 allows local users to crash the kernel. The affected gfx11 ring-emission paths invoke BUG_ON for misaligned GPU addresses and an unexpected 64-bit KIQ fence flag, turning recoverable states into fatal kernel assertions. Reachability requires local low-privileged access and an AMD GPU using the gfx11 driver; the bounded consequence is a host crash.

The record

CVE
CVE-2026-68246
Published
Aug 10, 2026
Updated
Aug 10, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
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 <0eebcab1ea2a77f086a04108f386f82ee3496022
  6. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <625f301e01bf89694466fdaa1f9904e2c62eb8f2
  7. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <7aeef42b657d930f3b639220e62120ac1bf058a1
  8. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <96b6d68f2b5a208e4d8f1e4a932ec424655e1267
  9. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <dfd9bf09fd8fe81f113a5c7e88bfd99f2499542f

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 <0eebcab1ea2a77f086a04108f386f82ee3496022; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <625f301e01bf89694466fdaa1f9904e2c62eb8f2; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <7aeef42b657d930f3b639220e62120ac1bf058a1; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <96b6d68f2b5a208e4d8f1e4a932ec424655e1267; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <dfd9bf09fd8fe81f113a5c7e88bfd99f2499542f

Published CVSS scores

5.5Oracle LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
4.7Amazon LinuxCVSS:3.1/AV:L/AC:H/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

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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

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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