CVE-2026-74440

Unauthorized GPU memory access via omitted buffer fences

Published Aug 15, 2026 · Updated Aug 15, 2026

Race condition in Linux 6.8 and affected later branches allows local users to read or write GPU buffer memory during execution. xe_exec_ioctl() adds only the VM dma-resv KERNEL slot as a dependency and omits those slots for external buffer objects, allowing a user job to run while those buffers are moved or evicted. Reachability requires local access to an Xe DRM execution context with an external buffer mapped into its VM while kernel memory-management work remains in flight.

CVSS severity7.0
High
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Race condition in Linux 6.8 and affected later branches allows local users to read or write GPU buffer memory during execution. xe_exec_ioctl() adds only the VM dma-resv KERNEL slot as a dependency and omits those slots for external buffer objects, allowing a user job to run while those buffers are moved or evicted. Reachability requires local access to an Xe DRM execution context with an external buffer mapped into its VM while kernel memory-management work remains in flight.

The record

CVE
CVE-2026-74440
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-362
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 15, 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=6.8
  2. Affected versionversion=dd08ebf6c3525a7ea2186e636df064ea47281987 <1738db550334adca0e7fcf0ef684198fb7462779
  3. Affected versionversion=dd08ebf6c3525a7ea2186e636df064ea47281987 <21976fe5258494ac38b63d103be81bf1180ae4ae
  4. Affected versionversion=dd08ebf6c3525a7ea2186e636df064ea47281987 <5d363d00bc9799b90a0dc89eb1c5dcb909c042ee
  5. Affected versionversion=dd08ebf6c3525a7ea2186e636df064ea47281987 <af80e2bfde9312c76b60cf9274248dce0410b30d

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.8; version=dd08ebf6c3525a7ea2186e636df064ea47281987 <1738db550334adca0e7fcf0ef684198fb7462779; version=dd08ebf6c3525a7ea2186e636df064ea47281987 <21976fe5258494ac38b63d103be81bf1180ae4ae; version=dd08ebf6c3525a7ea2186e636df064ea47281987 <5d363d00bc9799b90a0dc89eb1c5dcb909c042ee; version=dd08ebf6c3525a7ea2186e636df064ea47281987 <af80e2bfde9312c76b60cf9274248dce0410b30d

Published CVSS scores

7.0Oracle LinuxCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/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-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

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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