CVE-2026-72090

Cross-client debug buffer sync via client confusion

Published Aug 15, 2026 · Updated Aug 15, 2026

Client-context confusion in Linux 6.19 allows local users to synchronize an amdxdna debug BO against the wrong context namespace. amdxdna_drm_sync_bo_ioctl() resolves the supplied handle in the caller's drm_file but passes the buffer object's stored client to amdxdna_hwctx_sync_debug_bo(). Reachability requires local access to an AMD NPU device and a SYNC_DIRECT_FROM_DEVICE request; the published record does not specify the resulting security consequence.

CVSS severity7.8
High
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Client-context confusion in Linux 6.19 allows local users to synchronize an amdxdna debug BO against the wrong context namespace. amdxdna_drm_sync_bo_ioctl() resolves the supplied handle in the caller's drm_file but passes the buffer object's stored client to amdxdna_hwctx_sync_debug_bo(). Reachability requires local access to an AMD NPU device and a SYNC_DIRECT_FROM_DEVICE request; the published record does not specify the resulting security consequence.

The record

CVE
CVE-2026-72090
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
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=6.19
  2. Affected versionversion=7ea0468380216c10b73633b976d33efa8c12d375 <216e43d93dd49ec253052741aa476e51a8c54cd8
  3. Affected versionversion=7ea0468380216c10b73633b976d33efa8c12d375 <7caf2a2351d4053075670ff3e26a6815da0a9e1e

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.19; version=7ea0468380216c10b73633b976d33efa8c12d375 <216e43d93dd49ec253052741aa476e51a8c54cd8; version=7ea0468380216c10b73633b976d33efa8c12d375 <7caf2a2351d4053075670ff3e26a6815da0a9e1e

Published CVSS scores

3.6SUSECVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N
7.8Linux Kernel CNACVSS:3.1/AV:L/AC:L/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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

No sourced classifications are available.

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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