CVE-2026-93233Hinoki check available

Device-memory leak via split-folio counter underflow

Published Sep 24, 2026 · Updated Sep 24, 2026

Improper resource accounting in Linux 6.19 allows attackers to prevent Nouveau device-memory chunks from being reclaimed after folio splits. nouveau_dmem_folio_split updates sub-folio metadata but fails to increment chunk->callocated, while nouveau_dmem_folio_free decrements it for every resulting sub-folio. The affected path requires Nouveau device-private large folios to be split and later freed; no direct security-boundary impact has been published.

CVSS severityUnavailable
Unscored
EPSS probability0.15%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Improper resource accounting in Linux 6.19 allows attackers to prevent Nouveau device-memory chunks from being reclaimed after folio splits. nouveau_dmem_folio_split updates sub-folio metadata but fails to increment chunk->callocated, while nouveau_dmem_folio_free decrements it for every resulting sub-folio. The affected path requires Nouveau device-private large folios to be split and later freed; no direct security-boundary impact has been published.

The record

CVE
CVE-2026-93233
Published
Sep 24, 2026
Updated
Sep 24, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 24, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 24, 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=c3228747107705d47c7e9a03598a434a0380cb73 <0163b92946d0a7c816f619c57a4d9867954dd106
  3. Affected versionversion=c3228747107705d47c7e9a03598a434a0380cb73 <c2256c044a1df39c8aad4dd2d6f709b2533e2d7a

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=6.19; version=c3228747107705d47c7e9a03598a434a0380cb73 <0163b92946d0a7c816f619c57a4d9867954dd106; version=c3228747107705d47c7e9a03598a434a0380cb73 <c2256c044a1df39c8aad4dd2d6f709b2533e2d7a

Published CVSS scores

No CVSS assessment is available in this record.

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.

Activity data is delayed. The latest report is Sep 28, 2026.

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

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
VectorUnavailable
PrivilegesUnavailable
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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