CVE-2026-89800

Persistent GPU bind denial via uncleared dirty flag

Published Sep 16, 2026 · Updated Sep 16, 2026

Denial of service in Linux 6.6 and later allows local users to permanently block later Nouveau VM binds through a failed sparse unmap. The OP_UNMAP_SPARSE unwind path reinserts the region but fails to clear reg->dirty, while clearing op->reg causes cleanup to skip teardown and signaling. An unprivileged render-node client must submit a later-failing multi-operation VM_BIND job; the resulting failures or unkillable wait persist for that UVMM's lifetime.

CVSS severityUnavailable
Unscored
EPSS probabilityUnavailable
No score available in this record
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

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Summary

What happened

Denial of service in Linux 6.6 and later allows local users to permanently block later Nouveau VM binds through a failed sparse unmap. The OP_UNMAP_SPARSE unwind path reinserts the region but fails to clear reg->dirty, while clearing op->reg causes cleanup to skip teardown and signaling. An unprivileged render-node client must submit a later-failing multi-operation VM_BIND job; the resulting failures or unkillable wait persist for that UVMM's lifetime.

The record

CVE
CVE-2026-89800
Published
Sep 16, 2026
Updated
Sep 16, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 16, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 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=6.6
  2. Affected versionversion=b88baab828713ce0b49b185444b2ee83bed373a8 <1101cbfe7f342e5eaaf7444965d4f1215abdac4c
  3. Affected versionversion=b88baab828713ce0b49b185444b2ee83bed373a8 <196ce9e5e93202da097062be24e404984dbc5ac2
  4. Affected versionversion=b88baab828713ce0b49b185444b2ee83bed373a8 <38a62306c4266bcb3cd89e33c7111ee33096ebb3
  5. Affected versionversion=b88baab828713ce0b49b185444b2ee83bed373a8 <a129b2b875c148aba233ace8447a0c36ca3bae07
  6. Affected versionversion=b88baab828713ce0b49b185444b2ee83bed373a8 <c60033c172420179b7bbb3d1f843f8dc90164dc5

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=6.6; version=b88baab828713ce0b49b185444b2ee83bed373a8 <1101cbfe7f342e5eaaf7444965d4f1215abdac4c; version=b88baab828713ce0b49b185444b2ee83bed373a8 <196ce9e5e93202da097062be24e404984dbc5ac2; version=b88baab828713ce0b49b185444b2ee83bed373a8 <38a62306c4266bcb3cd89e33c7111ee33096ebb3; version=b88baab828713ce0b49b185444b2ee83bed373a8 <a129b2b875c148aba233ace8447a0c36ca3bae07; version=b88baab828713ce0b49b185444b2ee83bed373a8 <c60033c172420179b7bbb3d1f843f8dc90164dc5

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.

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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
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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