CVE-2026-89764Hinoki check available

Use-after-free via concurrent Devres revocation

Published Sep 11, 2026 · Updated Sep 11, 2026

A race in Linux 6.18 allows attackers to trigger a use-after-free through concurrent revocation of Rust Devres resources. The release callback calls Revocable::revoke while Devres::drop can call revoke_nosync on another CPU, and the losing revoker returns before drop_in_place finishes. The race requires concurrent resource teardown and can free adjacent backing sg_table data or pages while the winning revoker still references them.

CVSS severityUnavailable
Unscored
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

A race in Linux 6.18 allows attackers to trigger a use-after-free through concurrent revocation of Rust Devres resources. The release callback calls Revocable::revoke while Devres::drop can call revoke_nosync on another CPU, and the losing revoker returns before drop_in_place finishes. The race requires concurrent resource teardown and can free adjacent backing sg_table data or pages while the winning revoker still references them.

The record

CVE
CVE-2026-89764
Published
Sep 11, 2026
Updated
Sep 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
Unavailable
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 11, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 11, 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?

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  1. Affected versionversion=05aa6fb1c21d7fb9df735da24096d793223789d5 <acc516dfa1972d31836b50abc0115216cd0fccc5
  2. Affected versionversion=05aa6fb1c21d7fb9df735da24096d793223789d5 <c7e3d57c705ab1053a6a1bbef96795e792da1540
  3. Affected versionversion=6.18

What conditions does exploitation require?

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

What is affected?

The Linux Kernel Organization · Linuxversion=05aa6fb1c21d7fb9df735da24096d793223789d5 <acc516dfa1972d31836b50abc0115216cd0fccc5; version=05aa6fb1c21d7fb9df735da24096d793223789d5 <c7e3d57c705ab1053a6a1bbef96795e792da1540; version=6.18

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 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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