CVE-2026-23400

Local denial of service via Binder deadlock

Published Mar 29, 2026 · Updated Mar 29, 2026

Improper locking in Linux Kernel 6.18 allows local users to cause a deadlock through Rust Binder death-notification handling. dead_binder_done() retains the process lock while set_notification_done() can route work to a process queue that reacquires the same lock. The sequence requires low-privileged local access and a non-looper caller; normal Android userspace is not expected to meet that condition.

CVSS severity5.5
Medium
EPSS probability0.09%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper locking in Linux Kernel 6.18 allows local users to cause a deadlock through Rust Binder death-notification handling. dead_binder_done() retains the process lock while set_notification_done() can route work to a process queue that reacquires the same lock. The sequence requires low-privileged local access and a non-looper caller; normal Android userspace is not expected to meet that condition.

The record

CVE
CVE-2026-23400
Published
Mar 29, 2026
Updated
Mar 29, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-667, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 29, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 29, 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=6.18
  2. Affected versionversion=eafedbc7c050c44744fbdf80bdf3315e860b7513 <2e303f0febb65a434040774b793ba8356698802b
  3. Affected versionversion=eafedbc7c050c44744fbdf80bdf3315e860b7513 <3be72099067d2cd4a0e089696f19780f75b2b88a
  4. Affected versionversion=eafedbc7c050c44744fbdf80bdf3315e860b7513 <dd109e3442817bc03ad1f3ffd541092f8c428141

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=6.18; version=eafedbc7c050c44744fbdf80bdf3315e860b7513 <2e303f0febb65a434040774b793ba8356698802b; version=eafedbc7c050c44744fbdf80bdf3315e860b7513 <3be72099067d2cd4a0e089696f19780f75b2b88a; version=eafedbc7c050c44744fbdf80bdf3315e860b7513 <dd109e3442817bc03ad1f3ffd541092f8c428141

Published CVSS scores

5.5NIST National Vulnerability DatabaseCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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-667Improper Locking
T1499.004Application or System Exploitation

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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