CVE-2026-23292

Kernel work deadlock via recursive semaphore acquisition

Published Mar 25, 2026 · Updated Mar 25, 2026

Recursive locking in the Linux Kernel SCSI target configfs code allows local users to deadlock kernel work via a self-referential dbroot path. target_core_item_dbroot_store() validates the supplied path with filp_open(), which re-enters __configfs_open_file() and reacquires the same frag_sem held by flush_write_buffer(). A low-privileged local user must be able to write the target dbroot configfs attribute; successful triggering blocks affected kernel work and interrupts service.

CVSS severity5.5
Medium
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Recursive locking in the Linux Kernel SCSI target configfs code allows local users to deadlock kernel work via a self-referential dbroot path. target_core_item_dbroot_store() validates the supplied path with filp_open(), which re-enters __configfs_open_file() and reacquires the same frag_sem held by flush_write_buffer(). A low-privileged local user must be able to write the target dbroot configfs attribute; successful triggering blocks affected kernel work and interrupts service.

The record

CVE
CVE-2026-23292
Published
Mar 25, 2026
Updated
Mar 25, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-674, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 25, 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=09e21253d17f53bdb5aac0e0dbd057a29fcbe8d1
  2. Affected versionversion=0dfc45be875a378c2a3a4d6ed8e668ec8eb75073
  3. Affected versionversion=49824b5c875087a52672b0c8e8ecbefe6f773532
  4. Affected versionversion=5.3
  5. Affected versionversion=b0841eefd9693827afb9888235e26ddd098f9cef <142eacb50fb903a4c10dee7e67b6e79ebb36a582
  6. Affected versionversion=b0841eefd9693827afb9888235e26ddd098f9cef <14d4ac19d1895397532eec407433c5d74d9da53b
  7. Affected versionversion=b0841eefd9693827afb9888235e26ddd098f9cef <3161ef61f121d4573cad5b57c92188dcd9b284b3
  8. Affected versionversion=b0841eefd9693827afb9888235e26ddd098f9cef <4fcfa424a581d823cb1a9676e3eefe6ca17e453a
  9. Affected versionversion=b0841eefd9693827afb9888235e26ddd098f9cef <9a5641024fbfd9b24fe65984ad85fea10a3ae438
  10. Affected versionversion=b0841eefd9693827afb9888235e26ddd098f9cef <e8ef82cb6443d5f3260b1b830e17f03dda4229ea

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=09e21253d17f53bdb5aac0e0dbd057a29fcbe8d1; version=0dfc45be875a378c2a3a4d6ed8e668ec8eb75073; version=49824b5c875087a52672b0c8e8ecbefe6f773532; version=5.3; version=b0841eefd9693827afb9888235e26ddd098f9cef <142eacb50fb903a4c10dee7e67b6e79ebb36a582; version=b0841eefd9693827afb9888235e26ddd098f9cef <14d4ac19d1895397532eec407433c5d74d9da53b; version=b0841eefd9693827afb9888235e26ddd098f9cef <3161ef61f121d4573cad5b57c92188dcd9b284b3; version=b0841eefd9693827afb9888235e26ddd098f9cef <4fcfa424a581d823cb1a9676e3eefe6ca17e453a; version=b0841eefd9693827afb9888235e26ddd098f9cef <9a5641024fbfd9b24fe65984ad85fea10a3ae438; version=b0841eefd9693827afb9888235e26ddd098f9cef <e8ef82cb6443d5f3260b1b830e17f03dda4229ea

Published CVSS scores

5.5NIST NVDCVSS: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-674Uncontrolled Recursion
T1499Endpoint Denial of Service

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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