CVE-2026-46095

Local service interruption via premature state transition

Published May 27, 2026 · Updated May 27, 2026

Race condition in the md-llbitmap subsystem of Linux Kernel allows local users to interrupt service through write or discard activity. The llbitmap_start_write() and llbitmap_start_discard() paths called llbitmap_state_machine() before raising their barrier, allowing the state machine to complete first. Reachability requires low-privileged local access and md-llbitmap activity; the documented consequence is availability loss only.

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

Race condition in the md-llbitmap subsystem of Linux Kernel allows local users to interrupt service through write or discard activity. The llbitmap_start_write() and llbitmap_start_discard() paths called llbitmap_state_machine() before raising their barrier, allowing the state machine to complete first. Reachability requires low-privileged local access and md-llbitmap activity; the documented consequence is availability loss only.

The record

CVE
CVE-2026-46095
Published
May 27, 2026
Updated
May 27, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 27, 2026CVE publishedPublication date reported by the CVE source.
  2. May 27, 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=5ab829f1971dc99f2aac10846c378e67fc875abc <9142f00a9287ca38152717e3e88a033a27774e7f
  2. Affected versionversion=5ab829f1971dc99f2aac10846c378e67fc875abc <9701d51dd378380ba05293fa391e8ba01065ae8d
  3. Affected versionversion=5ab829f1971dc99f2aac10846c378e67fc875abc <ef4ca3d4bf09716cff9ba00eb0351deadc8417ab
  4. Affected versionversion=6.18

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=5ab829f1971dc99f2aac10846c378e67fc875abc <9142f00a9287ca38152717e3e88a033a27774e7f; version=5ab829f1971dc99f2aac10846c378e67fc875abc <9701d51dd378380ba05293fa391e8ba01065ae8d; version=5ab829f1971dc99f2aac10846c378e67fc875abc <ef4ca3d4bf09716cff9ba00eb0351deadc8417ab; version=6.18

Published CVSS scores

5.5NVDCVSS: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

T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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