CVE-2026-23153

Local service interruption via unlocked FireWire transaction list

Published Feb 14, 2026 · Updated Feb 14, 2026

Race condition in the FireWire core of Linux Kernel 6.18 through 6.18.8 allows local users to interrupt service through concurrent transactions. AR-response handling enumerates the transaction list without the card lock while AT-completion handling can modify that shared list concurrently. Triggering requires low-privileged local access and concurrent event processing; the published record identifies availability loss but does not distinguish a hang from a crash.

CVSS severity4.7
Medium
EPSS probability0.08%
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 FireWire core of Linux Kernel 6.18 through 6.18.8 allows local users to interrupt service through concurrent transactions. AR-response handling enumerates the transaction list without the card lock while AT-completion handling can modify that shared list concurrently. Triggering requires low-privileged local access and concurrent event processing; the published record identifies availability loss but does not distinguish a hang from a crash.

The record

CVE
CVE-2026-23153
Published
Feb 14, 2026
Updated
Feb 14, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-362
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 14, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 14, 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=b5725cfa4120a4d234ab112aad151d731531d093 <20e01bba2ae4898ce65cdcacd1bd6bec5111abd9
  3. Affected versionversion=b5725cfa4120a4d234ab112aad151d731531d093 <b038874e31fc3caa0b0d5abd259dd54b918ad4a1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=6.18; version=b5725cfa4120a4d234ab112aad151d731531d093 <20e01bba2ae4898ce65cdcacd1bd6bec5111abd9; version=b5725cfa4120a4d234ab112aad151d731531d093 <b038874e31fc3caa0b0d5abd259dd54b918ad4a1

Published CVSS scores

4.7NIST NVDCVSS:3.1/AV:L/AC:H/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

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-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

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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