CVE-2026-23214

Service interruption via read-only Btrfs transactions

Published Feb 18, 2026 · Updated Feb 18, 2026

Improper transaction handling in Linux Kernel Btrfs allows local users to interrupt service via a heavily corrupted filesystem. During unmount, inode eviction can start a new transaction even though rescue mount options have made the filesystem fully read-only. Reaching the faulty path requires local privileges to mount the corrupted Btrfs filesystem with rescue options; the resulting transaction abort disrupts filesystem operations.

CVSS severity5.5
Medium
EPSS probability0.11%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper transaction handling in Linux Kernel Btrfs allows local users to interrupt service via a heavily corrupted filesystem. During unmount, inode eviction can start a new transaction even though rescue mount options have made the filesystem fully read-only. Reaching the faulty path requires local privileges to mount the corrupted Btrfs filesystem with rescue options; the resulting transaction abort disrupts filesystem operations.

The record

CVE
CVE-2026-23214
Published
Feb 18, 2026
Updated
Feb 18, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 18, 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=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1972f44c189c8aacde308fa9284e474c1a5cbd9f
  2. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <3228b2eceb6c3d7e237f8a5330113dbd164fb90d
  3. Affected versionversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <a928eecf030a9a5dc5f5ca98332699f379b91963

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <1972f44c189c8aacde308fa9284e474c1a5cbd9f; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <3228b2eceb6c3d7e237f8a5330113dbd164fb90d; version=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <a928eecf030a9a5dc5f5ca98332699f379b91963

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

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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