CVE-2026-43154

Folio reference leak via premature label returns

Published May 6, 2026 · Updated May 6, 2026

Resource leak in Linux Kernel EROFS 6.18 before 6.18.16 and 6.19 before 6.19.6 allows local users to leak folio references. In erofs_read_superblock(), volume-label handling takes premature return paths without releasing the held metadata buffer and its folio reference. Triggering the flaw requires local access and a crafted EROFS image with a valid volume label; the upstream record reports no crash or other severe effect.

CVSS severity5.5
Medium
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource leak in Linux Kernel EROFS 6.18 before 6.18.16 and 6.19 before 6.19.6 allows local users to leak folio references. In erofs_read_superblock(), volume-label handling takes premature return paths without releasing the held metadata buffer and its folio reference. Triggering the flaw requires local access and a crafted EROFS image with a valid volume label; the upstream record reports no crash or other severe effect.

The record

CVE
CVE-2026-43154
Published
May 6, 2026
Updated
May 6, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 6, 2026CVE publishedPublication date reported by the CVE source.
  2. May 6, 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=1cf12c7177410afcb53f815315d1247ea57fae4f <3afa4da38802a4cba1c23848a32284e7e57b831b
  2. Affected versionversion=1cf12c7177410afcb53f815315d1247ea57fae4f <8d8a878ef60801d867119b3df6a93e2982d62a71
  3. Affected versionversion=1cf12c7177410afcb53f815315d1247ea57fae4f <d498bd168494ad4a4bce16192bfb9ce04ca19c9a
  4. Affected versionversion=6.18

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=1cf12c7177410afcb53f815315d1247ea57fae4f <3afa4da38802a4cba1c23848a32284e7e57b831b; version=1cf12c7177410afcb53f815315d1247ea57fae4f <8d8a878ef60801d867119b3df6a93e2982d62a71; version=1cf12c7177410afcb53f815315d1247ea57fae4f <d498bd168494ad4a4bce16192bfb9ce04ca19c9a; version=6.18

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.

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

No sourced classifications are available.

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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