CVE-2026-97534Hinoki check available

Service interruption via F2FS free-section miscount

Published Sep 25, 2026 · Updated Sep 25, 2026

Denial of service in Linux 5.8 and affected git revisions allows local users to disrupt F2FS resizing under low-space conditions. free_segment_range reduces MAIN_SECS but leaves already-free truncated sections in free_sections, overstating allocatable space during garbage collection. Reaching the defect requires privileged resizing of an F2FS filesystem with free sections in the truncated range; the result is allocation failure or an assertion.

CVSS severityUnavailable
Unscored
EPSS probability0.20%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Denial of service in Linux 5.8 and affected git revisions allows local users to disrupt F2FS resizing under low-space conditions. free_segment_range reduces MAIN_SECS but leaves already-free truncated sections in free_sections, overstating allocatable space during garbage collection. Reaching the defect requires privileged resizing of an F2FS filesystem with free sections in the truncated range; the result is allocation failure or an assertion.

The record

CVE
CVE-2026-97534
Published
Sep 25, 2026
Updated
Sep 25, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
admin

Timeline

How it unfolded

  1. Sep 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 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=5.8
  2. Affected versionversion=b4b10061ef98c583bcf82a4200703fbaa98c18dc <8a123a10770d2132d046748f20f02baa8d5539a1
  3. Affected versionversion=b4b10061ef98c583bcf82a4200703fbaa98c18dc <8c963d1738fdca400082ff5f9d99e083de4f4e70
  4. Affected versionversion=b4b10061ef98c583bcf82a4200703fbaa98c18dc <ca31116fad0954c61a0d38163cc51c48e4981b75

What conditions does exploitation require?

Attack vectorlocal
Required privilegesadmin

What is affected?

The Linux Kernel Organization · Linuxversion=5.8; version=b4b10061ef98c583bcf82a4200703fbaa98c18dc <8a123a10770d2132d046748f20f02baa8d5539a1; version=b4b10061ef98c583bcf82a4200703fbaa98c18dc <8c963d1738fdca400082ff5f9d99e083de4f4e70; version=b4b10061ef98c583bcf82a4200703fbaa98c18dc <ca31116fad0954c61a0d38163cc51c48e4981b75

Published CVSS scores

No CVSS assessment is available in this record.

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.

Activity data is delayed. The latest report is Sep 28, 2026.

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

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesadmin
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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