CVE-2026-89829Hinoki check available

Filesystem checkpoint stoppage via wrong footer index

Published Sep 16, 2026 · Updated Sep 16, 2026

Improper validation in affected Linux F2FS versions allows attackers to stop filesystem checkpoints via unspecified vectors. __write_node_folio passes a node ID instead of the folio index to f2fs_sanity_check_node_footer, causing a valid footer to be treated as corrupt and checkpointing to stop. A mounted F2FS volume and node-page writeback are required; published sources do not establish attacker control of that path, data corruption, or code execution.

CVSS severityUnavailable
Unscored
EPSS probabilityUnavailable
No score available in this record
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Improper validation in affected Linux F2FS versions allows attackers to stop filesystem checkpoints via unspecified vectors. __write_node_folio passes a node ID instead of the folio index to f2fs_sanity_check_node_footer, causing a valid footer to be treated as corrupt and checkpointing to stop. A mounted F2FS volume and node-page writeback are required; published sources do not establish attacker control of that path, data corruption, or code execution.

The record

CVE
CVE-2026-89829
Published
Sep 16, 2026
Updated
Sep 16, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Sep 16, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 16, 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=0a736109c9d29de0c26567e42cb99b27861aa8ba <0b196c07407f48a41cd9741cf53e10cb1e23d2e5
  2. Affected versionversion=0a736109c9d29de0c26567e42cb99b27861aa8ba <7e188e9f9437ab47c3237d609f1b26348d6fea1a
  3. Affected versionversion=6.18.13 <6.18.51
  4. Affected versionversion=6.19.3 <6.20
  5. Affected versionversion=7.0
  6. Affected versionversion=971aa8e2a4043d92bf62061b79f74fd4ac59165a
  7. Affected versionversion=cd2fec912a0f04390d446ed692f73f2da842855f <a984446aa9d5b787afa3023fc7b44017b80fe3bc

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=0a736109c9d29de0c26567e42cb99b27861aa8ba <0b196c07407f48a41cd9741cf53e10cb1e23d2e5; version=0a736109c9d29de0c26567e42cb99b27861aa8ba <7e188e9f9437ab47c3237d609f1b26348d6fea1a; version=6.18.13 <6.18.51; version=6.19.3 <6.20; version=7.0; version=971aa8e2a4043d92bf62061b79f74fd4ac59165a; version=cd2fec912a0f04390d446ed692f73f2da842855f <a984446aa9d5b787afa3023fc7b44017b80fe3bc

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.

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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
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Endpoint Denial of Service: Application or System Exploitation

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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