CVE-2026-72365

Data loss via uncollected asynchronous O_SYNC writes

Published Aug 15, 2026 · Updated Aug 15, 2026

Incorrect synchronization in Linux kernel netfs allows local users to disrupt writethrough collection with asynchronous O_SYNC writes. The writethrough path in fs/netfs/write_issue.c fails to set NETFS_RREQ_OFFLOAD_COLLECTION, so collection runs only at request completion and misses asynchronous O_SYNC writes. A local low-privileged user able to issue netfs O_SYNC writes can cause incomplete collection and associated data inconsistency or loss.

CVSS severity3.3
Low
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect synchronization in Linux kernel netfs allows local users to disrupt writethrough collection with asynchronous O_SYNC writes. The writethrough path in fs/netfs/write_issue.c fails to set NETFS_RREQ_OFFLOAD_COLLECTION, so collection runs only at request completion and misses asynchronous O_SYNC writes. A local low-privileged user able to issue netfs O_SYNC writes can cause incomplete collection and associated data inconsistency or loss.

The record

CVE
CVE-2026-72365
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-821
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 15, 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=288ace2f57c9d06dd2e42bd80d03747d879a4068 <0348e3fa0dfbf152af687e86ce079742b1860da9
  2. Affected versionversion=288ace2f57c9d06dd2e42bd80d03747d879a4068 <7838131e296dfbb639ea278901a53c018322c11e
  3. Affected versionversion=288ace2f57c9d06dd2e42bd80d03747d879a4068 <ba6a9f6533c77c628eef0c0c5c19cd316e2be1b4
  4. Affected versionversion=6.10

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=288ace2f57c9d06dd2e42bd80d03747d879a4068 <0348e3fa0dfbf152af687e86ce079742b1860da9; version=288ace2f57c9d06dd2e42bd80d03747d879a4068 <7838131e296dfbb639ea278901a53c018322c11e; version=288ace2f57c9d06dd2e42bd80d03747d879a4068 <ba6a9f6533c77c628eef0c0c5c19cd316e2be1b4; version=6.10

Published CVSS scores

3.3SUSECVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

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

CWE-821Incorrect Synchronization

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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