CVE-2026-74542

Netfs writeback disruption via allocation failure

Published Aug 15, 2026 · Updated Aug 15, 2026

Resource-allocation failure in Linux kernel netfs allows attackers to disrupt writeback via unspecified vectors. During writeback, folio_queue allocation can fail outside GFP_KERNEL context, but the rolling-buffer path lacks a reserved allocation pool and reaches the folio != NULL warning in netfs_writepages. The public record identifies no attacker-controlled trigger and does not establish whether the warning escalates to a crash, hang, or broader service interruption.

CVSS severityUnavailable
Unscored
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Resource-allocation failure in Linux kernel netfs allows attackers to disrupt writeback via unspecified vectors. During writeback, folio_queue allocation can fail outside GFP_KERNEL context, but the rolling-buffer path lacks a reserved allocation pool and reaches the folio != NULL warning in netfs_writepages. The public record identifies no attacker-controlled trigger and does not establish whether the warning escalates to a crash, hang, or broader service interruption.

The record

CVE
CVE-2026-74542
Published
Aug 15, 2026
Updated
Aug 15, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
Unavailable
Privileges
Unavailable

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=6.12
  2. Affected versionversion=cd0277ed0c188dd40e7744e89299af7b78831ca4 <1d78d56c43ef3768183e8370e7367b162700e049
  3. Affected versionversion=cd0277ed0c188dd40e7744e89299af7b78831ca4 <3f6d7f8a5416d852648d15a05e895f1195ee8a85

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesUnavailable in this record.

What is affected?

The Linux Kernel Organization · Linuxversion=6.12; version=cd0277ed0c188dd40e7744e89299af7b78831ca4 <1d78d56c43ef3768183e8370e7367b162700e049; version=cd0277ed0c188dd40e7744e89299af7b78831ca4 <3f6d7f8a5416d852648d15a05e895f1195ee8a85

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.

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)
VectorUnavailable
PrivilegesUnavailable
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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