CVE-2024-38626

Local denial of service via stale request flag

Published Jun 21, 2024 · Updated Aug 5, 2026

Denial of service in Linux kernel FUSE 6.9 through 6.9.3 allows local users to crash the kernel via a crafted resend sequence. When FUSE_NOTIFY_RESEND returns an INIT request to the pending list, fuse_resend fails to clear FR_SENT, so a later failed copy ends the request in an invalid state. Exploitation requires local FUSE-device access and a faulting read buffer; the resulting warning crashes systems configured to panic on warnings.

CVSS severity7.8
High
EPSS probability0.20%
Next 30 days · Sep 17, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in Linux kernel FUSE 6.9 through 6.9.3 allows local users to crash the kernel via a crafted resend sequence. When FUSE_NOTIFY_RESEND returns an INIT request to the pending list, fuse_resend fails to clear FR_SENT, so a later failed copy ends the request in an invalid state. Exploitation requires local FUSE-device access and a faulting read buffer; the resulting warning crashes systems configured to panic on warnings.

The record

CVE
CVE-2024-38626
Published
Jun 21, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 21, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 5, 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=6.9
  2. Affected versionversion=760eac73f9f69aa28fcb3050b4946c2dcc656d12 <246014876d782bbf2e652267482cd2e799fb5fcd
  3. Affected versionversion=760eac73f9f69aa28fcb3050b4946c2dcc656d12 <533070db659a9589310a743e9de14cf9d651ffaf

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.9; version=760eac73f9f69aa28fcb3050b4946c2dcc656d12 <246014876d782bbf2e652267482cd2e799fb5fcd; version=760eac73f9f69aa28fcb3050b4946c2dcc656d12 <533070db659a9589310a743e9de14cf9d651ffaf

Published CVSS scores

5.5SUSECVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5UbuntuCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
7.8Linux Kernel CNACVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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.

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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

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

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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