CVE-2026-53311

Local service interruption via uninitialized dentry time

Published Jun 26, 2026 · Updated Jun 26, 2026

Uninitialized-value use in Linux Kernel 6.16 through 6.18.33 and 6.19 through 7.0.9 allows local users to interrupt service via FUSE lookup. The lookup_open path can pass a newly allocated dentry from __d_alloc to fuse_dentry_revalidate before d_time has been initialized, and the revalidation function reads that value. Reaching the flaw requires local low-privileged access and a FUSE lookup path; the published consequence is limited to kernel availability.

CVSS severity5.5
Medium
EPSS probability0.11%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Uninitialized-value use in Linux Kernel 6.16 through 6.18.33 and 6.19 through 7.0.9 allows local users to interrupt service via FUSE lookup. The lookup_open path can pass a newly allocated dentry from __d_alloc to fuse_dentry_revalidate before d_time has been initialized, and the revalidation function reads that value. Reaching the flaw requires local low-privileged access and a FUSE lookup path; the published consequence is limited to kernel availability.

The record

CVE
CVE-2026-53311
Published
Jun 26, 2026
Updated
Jun 26, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-908, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 26, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 26, 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=2396356a945bb022aff02656f59c2a45d457043f <3ac9117ba3deab8a5dd22847355f861686f4bee7
  2. Affected versionversion=2396356a945bb022aff02656f59c2a45d457043f <5a6baf204610589f8a5b5a1cd69d1fe661d9d3cd
  3. Affected versionversion=2396356a945bb022aff02656f59c2a45d457043f <da3d241c5b925f17a9d8051d7a9e0d454d8e01f6
  4. Affected versionversion=6.16

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=2396356a945bb022aff02656f59c2a45d457043f <3ac9117ba3deab8a5dd22847355f861686f4bee7; version=2396356a945bb022aff02656f59c2a45d457043f <5a6baf204610589f8a5b5a1cd69d1fe661d9d3cd; version=2396356a945bb022aff02656f59c2a45d457043f <da3d241c5b925f17a9d8051d7a9e0d454d8e01f6; version=6.16

Published CVSS scores

5.5NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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.

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)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-908Use of Uninitialized Resource
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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