CVE-2026-53174

Directory enumeration disruption via truncated cache pointer

Published Jun 25, 2026 · Updated Jun 25, 2026

Incorrect error handling in Linux Kernel 6.19 through 7.0.12 and 7.1 release candidates allows local users to disrupt overlayfs directory reads. ovl_iterate_merged() assigns PTR_ERR(cache) before checking IS_ERR(cache), so successful ovl_cache_get() leaves err holding a truncated cache pointer that can be returned as a bogus nonzero error. The path requires low-privileged local access and an overlay-on-overlay directory read; the documented consequence is an erroneous read result rather than a published code-execution primitive.

CVSS severity7.8
High
EPSS probability0.12%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect error handling in Linux Kernel 6.19 through 7.0.12 and 7.1 release candidates allows local users to disrupt overlayfs directory reads. ovl_iterate_merged() assigns PTR_ERR(cache) before checking IS_ERR(cache), so successful ovl_cache_get() leaves err holding a truncated cache pointer that can be returned as a bogus nonzero error. The path requires low-privileged local access and an overlay-on-overlay directory read; the documented consequence is an erroneous read result rather than a published code-execution primitive.

The record

CVE
CVE-2026-53174
Published
Jun 25, 2026
Updated
Jun 25, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 25, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 25, 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=6.19
  2. Affected versionversion=d25e4b739f8378419f990983f2542160e79738c5 <1711b6ed6953cee5940ca4c3a6e77f1b3798cee2
  3. Affected versionversion=d25e4b739f8378419f990983f2542160e79738c5 <e7051909a01bfb883bfa78b27514854068ac4b85

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=6.19; version=d25e4b739f8378419f990983f2542160e79738c5 <1711b6ed6953cee5940ca4c3a6e77f1b3798cee2; version=d25e4b739f8378419f990983f2542160e79738c5 <e7051909a01bfb883bfa78b27514854068ac4b85

Published CVSS scores

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.

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

T1499Endpoint Denial of Service

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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