CVE-2024-56570

OverlayFS errors via unchecked directory lookup

Published Dec 27, 2024 · Updated May 11, 2026

Improper inode validation in Linux allows local users to trigger OverlayFS errors through malformed lower-layer directories. The ovl_dentry_weird function fails to reject directory inodes whose inode-operations table lacks a lookup callback before they enter the OverlayFS lower stack. NVD scores the flaw for local low-privileged access, but upstream material does not specify the required filesystem setup or exact error outcome.

CVSS severity7.8
High
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper inode validation in Linux allows local users to trigger OverlayFS errors through malformed lower-layer directories. The ovl_dentry_weird function fails to reject directory inodes whose inode-operations table lacks a lookup callback before they enter the OverlayFS lower stack. NVD scores the flaw for local low-privileged access, but upstream material does not specify the required filesystem setup or exact error outcome.

The record

CVE
CVE-2024-56570
Published
Dec 27, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
Unavailable
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 27, 2024CVE publishedPublication date reported by the CVE source.
  2. May 11, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3.18
  2. Affected versionversion=e9be9d5e76e34872f0c37d72e25bc27fe9e2c54c <065bf5dd21639f80e68450de16bda829784dbb8c
  3. Affected versionversion=e9be9d5e76e34872f0c37d72e25bc27fe9e2c54c <5f86e79c0b2287ffdabe6c1b305a36c4e0f40fe3
  4. Affected versionversion=e9be9d5e76e34872f0c37d72e25bc27fe9e2c54c <72014e7745cc8250bb8f27bd78694dfd3f1b5773
  5. Affected versionversion=e9be9d5e76e34872f0c37d72e25bc27fe9e2c54c <749eac5a6687ec99116e0691d0d71225254654e3
  6. Affected versionversion=e9be9d5e76e34872f0c37d72e25bc27fe9e2c54c <c8b359dddb418c60df1a69beea01d1b3322bfe83
  7. Affected versionversion=e9be9d5e76e34872f0c37d72e25bc27fe9e2c54c <f9248e2f73fb4afe08324485e98c815ac084d166
  8. Affected versionversion=e9be9d5e76e34872f0c37d72e25bc27fe9e2c54c <ff43d008bbf9b27ada434d6455f039a5ef6cee53

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.18; version=e9be9d5e76e34872f0c37d72e25bc27fe9e2c54c <065bf5dd21639f80e68450de16bda829784dbb8c; version=e9be9d5e76e34872f0c37d72e25bc27fe9e2c54c <5f86e79c0b2287ffdabe6c1b305a36c4e0f40fe3; version=e9be9d5e76e34872f0c37d72e25bc27fe9e2c54c <72014e7745cc8250bb8f27bd78694dfd3f1b5773; version=e9be9d5e76e34872f0c37d72e25bc27fe9e2c54c <749eac5a6687ec99116e0691d0d71225254654e3; version=e9be9d5e76e34872f0c37d72e25bc27fe9e2c54c <c8b359dddb418c60df1a69beea01d1b3322bfe83; version=e9be9d5e76e34872f0c37d72e25bc27fe9e2c54c <f9248e2f73fb4afe08324485e98c815ac084d166; version=e9be9d5e76e34872f0c37d72e25bc27fe9e2c54c <ff43d008bbf9b27ada434d6455f039a5ef6cee53

Published CVSS scores

7.8NIST National Vulnerability DatabaseCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
6.7Oracle LinuxCVSS:3.1/AV:L/AC:L/PR:H/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

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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