CVE-2023-33552Public exploit

Code execution via unchecked image-derived read length

Published Jun 1, 2023 · Updated Jan 9, 2025

Heap buffer overflow in erofs-utils 1.6 allows local users to execute arbitrary code when fsck.erofs extracts a crafted EROFS image. erofs_read_one_data in data.c passes dev_read a length derived from an image-controlled inode size without checking it against the heap buffer allocation. Exploitation requires processing the image with fsck.erofs extraction and can corrupt heap metadata in that process.

CVSS severity7.8
High
EPSS probability0.71%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Heap buffer overflow in erofs-utils 1.6 allows local users to execute arbitrary code when fsck.erofs extracts a crafted EROFS image. erofs_read_one_data in data.c passes dev_read a length derived from an image-controlled inode size without checking it against the heap buffer allocation. Exploitation requires processing the image with fsck.erofs extraction and can corrupt heap metadata in that process.

The record

CVE
CVE-2023-33552
Published
Jun 1, 2023
Updated
Jan 9, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-787, T1204.002, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 1, 2023CVE publishedPublication date reported by the CVE source.
  2. Jan 9, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.8CISA-ADPCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-787Out-of-bounds Write
T1204.002Malicious File
T1203Exploitation for Client Execution

Public exploit references

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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