CVE-2023-52732Network attack vector

Filesystem corruption via unchecked malformed snap traces

Published May 21, 2024 · Updated Aug 5, 2026

Improper validation in Linux CephFS clients allows remote attackers to corrupt filesystem data through malformed MDS snap traces. The CephFS snap-trace path accepts decode failures and continues I/O and metadata operations with inconsistent snapshot state. A malicious, compromised, or on-path MDS can trigger the flaw after CephFS is mounted, causing incorrect reads, corrupt writes, hangs, or kernel crashes.

CVSS severity9.8
Critical
EPSS probability0.52%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper validation in Linux CephFS clients allows remote attackers to corrupt filesystem data through malformed MDS snap traces. The CephFS snap-trace path accepts decode failures and continues I/O and metadata operations with inconsistent snapshot state. A malicious, compromised, or on-path MDS can trigger the flaw after CephFS is mounted, causing incorrect reads, corrupt writes, hangs, or kernel crashes.

The record

CVE
CVE-2023-52732
Published
May 21, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1565.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 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

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=2.6.34
  2. Affected versionversion=9030aaf9bf0a1eee47a154c316c789e959638b0f <66ec619e4591f8350f99c5269a7ce160cccc7a7c
  3. Affected versionversion=9030aaf9bf0a1eee47a154c316c789e959638b0f <a68e564adcaa69b0930809fb64d9d5f7d9c32ba9

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=2.6.34; version=9030aaf9bf0a1eee47a154c316c789e959638b0f <66ec619e4591f8350f99c5269a7ce160cccc7a7c; version=9030aaf9bf0a1eee47a154c316c789e959638b0f <a68e564adcaa69b0930809fb64d9d5f7d9c32ba9

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
9.8kernel.orgCVSS:3.1/AV:N/AC:L/PR:N/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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1565.001Stored Data Manipulation

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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