CVE-2023-52752

Host crash via CIFS session use-after-free

Published May 21, 2024 · Updated Aug 5, 2026

Use-after-free in the CIFS client in Linux Kernel allows local users to crash the host by reading DebugData during session teardown. cifs_debug_data_proc_show() traverses a session after teardown begins instead of skipping SES_EXITING entries, permitting dereference after the session is freed. Reachability requires low-privileged local access, a CIFS session racing unmount, and a read of /proc/fs/cifs/DebugData; the demonstrated result is a general protection fault that interrupts the host.

CVSS severity7.8
High
EPSS probability0.25%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in the CIFS client in Linux Kernel allows local users to crash the host by reading DebugData during session teardown. cifs_debug_data_proc_show() traverses a session after teardown begins instead of skipping SES_EXITING entries, permitting dereference after the session is freed. Reachability requires low-privileged local access, a CIFS session racing unmount, and a read of /proc/fs/cifs/DebugData; the demonstrated result is a general protection fault that interrupts the host.

The record

CVE
CVE-2023-52752
Published
May 21, 2024
Updated
Aug 5, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-416, T1499
Attack vector
local
Privileges
authenticated

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

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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=3.12.48 <3.13
  2. Affected versionversion=3.13
  3. Affected versionversion=7f48558e6489d032b1584b0cc9ac4bb11072c034 <0ab6f842452ce2cae04209d4671ac6289d0aef8a
  4. Affected versionversion=7f48558e6489d032b1584b0cc9ac4bb11072c034 <2abdf136784b7edaec7ffe0f4b461b63f9c4c4de
  5. Affected versionversion=7f48558e6489d032b1584b0cc9ac4bb11072c034 <336a066990bb3962c46daf574ace596bda9303ce
  6. Affected versionversion=7f48558e6489d032b1584b0cc9ac4bb11072c034 <558817597d5fbd7af31f891b67b0fd20f0d047b7
  7. Affected versionversion=7f48558e6489d032b1584b0cc9ac4bb11072c034 <89929ea46f9cc11ba66d2c64713aa5d5dc723b09
  8. Affected versionversion=7f48558e6489d032b1584b0cc9ac4bb11072c034 <d328c09ee9f15ee5a26431f5aad7c9239fa85e62
  9. Affected versionversion=a67172a013953664b1dad03c648200c70b90506c

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=3.12.48 <3.13; version=3.13; version=7f48558e6489d032b1584b0cc9ac4bb11072c034 <0ab6f842452ce2cae04209d4671ac6289d0aef8a; version=7f48558e6489d032b1584b0cc9ac4bb11072c034 <2abdf136784b7edaec7ffe0f4b461b63f9c4c4de; version=7f48558e6489d032b1584b0cc9ac4bb11072c034 <336a066990bb3962c46daf574ace596bda9303ce; version=7f48558e6489d032b1584b0cc9ac4bb11072c034 <558817597d5fbd7af31f891b67b0fd20f0d047b7; version=7f48558e6489d032b1584b0cc9ac4bb11072c034 <89929ea46f9cc11ba66d2c64713aa5d5dc723b09; version=7f48558e6489d032b1584b0cc9ac4bb11072c034 <d328c09ee9f15ee5a26431f5aad7c9239fa85e62; version=a67172a013953664b1dad03c648200c70b90506c
The Linux Kernel Organization · Linux Kernelversion=1da177e4c3f4

Published CVSS scores

7.8CISA ADP VulnrichmentCVSS: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.

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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

CWE-416Use After Free
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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