CVE-2023-52700

Service interruption via wrong iterator copy direction

Published May 21, 2024 · Updated May 11, 2026

Improper iterator initialization in Linux kernel TIPC 4.0 through 6.1.12 allows local users to interrupt service with a data-free SYN. The TIPC connect path initializes its iov iterator without the copy direction expected by tipc_msg_build when it constructs a SYN or ACK without payload data, triggering the kernel iterator sanity check. A local low-privileged user must open and connect a TIPC socket; the resulting kernel warning disrupts availability without reported confidentiality or integrity impact.

CVSS severity5.5
Medium
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper iterator initialization in Linux kernel TIPC 4.0 through 6.1.12 allows local users to interrupt service with a data-free SYN. The TIPC connect path initializes its iov iterator without the copy direction expected by tipc_msg_build when it constructs a SYN or ACK without payload data, triggering the kernel iterator sanity check. A local low-privileged user must open and connect a TIPC socket; the resulting kernel warning disrupts availability without reported confidentiality or integrity impact.

The record

CVE
CVE-2023-52700
Published
May 21, 2024
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 21, 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

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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=4.0
  2. Affected versionversion=f25dcc7687d42a72de18aa41b04990a24c9e77c7 <11a4d6f67cf55883dc78e31c247d1903ed7feccc
  3. Affected versionversion=f25dcc7687d42a72de18aa41b04990a24c9e77c7 <54b6082aec178f16ad6d193b4ecdc9c4823d9a32

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=4.0; version=f25dcc7687d42a72de18aa41b04990a24c9e77c7 <11a4d6f67cf55883dc78e31c247d1903ed7feccc; version=f25dcc7687d42a72de18aa41b04990a24c9e77c7 <54b6082aec178f16ad6d193b4ecdc9c4823d9a32

Published CVSS scores

5.5OracleCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/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

T1499.004Application or System Exploitation

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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