CVE-2022-23098Public exploitNetwork attack vector

Remote CPU exhaustion via persistent writable socket

Published Jan 28, 2022 · Updated Aug 3, 2024

Denial of service in ConnMan through 1.40 allows remote attackers to exhaust CPU through a nonresponsive TCP DNS server. In dnsproxy.c's TCP server reply path, the G_IO_OUT watch remains registered after a nonblocking connection succeeds, so the main loop continuously wakes on the writable socket. Exploitation requires ConnMan to connect to an attacker-controlled DNS server that keeps the TCP connection open without returning data, causing sustained 100% CPU use rather than a crash.

CVSS severity7.5
High
EPSS probability2.48%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Denial of service in ConnMan through 1.40 allows remote attackers to exhaust CPU through a nonresponsive TCP DNS server. In dnsproxy.c's TCP server reply path, the G_IO_OUT watch remains registered after a nonblocking connection succeeds, so the main loop continuously wakes on the writable socket. Exploitation requires ConnMan to connect to an attacker-controlled DNS server that keeps the TCP connection open without returning data, causing sustained 100% CPU use rather than a crash.

The record

CVE
CVE-2022-23098
Published
Jan 28, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-835, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 28, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record 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 vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.0NIST NVDAV:N/AC:L/Au:N/C:N/I:N/A:P
7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-835Loop with Unreachable Exit Condition ('Infinite Loop')
T1499Endpoint Denial of Service

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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