CVE-2022-44311Public exploitNetwork attack vector

Memory disclosure and process crash via non-element closure

Published Nov 8, 2022 · Updated May 1, 2025

Out-of-bounds read in html2xhtml 1.3 allows attackers to read process memory or crash the converter via a crafted HTML file. The elm_close function treats non-element nodes, including comment nodes, as elements and accesses their element-only contenttype data without first validating the node type. Exploitation requires the crafted file to be processed, and demonstrated frameset inputs terminate the process with SIGSEGV; no data modification is reported.

CVSS severity8.1
High
EPSS probability1.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Out-of-bounds read in html2xhtml 1.3 allows attackers to read process memory or crash the converter via a crafted HTML file. The elm_close function treats non-element nodes, including comment nodes, as elements and accesses their element-only contenttype data without first validating the node type. Exploitation requires the crafted file to be processed, and demonstrated frameset inputs terminate the process with SIGSEGV; no data modification is reported.

The record

CVE
CVE-2022-44311
Published
Nov 8, 2022
Updated
May 1, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-125, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Nov 8, 2022CVE publishedPublication date reported by the CVE source.
  2. May 1, 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 vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.1NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:H
8.1CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-125Out-of-bounds Read
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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