CVE-2022-49043Public exploit

Application crash via freed XInclude URI

Published Jan 26, 2025 · Updated Nov 3, 2025

Use-after-free in libxml2 before 2.11.0 allows local users to crash an XML-processing application through a crafted XInclude URI. xmlXIncludeAddNode frees the original URI before checking whether xmlSaveUri returned NULL, then formats an error with the dangling URI pointer. The application must process XInclude content while URI serialization encounters an allocation failure; the demonstrated result is a heap-use-after-free abort.

CVSS severity8.1
High
EPSS probability0.26%
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 libxml2 before 2.11.0 allows local users to crash an XML-processing application through a crafted XInclude URI. xmlXIncludeAddNode frees the original URI before checking whether xmlSaveUri returned NULL, then formats an error with the dangling URI pointer. The application must process XInclude content while URI serialization encounters an allocation failure; the demonstrated result is a heap-use-after-free abort.

The record

CVE
CVE-2022-49043
Published
Jan 26, 2025
Updated
Nov 3, 2025
Vendor
XMLSoft
Product
libxml2
Classifications
CWE-416
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jan 26, 2025CVE publishedPublication date reported by the CVE source.
  2. Nov 3, 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?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=2.0.0 <2.11.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

XMLSoft · libxml2version=2.0.0 <2.11.0

Published CVSS scores

8.1GitHub Advisory DatabaseCVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:C/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
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-416Use After Free

Public exploit references

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Technologies

Your stack

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Your stack

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