CVE-2022-23308Network attack vector

Service interruption via ID/IDREF use-after-free

Published Feb 26, 2022 · Updated May 5, 2025

Use-after-free in libxml2 before 2.9.13 allows remote attackers to interrupt services via crafted XML containing ID and IDREF attributes. The valid.c validation path releases memory associated with ID and IDREF attributes but subsequently accesses that freed data. Exploitation requires an application to parse attacker-controlled XML through this validation path; impact is primarily service interruption, while confidentiality and integrity are not indicated.

CVSS severity7.5
High
EPSS probability6.01%
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 2.9.13 allows remote attackers to interrupt services via crafted XML containing ID and IDREF attributes. The valid.c validation path releases memory associated with ID and IDREF attributes but subsequently accesses that freed data. Exploitation requires an application to parse attacker-controlled XML through this validation path; impact is primarily service interruption, while confidentiality and integrity are not indicated.

The record

CVE
CVE-2022-23308
Published
Feb 26, 2022
Updated
May 5, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-416
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 26, 2022CVE publishedPublication date reported by the CVE source.
  2. May 5, 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

7.5NVDCVSS: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 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 exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free

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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