CVE-2022-29824Public exploitNetwork attack vector

Denial of service via buffer-size integer overflow

Published May 3, 2022 · Updated Aug 3, 2024

Integer overflow in libxml2 before 2.9.14 and libxslt through 1.1.35 allows remote attackers to crash XML-processing applications. The xmlBuf and xmlBuffer growth functions in buf.c and tree.c add requested lengths without checking for arithmetic wraparound, so undersized allocations precede out-of-bounds writes. A victim application must process multi-gigabyte XML, and static XML generally requires XML_PARSE_HUGE; XSLT can construct large nodes dynamically, leading to memory corruption and a crash.

CVSS severity6.5
Medium
EPSS probability3.75%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Integer overflow in libxml2 before 2.9.14 and libxslt through 1.1.35 allows remote attackers to crash XML-processing applications. The xmlBuf and xmlBuffer growth functions in buf.c and tree.c add requested lengths without checking for arithmetic wraparound, so undersized allocations precede out-of-bounds writes. A victim application must process multi-gigabyte XML, and static XML generally requires XML_PARSE_HUGE; XSLT can construct large nodes dynamically, leading to memory corruption and a crash.

The record

CVE
CVE-2022-29824
Published
May 3, 2022
Updated
Aug 3, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-190, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 3, 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

4.3NIST NVDAV:N/AC:M/Au:N/C:N/I:N/A:P
6.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
6.5Oracle LinuxCVSS:3.0/AV:N/AC:L/PR:N/UI:R/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-190Integer Overflow or Wraparound
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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