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No exploitation reportedFix available

CVE-2023-29469

No exploitation reported by the sources we read.

  • Published2023-04-24
  • WeaknessCWE-415

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

An issue was discovered in libxml2 before 2.10.4. When hashing empty dict strings in a crafted XML document, xmlDictComputeFastKey in dict.c can produce non-deterministic values, leading to various logic and memory errors, such as a double free. This behavior occurs because there is an attempt to use the first byte of an empty string, and any value is possible (not solely the '\0' value).

Timeline

dates in UTC
  1. 2023-04-2421:15CVE publishedNVD

Observed activity

isMalicious corpus · updated 2026-10-24 03:37 UTC
Indicators tagged with this CVE, per day0 indicators over 7 days
Block these indicators
  • Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2023-29469?format=txt
  • CSV export: https://api.ismalicious.com/edl/cve/CVE-2023-29469?format=csv
  • TAXII collection of exploited CVEs
  • The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD
Debian debian linux
BranchAffectedFixed in
10.0= 10.0no fix published
Xmlsoft libxml2
BranchAffectedFixed in
2.10< 2.10.42.10.4

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • libxml2AlmaLinux:9all versions · fixed in 2.9.13-3.el9_2.1and 2 other packages
  • libxml2AlmaLinux:8all versions · fixed in 2.9.7-16.el8_8.1and 2 other packages

Full record on NVD

Fix

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof-of-concept repositories
none listed
PoC-in-GitHub

Sources

  • CISA-ADPSSVC decisionnone2025-02-04
  • OpenCVESSVC decisionnone—
  • CISA-ADPCVSS 3.16.52025-02-04
  • NVDCVSS 3.16.5read 2026-10-23
  • CISA-ADPweakness (CWE)CWE-4152025-02-04
  • NVDweakness (CWE)CWE-415read 2026-10-23
  • FIRST EPSSEPSS score1.3 %2026-10-23
  • OSVaffected packages—

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Published
2023-04-24
Last Modified
2026-10-14
NVD status
Modified

Frequently asked questions

What is CVE-2023-29469?

An issue was discovered in libxml2 before 2.10.4. When hashing empty dict strings in a crafted XML document, xmlDictComputeFastKey in dict.c can produce non-deterministic values, leading to various logic and memory errors, such as a double free. This behavior occurs because there is an attempt to use the first byte of an empty string, and any value is possible (not solely the '\0' value).

Is CVE-2023-29469 actively exploited?

Active exploitation of CVE-2023-29469 has not been confirmed. Its EPSS score was 1.3% on 2026-10-23, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2023-29469?

CVE-2023-29469 has a CVSS v3 base score of 6.5 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

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