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TI-2018-06702 Aliases CVE-2018-9251GHSA-qvh5-3xv2-rf6p

The xz_decomp function in xzlib.c in libxml2 2.9.8, if --with-lzma is used, allows remote…

Priority LOW 29CWE-835Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
High
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-835.

Summary

The xz_decomp function in xzlib.c in libxml2 2.9.8, if --with-lzma is used, allows remote attackers to cause a denial of service (infinite loop) via a crafted XML file that triggers LZMA_MEMLIMIT_ERROR, as demonstrated by xmllint, a different vulnerability than CVE-2015-8035.

Why it matters now

EPSS 0.02357 83rd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed Red Hat: 1 advisory

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
——all versions—No fix listedCNA
  • — Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:xmlsoft:libxml2:2.9.8:*:*:*:*:*:*:*2.9.8Vulnerablexmlsoft
cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*8.0VulnerableDebian
  • cpe:2.3:a:xmlsoft:libxml2:2.9.8:*:*:*:*:*:*:* Versions 2.9.8 Vulnerable ·xmlsoft
  • cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Debian

Remediation

Red Hat 1 advisory

  • RHSA-2020:1827 Released 2020-04-28 · Red Hat rating Moderate
    libxml2 security update
    • Red Hat Enterprise Linux AppStream (v. 8) libxml2-devel-2.9.7-7.el8
    • Red Hat Enterprise Linux BaseOS (v. 8) libxml2-2.9.7-7.el8, python3-libxml2-2.9.7-7.el8

Vendor assessments

Red Hat

Red Hat rating: Low. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2020:1827
Red Hat Enterprise Linux BaseOS (v. 8)Fixed RHSA-2020:1827
Not affected: 5 products
  • Red Hat Enterprise Linux 5
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat JBoss Core Services
  • Red Hat JBoss Web Server 3

Timeline

  1. 2026-10-02 Threatist record created from CVE-2018-9251
  2. 2026-10-03 Alias added: GHSA-qvh5-3xv2-rf6p

References

Exploit 1

Advisory 1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences