xmlregexp in libxml2 before 2.15.4 has a NULL pointer dereference in xmlRegNewParserCtxt after a strdup failure, i.e., it does not calculate a string length after NULL checking.

No CVSS v4.0

Attack Vector Local

Attack Complexity High

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact Low

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
xmlsoft libxml2 unaffected
Version Status Constraints
0 affected < 2.15.4

No data.

No data.

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Project Subscriptions

Vendors Products
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Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/GNOME/libxml2/commit/e89a8aae4c9b40cdafcf66b3f9e57c62db37bb55 cve-icon cve-icon
https://github.com/GNOME/libxml2/compare/v2.15.3...v2.15.4 cve-icon cve-icon
https://gitlab.gnome.org/GNOME/libxml2/-/work_items/1107 cve-icon cve-icon
History

Sat, 05 Sep 2026 05:45:00 +0000

Type Values Removed Values Added
Title Null Pointer Dereference in libxml2 xmlregexp Parser

Sat, 05 Sep 2026 04:45:00 +0000

Type Values Removed Values Added
Description xmlregexp in libxml2 before 2.15.4 has a NULL pointer dereference in xmlRegNewParserCtxt after a strdup failure, i.e., it does not calculate a string length after NULL checking.
First Time appeared Xmlsoft
Xmlsoft libxml2
Weaknesses CWE-252
CPEs cpe:2.3:a:xmlsoft:libxml2:*:*:*:*:*:*:*:*
Vendors & Products Xmlsoft
Xmlsoft libxml2
References
Metrics cvssV3_1

{'score': 2.9, 'vector': 'CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-09-05T04:27:59.795Z

Reserved: 2026-09-05T04:27:58.625Z

Link: CVE-2026-86141

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-09-05T05:17:13.007

Modified: 2026-09-05T05:17:13.007

Link: CVE-2026-86141

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-05T05:30:17Z

Weaknesses