libxls through version 1.6.3 contains a use of uninitialized memory vulnerability in the OLE container parser. Memory allocated for the Master Sector Allocation Table (MSAT) in read_MSAT() is not fully initialized before being consumed by ole2_validate_sector_chain(), which may result in application crashes or potential information disclosure when processing a crafted XLS file
History

Fri, 05 Jun 2026 10:45:00 +0000

Type Values Removed Values Added
First Time appeared Libxls
Libxls libxls
Vendors & Products Libxls
Libxls libxls

Thu, 04 Jun 2026 18:45:00 +0000

Type Values Removed Values Added
First Time appeared Libxls Project
Libxls Project libxls
CPEs cpe:2.3:a:libxls_project:libxls:*:*:*:*:*:*:*:*
Vendors & Products Libxls Project
Libxls Project libxls

Thu, 04 Jun 2026 15:45:00 +0000

Type Values Removed Values Added
Title Uninitialized Memory Use in libxls OLE Parser Leading to Crash or Information Disclosure

Thu, 04 Jun 2026 13:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 03 Jun 2026 21:45:00 +0000

Type Values Removed Values Added
Title Uninitialized Memory Use in libxls OLE Parser Leading to Crash or Information Disclosure
Weaknesses CWE-457

Wed, 03 Jun 2026 20:15:00 +0000

Type Values Removed Values Added
Description libxls through version 1.6.3 contains a use of uninitialized memory vulnerability in the OLE container parser. Memory allocated for the Master Sector Allocation Table (MSAT) in read_MSAT() is not fully initialized before being consumed by ole2_validate_sector_chain(), which may result in application crashes or potential information disclosure when processing a crafted XLS file
References

cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published: 2026-06-03T00:00:00.000Z

Updated: 2026-06-04T12:25:41.091Z

Reserved: 2026-02-16T00:00:00.000Z

Link: CVE-2026-26824

cve-icon Vulnrichment

Updated: 2026-06-04T12:25:21.984Z

cve-icon NVD

Status : Analyzed

Published: 2026-06-03T20:16:18.677

Modified: 2026-06-04T18:41:31.953

Link: CVE-2026-26824

cve-icon Redhat

No data.