Bug 2484545 (CVE-2026-26825) - CVE-2026-26825 libxls: libxls: Information disclosure via use of uninitialized memory
Summary: CVE-2026-26825 libxls: libxls: Information disclosure via use of uninitialize...
Keywords:
Status: NEW
Alias: CVE-2026-26825
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On: 2484567
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-06-03 21:01 UTC by OSIDB Bzimport
Modified: 2026-06-03 22:32 UTC (History)
0 users

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Description OSIDB Bzimport 2026-06-03 21:01:23 UTC 
A use-of-uninitialized memory vulnerability exists in libxls 1.6.3 when parsing malformed XLS files. The issue is reachable via xls_parseWorkBook() and is triggered by uninitialized heap memory originating from the OLE layer (ole2_read). The flaw is detectable with MemorySanitizer (MSAN) and can lead to undefined behavior, incorrect parsing logic, or potential information disclosure.
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