PT-2026-80543

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...

UBUNTU-CVE-2026-26824

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 readMSAT is not fully initialized before being consumed by ole2validatesectorchain, which may result in application crashe...

PT-2026-46057

Name of the Vulnerable Software and Affected Versions libxls versions prior to 1.6.4 Description The OLE container parser contains an issue where memory allocated for the Master Sector Allocation Table MSAT in the read MSAT function is not fully initialized before being used by the ole2 validate...

libxls security vulnerabilities

libxls is an open-source C library designed for reading old binary OLE-formatted Excel files. Versions of libxls 1.6.3 and earlier contain security vulnerabilities. These vulnerabilities stem from the use of uninitialized memory within the OLE container resolver, which could lead to application...

CVE-2026-26824: Use of Uninitialized Variable

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 readMSAT is not fully initialized before being consumed by ole2validatesectorchain, which may result in application crashe...