CVE-2021-27836: libxls test.c and test2.c - NULL pointer dereference vulnerability due to xls_parseWorkSheet() misuse · Issue #94 · libxls/libxls

An issue was discoverered in in function xls_getWorkSheet in xls.c in libxls 1.6.2, allows attackers to cause a denial of service, via a crafted XLS file.