CVE-2022-24724

cmark-gfm is GitHub’s extended version of the C reference implementation of
CommonMark. Prior to versions 0.29.0.gfm.3 and 0.28.3.gfm.21, an integer
overflow in cmark-gfm’s table row parsing table.c:row_from_string may
lead to heap memory corruption when parsing tables who’s marker rows
contain more than UINT16_MAX columns. The impact of this heap corruption
ranges from Information Leak to Arbitrary Code Execution depending on how
and where cmark-gfm is used. If cmark-gfm is used for rendering remote
user controlled markdown, this vulnerability may lead to Remote Code
Execution (RCE) in applications employing affected versions of the
cmark-gfm library. This vulnerability has been patched in the following
cmark-gfm versions 0.29.0.gfm.3 and 0.28.3.gfm.21. A workaround is
available. The vulnerability exists in the table markdown extensions of
cmark-gfm. Disabling the table extension will prevent this vulnerability
from being triggered.