An attacker who submits a crafted tar file with size in header struct being 0 may be able to trigger an calling of malloc(0) for a variable gnu_longlink, causing an out-of-bounds read. (CVE-2021-33643)
An attacker who submits a crafted tar file with size in header struct being 0 may be able to trigger an calling of malloc(0) for a variable gnu_longname, causing an out-of-bounds read. (CVE-2021-33644)
The thread() function doesn't free a variable t->thbuf.gnu_longlink after allocating memory, which may cause a memory leak. (CVE-2021-33645)
The thread() function doesn't free a variable t->thbuf.gnu_longname after allocating memory, which may cause a memory leak. (CVE-2021-33646)