CVE-2021-33640: Fedoraproject Fedora

Critical severity, CVSS 9.8. EPSS: 0.7% chance of exploitation in the next 30 days.

After tar_close(), libtar.c releases the memory pointed to by pointer t. After tar_close() is called in the list() function, it continues to use pointer t: free_longlink_longname(t->th_buf) . As a result, the released memory is used (use-after-free).

Affected products

• Fedoraproject Fedora: version 36 only; version 37 only
• Openatom Openeuler: version 20.03 only; version 22.03 only

Published 2022-12-19. Last modified 2026-06-17.