Name: CVE-2021-33646: Missing Release of Memory after Effective Lifetime
Published: 2022-08-09T00:00:00.000Z
Keywords: CVE, CVE-2021-33646, CWE-401, CVSS 7.5, EPSS 0.01438

The th_read() function doesn’t free a variable t->th_buf.gnu_longname after allocating memory, which may cause a memory leak.

CVSS Details

CVSS 3.1 Base Score: 7.5
CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

Covered by Rapid7

Product	Vendor Advisory	Solution File	Added	Published
Alma_linux	View advisory ↗View advisory ↗	alma-upgrade-libtar	May 23, 2023	Aug 10, 2022
Centos_linux	—	centos-upgrade-libtarcentos-upgrade-libtar-debuginfocentos-upgrade-libtar-debugsource	May 17, 2023	Aug 10, 2022
Debian	View advisory ↗	debian-upgrade-libtar	Jan 30, 2025	Aug 10, 2022
Huawei Euleros 2_0_sp5	View advisory ↗	huawei-euleros-2_0_sp5-upgrade-libtar	Nov 4, 2022	Aug 10, 2022
Huawei Euleros 2_0_sp8	View advisory ↗	huawei-euleros-2_0_sp8-upgrade-libtar	Feb 9, 2023	Aug 10, 2022
Oracle_linux	—	oracle-linux-upgrade-libtar	May 24, 2023	Aug 10, 2022
Redhat_linux	View advisory ↗	redhat-upgrade-libtarredhat-upgrade-libtar-debuginforedhat-upgrade-libtar-debugsource	May 17, 2023	Aug 10, 2022
Rocky_linux	View advisory ↗View advisory ↗	rocky-upgrade-libtarrocky-upgrade-libtar-debuginforocky-upgrade-libtar-debugsource	Dec 29, 2025	Dec 27, 2025
Ubuntu	View advisory ↗	ubuntu-pro-upgrade-libtar-devubuntu-pro-upgrade-libtar0ubuntu-upgrade-libtar-devubuntu-upgrade-libtar0ubuntu-upgrade-libtar0t64	Apr 1, 2025	Aug 10, 2022
Vmware Photon_os	View advisory ↗	vmware-photon_os_update_tdnf	Jan 20, 2025	Aug 9, 2022

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