CVE-2021-33646: High severity Feep Libtar vulnerability
Last updated 31 March 2025
Other sources
The thread() function doesn’t free a variable t->thbuf.gnulongname after allocating memory, which may cause a memory leak.
— MITRE
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
debian/libtarto a version that resolves this vulnerability.Fixed in 1.2.20-8+deb12u1~deb11u1Fixed in 1.2.20-8+deb12u1
Event History
Frequently Asked Questions
What is the severity of CVE-2021-33646?
CVE-2021-33646 is classified as a medium severity vulnerability due to its potential to cause memory leaks.
How do I fix CVE-2021-33646?
To fix CVE-2021-33646, update to a version of libtar that is greater than 1.2.21 or apply the relevant patches if provided.
What systems are affected by CVE-2021-33646?
CVE-2021-33646 affects versions of libtar prior to 1.2.21 and specific releases of Huawei openEuler and Fedora.
What is the impact of CVE-2021-33646?
The impact of CVE-2021-33646 is primarily a memory leak, which can lead to degraded system performance over time.
Is CVE-2021-33646 being actively exploited?
As of now, there is no public indication that CVE-2021-33646 is being actively exploited in the wild.