CVE-2021-36976

6.5 MEDIUM
Published: July 20, 2021 Modified: November 03, 2025
View on NVD

Description

libarchive 3.4.1 through 3.5.1 has a use-after-free in copy_string (called from do_uncompress_block and process_block).

AI Explanation

Get an AI-powered plain-language explanation of this vulnerability and remediation steps.

Login to generate AI explanation

CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
http://seclists.org/fulldisclosure/2022/Mar/27
Source: cve@mitre.org
Mailing List Third Party Advisory
http://seclists.org/fulldisclosure/2022/Mar/28
Source: cve@mitre.org
Mailing List Third Party Advisory
http://seclists.org/fulldisclosure/2022/Mar/29
Source: cve@mitre.org
Mailing List Third Party Advisory
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=32375
Source: cve@mitre.org
Issue Tracking Third Party Advisory
https://github.com/google/oss-fuzz-vulns/blob/main/vulns/libarchive/OSV-2021-557.yaml
Source: cve@mitre.org
Third Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SE5NJQNM22ZE5Z55LPAGCUHSBQZBKMKC/
Source: cve@mitre.org
Mailing List Third Party Advisory
https://security.gentoo.org/glsa/202208-26
Source: cve@mitre.org
Third Party Advisory
https://support.apple.com/kb/HT213182
Source: cve@mitre.org
Third Party Advisory
https://support.apple.com/kb/HT213183
Source: cve@mitre.org
Third Party Advisory
https://support.apple.com/kb/HT213193
Source: cve@mitre.org
Third Party Advisory
http://seclists.org/fulldisclosure/2022/Mar/27
Source: af854a3a-2127-422b-91ae-364da2661108
Mailing List Third Party Advisory
http://seclists.org/fulldisclosure/2022/Mar/28
Source: af854a3a-2127-422b-91ae-364da2661108
Mailing List Third Party Advisory
http://seclists.org/fulldisclosure/2022/Mar/29
Source: af854a3a-2127-422b-91ae-364da2661108
Mailing List Third Party Advisory
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=32375
Source: af854a3a-2127-422b-91ae-364da2661108
Issue Tracking Third Party Advisory
https://github.com/google/oss-fuzz-vulns/blob/main/vulns/libarchive/OSV-2021-557.yaml
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
https://lists.debian.org/debian-lts-announce/2024/11/msg00007.html
Source: af854a3a-2127-422b-91ae-364da2661108
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SE5NJQNM22ZE5Z55LPAGCUHSBQZBKMKC/
Source: af854a3a-2127-422b-91ae-364da2661108
Mailing List Third Party Advisory
https://security.gentoo.org/glsa/202208-26
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
https://support.apple.com/kb/HT213182
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
https://support.apple.com/kb/HT213183
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory
https://support.apple.com/kb/HT213193
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory

21 reference(s) from NVD

Quick Stats

CVSS v3 Score
6.5 / 10.0
EPSS (Exploit Probability)
0.2%
41th percentile
Exploitation Status
Not in CISA KEV

Weaknesses (CWE)

CWE-416

Affected Vendors

libarchive fedoraproject apple splunk

Related CVEs

CVE-2025-52691 10.0
CVE-2025-15168 7.3
CVE-2025-15167 7.3
CVE-2025-15166 7.3
CVE-2025-15165 7.3