# CVE-2021-31566: bsdtar: The libarchive programming library can create and read several different streaming archive formats, including GNU tar... CVE-2021-31566 is fixed in 12 products on 1 platform, first by libarchive-tools 3.4.0-2ubuntu1.1, released December 23, 2021. It is not reported as exploited. Patch Radar priority: High. - Web page: https://patchblox.com/security/cve/CVE-2021-31566 - Priority: High - CVSS: 7.8 (Moderate) - EPSS: 0.0039 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Dec 23, 2021 ## Description The libarchive programming library can create and read several different streaming archive formats, including GNU tar, cpio, and ISO 9660 CD-ROM images. Libarchive is used notably in the bsdtar utility, scripting language bindings such as python-libarchive, and several popular desktop file managers. Security Fix(es): * libarchive: extracting a symlink with ACLs modifies ACLs of target (CVE-2021-23177) * libarchive: symbolic links incorrectly followed when changing modes, times, ACL and flags of a file while extracting an archive (CVE-2021-31566) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | bsdcat amzn 2023 | 3.5.3-2.amzn2023.0.2 | [ALAS2023-2023-071](https://patchblox.com/security/data/fix/linux/alas2023-2023-071.md) | Feb 17, 2023 | | Linux | bsdcat-debuginfo amzn 2023 | 3.5.3-2.amzn2023.0.2 | [ALAS2023-2023-071](https://patchblox.com/security/data/fix/linux/alas2023-2023-071.md) | Feb 17, 2023 | | Linux | bsdcpio amzn 2023 | 3.5.3-2.amzn2023.0.2 | [ALAS2023-2023-071](https://patchblox.com/security/data/fix/linux/alas2023-2023-071.md) | Feb 17, 2023 | | Linux | bsdcpio-debuginfo amzn 2023 | 3.5.3-2.amzn2023.0.2 | [ALAS2023-2023-071](https://patchblox.com/security/data/fix/linux/alas2023-2023-071.md) | Feb 17, 2023 | | Linux | bsdtar RHEL 8 | 0:3.3.3-3.el8_5 | [RHSA-2022:0892](https://patchblox.com/security/data/fix/linux/rhsa-2022-0892.md) | Mar 15, 2022 | | Linux | bsdtar almalinux 8 | 3.3.3-3.el8_5 | [ALSA-2022:0892](https://patchblox.com/security/data/fix/linux/alsa-2022-0892.md) | Mar 15, 2022 | | Linux | bsdtar amzn 2023 | 3.5.3-2.amzn2023.0.2 | [ALAS2023-2023-071](https://patchblox.com/security/data/fix/linux/alas2023-2023-071.md) | Feb 17, 2023 | | Linux | bsdtar ol 8 | 0:3.3.3-3.el8_5 | [ELSA-2022-0892](https://patchblox.com/security/data/fix/linux/elsa-2022-0892.md) | Mar 16, 2022 | | Linux | bsdtar-debuginfo amzn 2023 | 3.5.3-2.amzn2023.0.2 | [ALAS2023-2023-071](https://patchblox.com/security/data/fix/linux/alas2023-2023-071.md) | Feb 17, 2023 | | Linux | libarchive Debian 12.15 (bookworm) | 3.5.2-1 | [DEBIAN-CVE-2021-31566](https://patchblox.com/security/data/fix/linux/debian-cve-2021-31566.md) | Aug 23, 2022 | | Linux | libarchive Debian 13.5 (trixie) | 3.5.2-1 | [DEBIAN-CVE-2021-31566](https://patchblox.com/security/data/fix/linux/debian-cve-2021-31566.md) | Aug 23, 2022 | | Linux | libarchive Debian 14 | 3.5.2-1 | [DEBIAN-CVE-2021-31566](https://patchblox.com/security/data/fix/linux/debian-cve-2021-31566.md) | Aug 23, 2022 | | Linux | libarchive RHEL 8 | 0:3.3.3-3.el8_5 | [RHSA-2022:0892](https://patchblox.com/security/data/fix/linux/rhsa-2022-0892.md) | Mar 15, 2022 | | Linux | libarchive almalinux 8 | 3.3.3-3.el8_5 | [ALSA-2022:0892](https://patchblox.com/security/data/fix/linux/alsa-2022-0892.md) | Mar 15, 2022 | | Linux | libarchive amzn 2023 | 3.5.3-2.amzn2023.0.2 | [ALAS2023-2023-071](https://patchblox.com/security/data/fix/linux/alas2023-2023-071.md) | Feb 17, 2023 | | Linux | libarchive ol 8 | 0:3.3.3-3.el8_5 | [ELSA-2022-0892](https://patchblox.com/security/data/fix/linux/elsa-2022-0892.md) | Mar 16, 2022 | | Linux | libarchive rocky 8 | 0:3.3.3-3.el8_5 | [RLSA-2022:0892](https://patchblox.com/security/data/fix/linux/rlsa-2022-0892.md) | Mar 15, 2022 | | Linux | libarchive-debuginfo amzn 2023 | 3.5.3-2.amzn2023.0.2 | [ALAS2023-2023-071](https://patchblox.com/security/data/fix/linux/alas2023-2023-071.md) | Feb 17, 2023 | | Linux | libarchive-debugsource amzn 2023 | 3.5.3-2.amzn2023.0.2 | [ALAS2023-2023-071](https://patchblox.com/security/data/fix/linux/alas2023-2023-071.md) | Feb 17, 2023 | | Linux | libarchive-devel RHEL 8 | 0:3.3.3-3.el8_5 | [RHSA-2022:0892](https://patchblox.com/security/data/fix/linux/rhsa-2022-0892.md) | Mar 15, 2022 | | Linux | libarchive-devel almalinux 8 | 3.3.3-3.el8_5 | [ALSA-2022:0892](https://patchblox.com/security/data/fix/linux/alsa-2022-0892.md) | Mar 15, 2022 | | Linux | libarchive-devel amzn 2023 | 3.5.3-2.amzn2023.0.2 | [ALAS2023-2023-071](https://patchblox.com/security/data/fix/linux/alas2023-2023-071.md) | Feb 17, 2023 | | Linux | libarchive-devel ol 8 | 0:3.3.3-3.el8_5 | [ELSA-2022-0892](https://patchblox.com/security/data/fix/linux/elsa-2022-0892.md) | Mar 16, 2022 | | Linux | libarchive-tools Ubuntu 20.04 LTS (focal) | 3.4.0-2ubuntu1.1 | [libarchive-tools 3.4.0-2ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libarchive-tools-3.4.0-2ubuntu1.1.md) | Dec 23, 2021 | | Linux | libarchive13 Ubuntu 20.04 LTS (focal) | 3.4.0-2ubuntu1.1 | [libarchive13 3.4.0-2ubuntu1.1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libarchive13-3.4.0-2ubuntu1.1.md) | Dec 23, 2021 | --- Data as of 2026-11-09T19:38:12Z UTC. 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