CVE-2021-20291
A deadlock vulnerability was found in 'github.com/containers/storage' in versions before 1.28.1. When a container image is processed, each layer is unpacked using `tar`. If one of those layers is not
02 Description
A deadlock vulnerability was found in 'github.com/containers/storage' in versions before 1.28.1. When a container image is processed, each layer is unpacked using `tar`. If one of those layers is not
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 1.58% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 75.1% of scored records. A rank, not a probability.
- NVD base score
- 6.5 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- Moderate. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2021-04-01 17:49Z5 YR AGO
- Last updated
- 2024-08-03 17:37Z2 YR AGO
- Reserved
- 2020-12-17
- Assigning CNA
- redhat
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- CWE-667Improper LockingClass
- Data version
- 5.1
- Document digest
- 7550e7fdeba504c54836d0a62ca8bc76004fc0af6c3371e5af959e9ba92af6be
05 Affected products
06 References
- bugzilla.redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=1939485
- lists.fedoraproject.orgFEDORA-2021-ec00da7faahttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/R5D7XL7FL24TWFMGQ3K2S72EOUSLZMKL/
- lists.fedoraproject.orgFEDORA-2021-83b3740389https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZNMB7O2UIXE34PGSCSOULGHPX5LIJBMM/
- lists.fedoraproject.orgFEDORA-2021-a3703b9dc8https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WX24EITRXVHDM5M223BVTJA2ODF2FSHI/
- lists.fedoraproject.orgFEDORA-2021-c56a213327https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/SPYOHNG2Q7DCAQZMGYLMENLKALGDLG3X/
- unit42.paloaltonetworks.comhttps://unit42.paloaltonetworks.com/cve-2021-20291/
07 Fixed in
AlmaLinux 8
- buildah Fixed in 1.19.9-1.module_el8.5.0+2614+87221ce8
- buildah-tests Fixed in 1.19.9-1.module_el8.5.0+2614+87221ce8
- cockpit-podman Fixed
A version is affected if any line below covers it.
- Affected before 29-2.module_el8.5.0+2614+87221ce8
- Affected before 29-2.module_el8.6.0+2876+9ed4eae2
- conmon Fixed
A version is affected if any line below covers it.
- Affected before 2:2.0.26-1.module_el8.5.0+2614+87221ce8
- Affected before 2:2.0.26-1.module_el8.6.0+2876+9ed4eae2
- container-selinux Fixed in 2:2.167.0-1.module_el8.5.0+2614+87221ce8
- containernetworking-plugins Fixed
A version is affected if any line below covers it.
- Affected before 0.9.1-1.module_el8.5.0+2614+87221ce8
- Affected before 0.9.1-1.module_el8.6.0+2876+9ed4eae2
- containers-common Fixed
A version is affected if any line below covers it.
- Affected before 1:1.2.4-1.module_el8.5.0+2614+87221ce8
- Affected before 1:1.2.4-1.module_el8.6.0+2876+9ed4eae2
- crit Fixed
A version is affected if any line below covers it.
- Affected before 3.15-1.module_el8.5.0+2614+87221ce8
- Affected before 3.15-1.module_el8.6.0+2876+9ed4eae2
- Affected before 3.15-3.module_el8.5.0+2613+1b78b731
- Affected before 3.15-3.module_el8.6.0+2751+06427ca3
- Affected before 3.15-3.module_el8.6.0+2877+8e437bf5
- criu Fixed
A version is affected if any line below covers it.
- Affected before 3.15-1.module_el8.5.0+2614+87221ce8
- Affected before 3.15-1.module_el8.6.0+2876+9ed4eae2
- Affected before 3.15-3.module_el8.5.0+2613+1b78b731
- Affected before 3.15-3.module_el8.6.0+2751+06427ca3
- Affected before 3.15-3.module_el8.6.0+2877+8e437bf5
- criu-devel Fixed
A version is affected if any line below covers it.
- Affected before 3.15-3.module_el8.5.0+2613+1b78b731
- Affected before 3.15-3.module_el8.6.0+2751+06427ca3
- Affected before 3.15-3.module_el8.6.0+2877+8e437bf5
- criu-libs Fixed
A version is affected if any line below covers it.
- Affected before 3.15-3.module_el8.5.0+2613+1b78b731
- Affected before 3.15-3.module_el8.6.0+2751+06427ca3
- Affected before 3.15-3.module_el8.6.0+2877+8e437bf5
- crun Fixed in 0.18-2.module_el8.5.0+2614+87221ce8
- fuse-overlayfs Fixed
A version is affected if any line below covers it.
- Affected before 1.4.0-2.module_el8.5.0+2614+87221ce8
- Affected before 1.4.0-2.module_el8.6.0+2876+9ed4eae2
- libslirp Fixed
A version is affected if any line below covers it.
- Affected before 4.3.1-1.module_el8.5.0+2614+87221ce8
- Affected before 4.3.1-1.module_el8.6.0+2876+9ed4eae2
- Affected before 4.4.0-1.module_el8.5.0+2613+1b78b731
- Affected before 4.4.0-1.module_el8.6.0+2877+8e437bf5
- libslirp-devel Fixed
A version is affected if any line below covers it.
- Affected before 4.3.1-1.module_el8.5.0+2614+87221ce8
- Affected before 4.3.1-1.module_el8.6.0+2876+9ed4eae2
- Affected before 4.4.0-1.module_el8.5.0+2613+1b78b731
- Affected before 4.4.0-1.module_el8.6.0+2877+8e437bf5
- oci-seccomp-bpf-hook Fixed
A version is affected if any line below covers it.
- Affected before 1.2.0-3.module_el8.5.0+2614+87221ce8
- Affected before 1.2.0-3.module_el8.6.0+2876+9ed4eae2
- Affected before 1.2.3-3.module_el8.5.0+2613+1b78b731
- Affected before 1.2.3-3.module_el8.6.0+2877+8e437bf5
- podman Fixed in 3.0.1-7.module_el8.5.0+2614+87221ce8
- podman-catatonit Fixed in 3.0.1-7.module_el8.5.0+2614+87221ce8
- podman-docker Fixed in 3.0.1-7.module_el8.5.0+2614+87221ce8
- podman-plugins Fixed in 3.0.1-7.module_el8.5.0+2614+87221ce8
- podman-remote Fixed in 3.0.1-7.module_el8.5.0+2614+87221ce8
- podman-tests Fixed in 3.0.1-7.module_el8.5.0+2614+87221ce8
- python3-criu Fixed
A version is affected if any line below covers it.
- Affected before 3.15-1.module_el8.5.0+2614+87221ce8
- Affected before 3.15-1.module_el8.6.0+2876+9ed4eae2
- Affected before 3.15-3.module_el8.5.0+2613+1b78b731
- Affected before 3.15-3.module_el8.6.0+2751+06427ca3
- Affected before 3.15-3.module_el8.6.0+2877+8e437bf5
- runc Fixed in 1.0.0-72.rc92.module_el8.5.0+2614+87221ce8
- skopeo Fixed
A version is affected if any line below covers it.
- Affected before 1:1.2.4-1.module_el8.5.0+2614+87221ce8
- Affected before 1:1.2.4-1.module_el8.6.0+2876+9ed4eae2
- skopeo-tests Fixed
A version is affected if any line below covers it.
- Affected before 1:1.2.4-1.module_el8.5.0+2614+87221ce8
- Affected before 1:1.2.4-1.module_el8.6.0+2876+9ed4eae2
- slirp4netns Fixed
A version is affected if any line below covers it.
- Affected before 1.1.8-1.module_el8.5.0+2613+1b78b731
- Affected before 1.1.8-1.module_el8.5.0+2614+87221ce8
- Affected before 1.1.8-1.module_el8.6.0+2876+9ed4eae2
- toolbox Fixed
A version is affected if any line below covers it.
- Affected before 0.0.99.3-0.4.module_el8.5.0+2613+1b78b731
- Affected before 0.0.99.3-0.4.module_el8.6.0+2877+8e437bf5
- Affected before 0.0.99.3-1.module_el8.5.0+2614+87221ce8
- Affected before 0.0.99.3-1.module_el8.6.0+2876+9ed4eae2
- toolbox-tests Fixed
A version is affected if any line below covers it.
- Affected before 0.0.99.3-0.4.module_el8.5.0+2613+1b78b731
- Affected before 0.0.99.3-0.4.module_el8.6.0+2877+8e437bf5
- Affected before 0.0.99.3-1.module_el8.5.0+2614+87221ce8
- Affected before 0.0.99.3-1.module_el8.6.0+2876+9ed4eae2
- udica Fixed
A version is affected if any line below covers it.
- Affected before 0.2.4-1.module_el8.5.0+2614+87221ce8
- Affected before 0.2.4-1.module_el8.6.0+2876+9ed4eae2
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
AlmaLinux 9
- buildah Fixed in 1:1.27.0-2.el9
- buildah-tests Fixed in 1:1.27.0-2.el9
- podman Fixed in 2:4.2.0-3.el9
- podman-docker Fixed in 2:4.2.0-3.el9
- podman-gvproxy Fixed in 2:4.2.0-3.el9
- podman-plugins Fixed in 2:4.2.0-3.el9
- podman-remote Fixed in 2:4.2.0-3.el9
- podman-tests Fixed in 2:4.2.0-3.el9
- skopeo Fixed in 2:1.9.2-1.el9
- skopeo-tests Fixed in 2:1.9.2-1.el9
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
CloudLinux 8
- buildah Fixed in 1.19.9-1.module_el8.5.0+2614+87221ce8
- buildah-tests Fixed in 1.19.9-1.module_el8.5.0+2614+87221ce8
- cockpit-podman Fixed
A version is affected if any line below covers it.
- Affected before 29-2.module_el8.5.0+2614+87221ce8
- Affected before 29-2.module_el8.6.0+2876+9ed4eae2
- conmon Fixed
A version is affected if any line below covers it.
- Affected before 2:2.0.26-1.module_el8.5.0+2614+87221ce8
- Affected before 2:2.0.26-1.module_el8.6.0+2876+9ed4eae2
- container-selinux Fixed in 2:2.167.0-1.module_el8.5.0+2614+87221ce8
- containernetworking-plugins Fixed
A version is affected if any line below covers it.
- Affected before 0.9.1-1.module_el8.5.0+2614+87221ce8
- Affected before 0.9.1-1.module_el8.6.0+2876+9ed4eae2
- containers-common Fixed
A version is affected if any line below covers it.
- Affected before 1:1.2.4-1.module_el8.5.0+2614+87221ce8
- Affected before 1:1.2.4-1.module_el8.6.0+2876+9ed4eae2
- crit Fixed
A version is affected if any line below covers it.
- Affected before 3.15-1.module_el8.5.0+2614+87221ce8
- Affected before 3.15-1.module_el8.6.0+2876+9ed4eae2
- Affected before 3.15-3.module_el8.5.0+2613+1b78b731
- Affected before 3.15-3.module_el8.6.0+2751+06427ca3
- Affected before 3.15-3.module_el8.6.0+2877+8e437bf5
- criu Fixed
A version is affected if any line below covers it.
- Affected before 3.15-1.module_el8.5.0+2614+87221ce8
- Affected before 3.15-1.module_el8.6.0+2876+9ed4eae2
- Affected before 3.15-3.module_el8.5.0+2613+1b78b731
- Affected before 3.15-3.module_el8.6.0+2751+06427ca3
- Affected before 3.15-3.module_el8.6.0+2877+8e437bf5
- criu-devel Fixed
A version is affected if any line below covers it.
- Affected before 3.15-3.module_el8.5.0+2613+1b78b731
- Affected before 3.15-3.module_el8.6.0+2751+06427ca3
- Affected before 3.15-3.module_el8.6.0+2877+8e437bf5
- criu-libs Fixed
A version is affected if any line below covers it.
- Affected before 3.15-3.module_el8.5.0+2613+1b78b731
- Affected before 3.15-3.module_el8.6.0+2751+06427ca3
- Affected before 3.15-3.module_el8.6.0+2877+8e437bf5
- crun Fixed in 0.18-2.module_el8.5.0+2614+87221ce8
- fuse-overlayfs Fixed
A version is affected if any line below covers it.
- Affected before 1.4.0-2.module_el8.5.0+2614+87221ce8
- Affected before 1.4.0-2.module_el8.6.0+2876+9ed4eae2
- libslirp Fixed
A version is affected if any line below covers it.
- Affected before 4.3.1-1.module_el8.5.0+2614+87221ce8
- Affected before 4.3.1-1.module_el8.6.0+2876+9ed4eae2
- Affected before 4.4.0-1.module_el8.5.0+2613+1b78b731
- Affected before 4.4.0-1.module_el8.6.0+2877+8e437bf5
- libslirp-devel Fixed
A version is affected if any line below covers it.
- Affected before 4.3.1-1.module_el8.5.0+2614+87221ce8
- Affected before 4.3.1-1.module_el8.6.0+2876+9ed4eae2
- Affected before 4.4.0-1.module_el8.5.0+2613+1b78b731
- Affected before 4.4.0-1.module_el8.6.0+2877+8e437bf5
- oci-seccomp-bpf-hook Fixed
A version is affected if any line below covers it.
- Affected before 1.2.0-3.module_el8.5.0+2614+87221ce8
- Affected before 1.2.0-3.module_el8.6.0+2876+9ed4eae2
- Affected before 1.2.3-3.module_el8.5.0+2613+1b78b731
- Affected before 1.2.3-3.module_el8.6.0+2877+8e437bf5
- podman Fixed in 3.0.1-7.module_el8.5.0+2614+87221ce8
- podman-catatonit Fixed in 3.0.1-7.module_el8.5.0+2614+87221ce8
- podman-docker Fixed in 3.0.1-7.module_el8.5.0+2614+87221ce8
- podman-plugins Fixed in 3.0.1-7.module_el8.5.0+2614+87221ce8
- podman-remote Fixed in 3.0.1-7.module_el8.5.0+2614+87221ce8
- podman-tests Fixed in 3.0.1-7.module_el8.5.0+2614+87221ce8
- python3-criu Fixed
A version is affected if any line below covers it.
- Affected before 3.15-1.module_el8.5.0+2614+87221ce8
- Affected before 3.15-1.module_el8.6.0+2876+9ed4eae2
- Affected before 3.15-3.module_el8.5.0+2613+1b78b731
- Affected before 3.15-3.module_el8.6.0+2751+06427ca3
- Affected before 3.15-3.module_el8.6.0+2877+8e437bf5
- runc Fixed in 1.0.0-72.rc92.module_el8.5.0+2614+87221ce8
- skopeo Fixed
A version is affected if any line below covers it.
- Affected before 1:1.2.4-1.module_el8.5.0+2614+87221ce8
- Affected before 1:1.2.4-1.module_el8.6.0+2876+9ed4eae2
- skopeo-tests Fixed
A version is affected if any line below covers it.
- Affected before 1:1.2.4-1.module_el8.5.0+2614+87221ce8
- Affected before 1:1.2.4-1.module_el8.6.0+2876+9ed4eae2
- slirp4netns Fixed
A version is affected if any line below covers it.
- Affected before 1.1.8-1.module_el8.5.0+2613+1b78b731
- Affected before 1.1.8-1.module_el8.5.0+2614+87221ce8
- Affected before 1.1.8-1.module_el8.6.0+2876+9ed4eae2
- toolbox Fixed
A version is affected if any line below covers it.
- Affected before 0.0.99.3-0.4.module_el8.5.0+2613+1b78b731
- Affected before 0.0.99.3-0.4.module_el8.6.0+2877+8e437bf5
- Affected before 0.0.99.3-1.module_el8.5.0+2614+87221ce8
- Affected before 0.0.99.3-1.module_el8.6.0+2876+9ed4eae2
- toolbox-tests Fixed
A version is affected if any line below covers it.
- Affected before 0.0.99.3-0.4.module_el8.5.0+2613+1b78b731
- Affected before 0.0.99.3-0.4.module_el8.6.0+2877+8e437bf5
- Affected before 0.0.99.3-1.module_el8.5.0+2614+87221ce8
- Affected before 0.0.99.3-1.module_el8.6.0+2876+9ed4eae2
- udica Fixed
A version is affected if any line below covers it.
- Affected before 0.2.4-1.module_el8.5.0+2614+87221ce8
- Affected before 0.2.4-1.module_el8.6.0+2876+9ed4eae2
Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
CloudLinux 9
- buildah Fixed in 1:1.27.0-2.el9
- buildah-tests Fixed in 1:1.27.0-2.el9
- podman Fixed in 2:4.2.0-3.el9
- podman-docker Fixed in 2:4.2.0-3.el9
- podman-gvproxy Fixed in 2:4.2.0-3.el9
- podman-plugins Fixed in 2:4.2.0-3.el9
- podman-remote Fixed in 2:4.2.0-3.el9
- podman-tests Fixed in 2:4.2.0-3.el9
- skopeo Fixed in 2:1.9.2-1.el9
- skopeo-tests Fixed in 2:1.9.2-1.el9
Derived from AlmaLinux 9. Partial coverage: only packages taken from AlmaLinux 9 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
Debian 12
- golang-github-containers-storage Fixed in 1.34.1+ds1-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- golang-github-containers-storage Fixed in 1.34.1+ds1-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- golang-github-containers-storage Fixed in 1.34.1+ds1-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 20.04 LTS
- golang-github-containers-storage No fix yet
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.