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CVE-2021-29482

24
FAUCET Score

CVE-2021-29482 is a denial-of-service vulnerability affecting the xz Go library, where a malformed xz container format input can cause an infinite loop in the readUvarint function. This vulnerability carries a CVSS v3.1 score of 7.5 (High), indicating it can be exploited remotely with low complexity to achieve high availability impact without requiring user interaction or privileges. While no active exploitation, public exploit code, or significant community discussion has been observed, the issue has been patched in xz v0.5.8, and limiting input file size can serve as a workaround.

Impacted Technologies

VendorProductVersion(s)CPE
< 0.5.8CPE matchmatch criteria
cpe:2.3:a:xz_project:xz:*:*:*:*:*:go:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.44%
Probability of exploitation in next 30 days
EPSS Percentile
70.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-28
Model: v2026.06.15
This CVE's current EPSS score of 0.0144 is in the 52nd percentile among its peer group of 51,553 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (29)

github_advisorypatch availablevia nvd_reference
View patch
gopatch availablevia ghsa
Product: github.com/ulikunitz/xzFixed in: 0.5.8
redhatpatch availablevia redhat_api
Product: OpenShift Service Mesh 2.0Fixed in: servicemesh-0:2.0.9-3.el8
View patch
redhatpatch availablevia redhat_api
Product: Red Hat OpenStack Platform 16.2Fixed in: rhosp-rhel8-tech-preview/osp-director-operator:1.2.3-2
View patch
redhatpatch availablevia redhat_api
Product: RHEL-8-CNV-4.8Fixed in: container-native-virtualization/vm-import-operator-rhel8:v4.8.0-18
View patch
redhatpatch availablevia redhat_api
Product: OADP-1.0-RHEL-8Fixed in: oadp/oadp-velero-plugin-rhel8:1.0.1-5
View patch
redhatvendor investigatingvia redhat_api
Product: Red Hat OpenShift Container Platform 4Fixed in: openshift4/ose-installer
redhatvendor investigatingvia redhat_api
Product: Red Hat OpenShift Container Platform 4Fixed in: openshift4/ose-installer-artifacts
redhatvendor investigatingvia redhat_api
Product: Red Hat OpenShift Container Platform 4Fixed in: openshift4/cnf-tests-rhel8
redhatvendor investigatingvia redhat_api
Product: Red Hat OpenShift Container Platform 4Fixed in: openshift4/ose-baremetal-installer-rhel8
redhatvendor investigatingvia redhat_api
Product: Red Hat OpenShift Container Platform 4Fixed in: openshift4/ose-baremetal-machine-controllers-rhel9
redhatvendor investigatingvia redhat_api
Product: Red Hat Advanced Cluster Management for Kubernetes 2Fixed in: rhacm2/openshift-hive-rhel8
redhatno patchvia redhat_api
Product: Red Hat Quay 3Fixed in: quay/quay-operator-rhel8
redhatno patchvia redhat_api
Product: Red Hat Advanced Cluster Management for Kubernetes 2Fixed in: multicloud-operators-application-container
redhatno patchvia redhat_api
Product: Red Hat Advanced Cluster Management for Kubernetes 2Fixed in: rhacm2/cluster-curator-controller-rhel8
redhatno patchvia redhat_api
Product: Migration Toolkit for ContainersFixed in: openshift-migration-plugin-container
redhatno patchvia redhat_api
Product: Red Hat Advanced Cluster Management for Kubernetes 2Fixed in: rhacm2/multicloud-manager-rhel8
redhatno patchvia redhat_api
Product: Red Hat Advanced Cluster Management for Kubernetes 2Fixed in: rhacm2/multiclusterhub-rhel8
redhatno patchvia redhat_api
Product: Red Hat Advanced Cluster Management for Kubernetes 2Fixed in: rhacm2/search-collector-rhel9
redhatno patchvia redhat_api
Product: Red Hat OpenShift Virtualization 2Fixed in: virt-cdi-importer-container
redhatno patchvia redhat_api
Product: Red Hat OpenShift Virtualization 2Fixed in: virt-cdi-uploadserver-container
redhatno patchvia redhat_api
Product: Red Hat OpenStack Platform 16.2Fixed in: osp-director-provisioner-container
redhatno patchvia redhat_api
Product: Red Hat Quay 3Fixed in: quay/clair-rhel8
redhatno patchvia redhat_api
Product: Red Hat Quay 3Fixed in: quay/quay-builder-rhel8
redhatend of lifevia redhat_api
Product: Red Hat OpenShift Container Platform 4Fixed in: buildah
redhatend of lifevia redhat_api
Product: Red Hat OpenShift Container Platform 4Fixed in: podman
redhatend of lifevia redhat_api
Product: Red Hat OpenShift Container Platform 4Fixed in: skopeo
redhatend of lifevia redhat_api
Product: Red Hat Advanced Cluster Management for Kubernetes 2Fixed in: multicloud-operators-channel-container
redhatend of lifevia redhat_api
Product: Red Hat OpenStack Platform 16.2Fixed in: rhosp-rhel8/osp-director-downloader

Vendor Advisories (2)

goGHSA-25xm-hr59-7c27high

github.com/ulikunitz/xz fixes readUvarint Denial of Service (DoS)

May 25, 2021
redhatCVE-2021-29482Moderate

ulikunitz/xz: Infinite loop in readUvarint allows for denial of service

Aug 19, 2020

References

github.com / ulikunitz/xz/commit/69c6093c7b2397b923acf82cb378f55ab2652b9b
PatchThird Party Advisory
github.com / ulikunitz/xz/security/advisories/GHSA-25xm-hr59-7c27
Third Party Advisory