CVE-2024-3094
📛 CVE Title
Xz: malicious code in distributed source
Description
Malicious code was discovered in the upstream tarballs of xz, starting with version 5.6.0. Through a series of complex obfuscations, the liblzma build process extracts a prebuilt object file from a disguised test file existing in the source code, which is then used to modify specific functions in the liblzma code. This results in a modified liblzma library that can be used by any software linked against this library, intercepting and modifying the data interaction with this library.
Overview
- State
- PUBLISHED
- Assigner (CNA)
- redhat
- CVSS severity
- CRITICAL
- CVSS score
- 10.0 / 10
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H- Effective score
- 10.0 / 10 CRITICAL source: CNA overview
- CWE(s)
-
CWE-506 - Reserved
- 2024-03-29
- Published
- 2024-03-29 16:51 UTC
- Last updated
- 2025-11-20 07:17 UTC
- Source
- https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2024/3xxx/CVE-2024-3094.json
- Linked Threat
- CVE-2024-3094 — Informational: Impact of Malicious Code in XZ Tools and Libraries (CVE-2024-3094)
NVD triage scoring NVD CVE 2.0
Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.
- NVD published
- 2024-03-29 17:15:21 UTC
- NVD last modified
- 2025-08-19 01:15:57 UTC
- NVD CVSS v3.1
- 10.0 / 10 CRITICAL source: secalert@redhat.com
- NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H- Exploitability subscore
- 3.9 / 10
- Impact subscore
- 6.0 / 10
- EPSS score
- 0.8385 (probability of exploitation in next 30 days)
- EPSS percentile
- 99.31% vs all CVEs — higher = more likely to be exploited, as of 2026-05-24
NVD / KEV / EPSS data refreshed 2026-05-25 06:04 UTC. Re-run the 🛰 Backfill from NVD button above to refresh.
European Union Vulnerability Database ENISA EUVD
ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.
- EUVD ID
-
EUVD-2024-31700 - Assigner
- redhat
- Published
- Mar 29, 2024, 4:51:12 PM
- Updated
- Nov 20, 2025, 7:17:48 AM
- EUVD base score (CVSS 3.1)
-
10.0 / 10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H - EUVD-reported EPSS
- 84.5900
- Vendors
- Red Hat
- Products
-
Red Hat Enterprise Linux 7Red Hat Enterprise Linux 9Red Hat Enterprise Linux 8Red Hat JBoss Enterprise Application Platform 8Red Hat Enterprise Linux 6
- Aliases
-
GHSA-rxwq-x6h5-x525
ENISA description: Malicious code was discovered in the upstream tarballs of xz, starting with version 5.6.0. Through a series of complex obfuscations, the liblzma build process extracts a prebuilt object file from a disguised test file existing in the source code, which is then used to modify specific functions in the liblzma code. This results in a modified liblzma library that can be used by any software linked against this library, intercepting and modifying the data interaction with this library.
Affected products (7)
| Vendor | Product | Versions | Platforms |
|---|---|---|---|
| — | — |
5.6.0 (affected),
5.6.1 (affected)
|
— |
| Red Hat | Red Hat Enterprise Linux 10 | — | — |
| Red Hat | Red Hat Enterprise Linux 6 | — | — |
| Red Hat | Red Hat Enterprise Linux 7 | — | — |
| Red Hat | Red Hat Enterprise Linux 8 | — | — |
| Red Hat | Red Hat Enterprise Linux 9 | — | — |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8 | — | — |
Affected products — CPE 2.3 (2) NVD
NVD's normalized CPE 2.3 matchers, used by vendor tools (vulnerability scanners, asset managers) for automated detection. Compare with the CNA's free-text "Affected products" section above.
cpe:2.3:a:tukaani:xz:5.6.0:*:*:*:*:*:*:*cpe:2.3:a:tukaani:xz:5.6.1:*:*:*:*:*:*:*
Vendor references (4)
References embedded in the original CVE record by the assigning CNA.
- https://access.redhat.com/security/cve/CVE-2024-3094 vdb-entryx_refsource_REDHAT
- RHBZ#2272210 issue-trackingx_refsource_REDHAT
- https://www.openwall.com/lists/oss-security/2024/03/29/4
- https://www.redhat.com/en/blog/urgent-security-alert-fedora-41-and-rawhide-users
Web references (13)
DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.
- https://ubuntu.com/security/CVE-2024-3094 rapid7:ubuntu.com
- https://explore.alas.aws.amazon.com/CVE-2024-3094.html rapid7:explore.alas.aws.amazon.com
- https://security-tracker.debian.org/tracker/CVE-2024-3094 rapid7:security-tracker.debian.org
- https://security.alpinelinux.org/vuln/CVE-2024-3094 rapid7:security.alpinelinux.org
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2024-31700 rapid7:euvd.enisa.europa.eu
- https://security.archlinux.org/ASA-202403-1 rapid7:security.archlinux.org
- https://www.cve.org/CVERecord?id=CVE-2024-3094 rapid7:www.cve.org
- https://www.openwall.com/lists/oss-security/2024/03/29/4 rapid7:www.openwall.com
- http://cwe.mitre.org/data/definitions/506.html rapid7:cwe.mitre.org
- https://www.redhat.com/en/blog/urgent-security-alert-fedora-41-and-rawhide-users rapid7:www.redhat.com
- https://access.redhat.com/security/cve/CVE-2024-3094 rapid7:access.redhat.com
- https://attackerkb.com/topics/CVE-2024-3094 rapid7:attackerkb.com
- https://bugzilla.redhat.com/show_bug.cgi?id=2272210 rapid7:bugzilla.redhat.com
NVD-tagged references (59)
Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.
- https://access.redhat.com/security/cve/CVE-2024-3094 secalert@redhat.com Vendor Advisory
- https://access.redhat.com/security/cve/CVE-2024-3094 af854a3a-2127-422b-91ae-364da2661108 Vendor Advisory
- https://arstechnica.com/security/2024/03/backdoor-found-in-widely-used-linux-utility-breaks-encrypted-ssh-connections/ af854a3a-2127-422b-91ae-364da2661108 Third Party Advisory
- https://aws.amazon.com/security/security-bulletins/AWS-2024-002/ af854a3a-2127-422b-91ae-364da2661108 Third Party Advisory
- https://boehs.org/node/everything-i-know-about-the-xz-backdoor af854a3a-2127-422b-91ae-364da2661108 Third Party Advisory
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1068024 af854a3a-2127-422b-91ae-364da2661108 Mailing ListVendor Advisory
- https://bugs.gentoo.org/928134 af854a3a-2127-422b-91ae-364da2661108 Issue TrackingThird Party Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2272210 secalert@redhat.com Issue TrackingVendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2272210 af854a3a-2127-422b-91ae-364da2661108 Issue TrackingVendor Advisory
- https://bugzilla.suse.com/show_bug.cgi?id=1222124 af854a3a-2127-422b-91ae-364da2661108 Issue TrackingThird Party Advisory
- https://discourse.nixos.org/t/cve-2024-3094-malicious-code-in-xz-5-6-0-and-5-6-1-tarballs/42405 af854a3a-2127-422b-91ae-364da2661108 Third Party Advisory
- https://gist.github.com/thesamesam/223949d5a074ebc3dce9ee78baad9e27 af854a3a-2127-422b-91ae-364da2661108 Third Party Advisory
- https://github.com/advisories/GHSA-rxwq-x6h5-x525 af854a3a-2127-422b-91ae-364da2661108 Third Party Advisory
- https://github.com/karcherm/xz-malware af854a3a-2127-422b-91ae-364da2661108 Third Party Advisory
- https://gynvael.coldwind.pl/?lang=en&id=782 af854a3a-2127-422b-91ae-364da2661108 Technical DescriptionThird Party Advisory
- https://lists.debian.org/debian-security-announce/2024/msg00057.html af854a3a-2127-422b-91ae-364da2661108 Mailing ListThird Party Advisory
- https://lists.freebsd.org/archives/freebsd-security/2024-March/000248.html af854a3a-2127-422b-91ae-364da2661108 Third Party Advisory
- https://lwn.net/Articles/967180/ af854a3a-2127-422b-91ae-364da2661108 Issue TrackingThird Party Advisory
- https://news.ycombinator.com/item?id=39865810 af854a3a-2127-422b-91ae-364da2661108 Issue TrackingThird Party Advisory
- https://news.ycombinator.com/item?id=39877267 af854a3a-2127-422b-91ae-364da2661108 Issue Tracking
- https://openssf.org/blog/2024/03/30/xz-backdoor-cve-2024-3094/ af854a3a-2127-422b-91ae-364da2661108 Third Party Advisory
- https://security-tracker.debian.org/tracker/CVE-2024-3094 af854a3a-2127-422b-91ae-364da2661108 Third Party Advisory
- https://security.alpinelinux.org/vuln/CVE-2024-3094 af854a3a-2127-422b-91ae-364da2661108 Third Party Advisory
- https://security.archlinux.org/CVE-2024-3094 af854a3a-2127-422b-91ae-364da2661108 Third Party Advisory
- https://tukaani.org/xz-backdoor/ af854a3a-2127-422b-91ae-364da2661108 Issue TrackingVendor Advisory
- https://twitter.com/LetsDefendIO/status/1774804387417751958 af854a3a-2127-422b-91ae-364da2661108 Third Party Advisory
- https://twitter.com/debian/status/1774219194638409898 af854a3a-2127-422b-91ae-364da2661108 Press/Media Coverage
- https://twitter.com/infosecb/status/1774595540233167206 af854a3a-2127-422b-91ae-364da2661108 Press/Media Coverage
- https://twitter.com/infosecb/status/1774597228864139400 af854a3a-2127-422b-91ae-364da2661108 Press/Media Coverage
- https://ubuntu.com/security/CVE-2024-3094 af854a3a-2127-422b-91ae-364da2661108 Third Party Advisory
- https://www.cisa.gov/news-events/alerts/2024/03/29/reported-supply-chain-compromise-affecting-xz-utils-data-compression-library-cve-2024-3094 af854a3a-2127-422b-91ae-364da2661108 Third Party AdvisoryUS Government Resource
- https://www.darkreading.com/vulnerabilities-threats/are-you-affected-by-the-backdoor-in-xz-utils af854a3a-2127-422b-91ae-364da2661108 Third Party Advisory
- https://www.openwall.com/lists/oss-security/2024/03/29/4 secalert@redhat.com Mailing List
- https://www.openwall.com/lists/oss-security/2024/03/29/4 af854a3a-2127-422b-91ae-364da2661108 Mailing List
- https://www.redhat.com/en/blog/urgent-security-alert-fedora-41-and-rawhide-users secalert@redhat.com Vendor Advisory
- https://www.redhat.com/en/blog/urgent-security-alert-fedora-41-and-rawhide-users af854a3a-2127-422b-91ae-364da2661108 Vendor Advisory
- https://www.tenable.com/blog/frequently-asked-questions-cve-2024-3094-supply-chain-backdoor-in-xz-utils af854a3a-2127-422b-91ae-364da2661108 Third Party Advisory
- https://www.theregister.com/2024/03/29/malicious_backdoor_xz/ af854a3a-2127-422b-91ae-364da2661108 Press/Media Coverage
- https://xeiaso.net/notes/2024/xz-vuln/ af854a3a-2127-422b-91ae-364da2661108 Third Party Advisory
- http://www.openwall.com/lists/oss-security/2024/03/29/10 af854a3a-2127-422b-91ae-364da2661108
- http://www.openwall.com/lists/oss-security/2024/03/29/12 af854a3a-2127-422b-91ae-364da2661108
- http://www.openwall.com/lists/oss-security/2024/03/29/4 af854a3a-2127-422b-91ae-364da2661108
- http://www.openwall.com/lists/oss-security/2024/03/29/5 af854a3a-2127-422b-91ae-364da2661108
- http://www.openwall.com/lists/oss-security/2024/03/29/8 af854a3a-2127-422b-91ae-364da2661108
- http://www.openwall.com/lists/oss-security/2024/03/30/12 af854a3a-2127-422b-91ae-364da2661108
- http://www.openwall.com/lists/oss-security/2024/03/30/27 af854a3a-2127-422b-91ae-364da2661108
- http://www.openwall.com/lists/oss-security/2024/03/30/36 af854a3a-2127-422b-91ae-364da2661108
- http://www.openwall.com/lists/oss-security/2024/03/30/5 af854a3a-2127-422b-91ae-364da2661108
- http://www.openwall.com/lists/oss-security/2024/04/16/5 af854a3a-2127-422b-91ae-364da2661108
- https://ariadne.space/2024/04/02/the-xz-utils-backdoor-is-a-symptom-of-a-larger-problem/ af854a3a-2127-422b-91ae-364da2661108
- https://blog.netbsd.org/tnf/entry/statement_on_backdoor_in_xz af854a3a-2127-422b-91ae-364da2661108
- https://github.com/amlweems/xzbot af854a3a-2127-422b-91ae-364da2661108
- https://news.ycombinator.com/item?id=39895344 af854a3a-2127-422b-91ae-364da2661108
- https://research.swtch.com/xz-script af854a3a-2127-422b-91ae-364da2661108
- https://research.swtch.com/xz-timeline af854a3a-2127-422b-91ae-364da2661108
- https://security.netapp.com/advisory/ntap-20240402-0001/ af854a3a-2127-422b-91ae-364da2661108
- https://www.binarly.io/blog/persistent-risk-xz-utils-backdoor-still-lurking-in-docker-images af854a3a-2127-422b-91ae-364da2661108
- https://www.kali.org/blog/about-the-xz-backdoor/ af854a3a-2127-422b-91ae-364da2661108
- https://www.vicarius.io/vsociety/vulnerabilities/cve-2024-3094 af854a3a-2127-422b-91ae-364da2661108
Indicators (1)
IOCs linked to the auto-promoted Threat row.
| Type | Value | VirusTotal | Attached |
|---|---|---|---|
| cve |
CVE-2024-3094
|
no local data | 2026-05-14 09:34 UTC |
Remediations (9)
Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.
-
web:nvd.nist.gov
Description Malicious code was discovered in the upstream tarballs of xz, starting with version 5.6.0. Through a series of complex obfuscations, the liblzma build process extracts a prebuilt object file from a disguised test file existing in the source code, which is then used to modify specific functions in the liblzma code. This results in a modified liblzma library that can be used by any ...
2026-05-18 01:17 UTC -
web:security-tracker.debian.org
Vulnerable and fixed packages The table below lists information on source packages.
2026-05-18 01:17 UTC -
web:support.microsoft.com
Summary Improvements and fixes included in this update How to obtain and install the update How to obtain or download the latest cumulative update package for Linux More information File information Information about protection and security Summary This security update contains fixes and resolves vulnerabilities. To learn more about the vulnerabilities, see the following security advisories ...
2026-05-18 01:17 UTC -
web:systemweakness.com
A breakdown of CVE-2024-3094 , how the attacker hijacked liblzma, and why this almost became the biggest supply chain compromise in Linux history.
2026-05-18 01:17 UTC -
web:ubuntu.com
Description Malicious code was discovered in the upstream tarballs of xz, starting with version 5.6.0. Through a series of complex obfuscations, the liblzma build process extracts a prebuilt object file from a disguised test file existing in the source code, which is then used to modify specific functions in the liblzma code. This results in a modified liblzma library that can be used by any ...
2026-05-18 01:17 UTC -
web:www.cve.org
Description Malicious code was discovered in the upstream tarballs of xz, starting with version 5.6.0. Through a series of complex obfuscations, the liblzma build process extracts a prebuilt object file from a disguised test file existing in the source code, which is then used to modify specific functions in the liblzma code. This results in a modified liblzma library that can be used by any ...
2026-05-18 01:17 UTC -
web:www.microsoft.com
Security Update Guide Notifications Microsoft's free Security Update Guide Notifications provide links to security-related software updates and notification of re-released security updates. These notifications are sent via email throughout the month as needed.
2026-05-18 01:17 UTC -
web:www.oracle.com
Oracle Critical Patch Update Advisory - October 2024 Description A Critical Patch Update is a collection of patches for multiple security vulnerabilities. These patches address vulnerabilities in Oracle code and in third party components included in Oracle products. These patches are usually cumulative, but each advisory describes only the security patches added since the previous Critical ...
2026-05-18 01:17 UTC -
web:www.penligent.ai
CVE-2024-3094 is the XZ Utils liblzma backdoor incident that turned a routine update into a software supply-chain near-miss. This publish-ready guide explains what happened, who was affected, how to verify exposure safely, and how to harden build and artifact trust with practical commands, detection ideas, and a mitigation playbook.
2026-05-18 01:17 UTC
AI Forensic Analysis
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Raw JSON
The full cvelistV5 record. Download as CVE-2024-3094.json.
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