CVE-2024-3094

CRITICALNVD 10.010.0—
EchelonGraph scoreMEDIUM confidence

Score 10.0 from GitHub Security Advisory (severity: CRITICAL) published 2024-03-29. NVD baseline CVSS 10.0; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: ghsa, nvd
Elevated
10.0
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • High exploitation likelihood — EPSS 86%
CISA-KEV: Not listedEPSS: 86%CVSS: 10.0Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
10.0
EG Score
10.0(medium)
EPSS
99.7%
KEV
Not listed

Published

March 29, 2024

Last Modified

June 17, 2026

Advisory Details (10)

Auto-updated Jul 18, 2026
Patch available. Sources: redhat.
generic

oss-security - Re: backdoor in upstream xz/liblzma leading to ssh server compromise

http://www.openwall.com/lists/oss-security/2024/03/30/12
generic

oss-security - Re: backdoor in upstream xz/liblzma leading to ssh server compromise

http://www.openwall.com/lists/oss-security/2024/03/29/8
generic

oss-security - Re: backdoor in upstream xz/liblzma leading to ssh server compromise

http://www.openwall.com/lists/oss-security/2024/03/29/5
generic

oss-security - backdoor in upstream xz/liblzma leading to ssh server compromise

http://www.openwall.com/lists/oss-security/2024/03/29/4
generic

oss-security - Re: backdoor in upstream xz/liblzma leading to ssh server compromise

http://www.openwall.com/lists/oss-security/2024/03/29/12
generic

oss-security - Re: backdoor in upstream xz/liblzma leading to ssh server compromise

http://www.openwall.com/lists/oss-security/2024/03/29/10
generic

Urgent security alert for Fedora 40 and Fedora Rawhide users

https://www.redhat.com/en/blog/urgent-security-alert-fedora-41-and-rawhide-users
generic

oss-security - backdoor in upstream xz/liblzma leading to ssh server compromise

https://www.openwall.com/lists/oss-security/2024/03/29/4
redhat

2272210 – (CVE-2024-3094) CVE-2024-3094 xz: malicious code in distributed source

https://bugzilla.redhat.com/show_bug.cgi?id=2272210
redhat Patch Available

cve-details

https://access.redhat.com/security/cve/CVE-2024-3094

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 5× in last 7d / 15× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-07-22 14:07 UTCEPSS rescore
  2. 2026-07-22 14:07 UTCEPSS rescore
  3. 2026-07-20 17:06 UTCEPSS rescore
  4. 2026-07-15 16:56 UTCEPSS rescore
  5. 2026-07-15 16:56 UTCEPSS rescore
  6. 2026-07-13 22:29 UTCEPSS rescore
  7. 2026-07-12 21:37 UTCOSV refresh
  8. 2026-07-12 05:45 UTCEPSS rescore
  9. 2026-07-06 02:22 UTCEPSS rescore
  10. 2026-07-06 02:22 UTCEPSS rescore
  11. 2026-07-01 15:05 UTCEPSS rescore
  12. 2026-06-25 13:49 UTCEPSS rescore
  13. 2026-06-24 07:20 UTCOSV refresh
  14. 2026-06-23 21:32 UTCEPSS rescore
  15. 2026-06-23 21:32 UTCEPSS rescore
  16. 2026-06-18 17:52 UTCEPSS rescore
  17. 2026-06-18 17:51 UTCEPSS rescore
  18. 2026-06-17 17:52 UTCEPSS rescore
  19. 2026-06-15 17:47 UTCEPSS rescore
  20. 2026-06-14 23:16 UTCEPSS rescore
  21. 2026-06-13 22:59 UTCEPSS rescore
  22. 2026-06-13 22:59 UTCEPSS rescore
  23. 2026-06-12 23:11 UTCEPSS rescore
  24. 2026-06-10 22:17 UTCEPSS rescore
  25. 2026-06-10 13:21 UTCEPSS rescore
Show 19 more
  1. 2026-06-08 14:16 UTCEPSS rescore
  2. 2026-06-07 10:59 UTCOSV refresh
  3. 2026-06-06 13:46 UTCEPSS rescore
  4. 2026-06-06 13:46 UTCEPSS rescore
  5. 2026-06-05 22:46 UTCEPSS rescore
  6. 2026-06-05 22:46 UTCEPSS rescore
  7. 2026-06-05 06:09 UTCEPSS rescore
  8. 2026-06-05 06:09 UTCEPSS rescore
  9. 2026-06-04 13:11 UTCEPSS rescore
  10. 2026-06-04 13:11 UTCEPSS rescore
  11. 2026-06-02 20:12 UTCEPSS rescore
  12. 2026-06-01 13:51 UTCEPSS rescore
  13. 2026-06-01 13:51 UTCEPSS rescore
  14. 2026-05-29 13:43 UTCEPSS rescore
  15. 2026-05-28 13:44 UTCEPSS rescore
  16. 2026-05-28 13:44 UTCEPSS rescore
  17. 2026-05-28 13:44 UTCEPSS rescore
  18. 2026-05-23 04:00 UTCEG score recompute
  19. 2026-05-23 04:00 UTCGHSA enrichment

Publicly available exploits

(10 references)

Working exploit code is in the public domain (10 GitHub PoCs). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoCrobertdfrench/ifuncd-up
    First seen Jul 5, 2024

    GNU IFUNC is the real culprit behind CVE-2024-3094

    Open source ↗
  • GitHub PoCamlweems/xzbot✓ verified
    First seen Apr 2, 2024

    Reverse-engineered honeypot + reproduction harness for the xz-utils backdoor.

    Open source ↗
  • GitHub PoCr0binak/xzk8s
    First seen Apr 2, 2024

    Dockerfile and Kubernetes manifests for reproduce CVE-2024-3094

    Open source ↗
  • GitHub PoC0xlane/xz-cve-2024-3094
    First seen Apr 1, 2024

    XZ Backdoor Extract(Test on Ubuntu 23.10)

    Open source ↗
  • GitHub PoCjfrog/cve-2024-3094-tools
    First seen Mar 31, 2024
    Open source ↗
  • GitHub PoCgensecaihq/CVE-2024-3094-Vulnerability-Checker-Fixer
    First seen Mar 30, 2024

    Shell scripts to identify and fix installations of xz-utils affected by the CVE-2024-3094 vulnerability. Versions 5.6.0 and 5.6.1 of xz-utils are known to be vulnerable, and this script aids in detecting them and optionally downgrading to a stable, un-compromised version (5.4.6) or upgrading to latest version. Added Ansible Playbook

    Open source ↗
  • GitHub PoClockness-Ko/xz-vulnerable-honeypot
    First seen Mar 30, 2024

    An ssh honeypot with the XZ backdoor. CVE-2024-3094

    Open source ↗
  • GitHub PoCteyhouse/CVE-2024-3094
    First seen Mar 30, 2024

    K8S and Docker Vulnerability Check for CVE-2024-3094

    Open source ↗
  • GitHub PoCbyinarie/CVE-2024-3094-info
    First seen Mar 29, 2024

    Information for CVE-2024-3094

    Open source ↗
  • GitHub PoCFabioBaroni/CVE-2024-3094-checker
    First seen Mar 29, 2024

    Quick and dirty PoC for checking whether a vulnerable version of xz-utils is installed (CVE-2024-3094)

    Open source ↗

Past incidents using this CVE

(1)

This CVE was central to one or more publicly-documented breaches. Each card links to authoritative reporting at the time of the incident.

  • xz-utils backdoorMar 2024

    Multi-year social-engineering attack inserted a backdoor into xz-utils, used by sshd via systemd. Caught accidentally by a Microsoft engineer before reaching stable Debian/Ubuntu. Closest call in OSS supply-chain history.

    Source: Ars Technica

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2024-3094?
CVE-2024-3094 is a critical vulnerability published on March 29, 2024. 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…
When was CVE-2024-3094 disclosed?
CVE-2024-3094 was first published in the National Vulnerability Database on March 29, 2024, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2024-3094 actively exploited?
CVE-2024-3094 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 99.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2024-3094?
CVE-2024-3094 has a CVSS v3 base score of 10.0 (NVD).
How do I remediate CVE-2024-3094?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2024-3094, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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