What is CVE-2024-3094?
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.
The record classifies CVE-2024-3094 under weakness class CWE-506. Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs no user interaction, and has high impact on confidentiality, integrity, availability. 2 affected-product entries are recorded, across 1 vendor, listed below. The identifier was first published 946 days ago.
Severity and exploitation probability
- CVSS v3.1 base score
- 10 — CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H - EPSS (FIRST)
- 85.9% probability of exploitation in the next 30 days, higher than 99.7% of all scored CVEs
- CISA KEV
- Not listed in the CISA Known Exploited Vulnerabilities catalog
- Threadlinqs priority
- 10/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- Published
- 2024-03-29, last modified 2026-08-04
Is CVE-2024-3094 being exploited?
Weaponised exploit code for CVE-2024-3094 is publicly available. 11 public proof-of-concept repositories are tracked for this identifier. It currently carries a trending score of 38 in the Threadlinqs vulnerability feed.
- amlweems/xzbot (github)
- lockness-Ko/xz-vulnerable-honeypot (github)
- FabioBaroni/CVE-2024-3094-checker (github)
- robertdfrench/ifuncd-up (github)
- byinarie/CVE-2024-3094-info (github)
- jfrog/cve-2024-3094-tools (github)
- gensecaihq/CVE-2024-3094-Vulnerability-Checker-Fixer (github)
- 0xlane/xz-cve-2024-3094 (github)
Affected products and versions
- Tukaani: Xz 5.6.0, Xz 5.6.1
How to fix CVE-2024-3094
Vendor advisory: https://access.redhat.com/security/cve/CVE-2024-3094. Apply the vendor fix referenced above to every affected product listed in this record, then confirm the running version against the vendor advisory.
Threat activity tracking CVE-2024-3094
2 tracked threats in the Threadlinqs corpus reference CVE-2024-3094, either in the campaign’s CVE list or as an indicator on the campaign record.
Sources
Enriched from CVE.org, FIRST EPSS, public proof-of-concept repositories. Last verified by Threadlinqs on .
Third-party advisory
Other references
Showing 7 of 10 recorded references.