Threat Intelligence / CVE / CVE-2024-3094

CVE-2024-3094 — Tukaani Xz 5.6.0

CVSS v3.1 10 (CRITICAL) · EPSS 84.9% (higher than 99.3% of all scored CVEs) · Priority 9/10 · Published 2024-03-29

As of 2025-08-19, CVE-2024-3094 is a CRITICAL-severity vulnerability in Tukaani Xz 5.6.0, CVSS v3.1 10, EPSS 84.9% (99.3th percentile). Threadlinqs Intelligence links 2 tracked threat campaigns to CVE-2024-3094, most recently “SDLC Supply Chain Attacks: ChainDrop npm Worm and Developer Pipeline Targeting”.

Last updated: 2025-08-19

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 898 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)
84.9% probability of exploitation in the next 30 days, higher than 99.3% of all scored CVEs
CISA KEV
Not listed in the CISA Known Exploited Vulnerabilities catalog
Threadlinqs priority
9/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
Published
2024-03-29, last modified 2025-08-19

Is CVE-2024-3094 being exploited?

It currently carries a trending score of 30 in the Threadlinqs vulnerability feed.

Affected products and versions

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

Seeded from nvd and not yet processed by the Threadlinqs enrichment pipeline, so blank CVSS, EPSS or KEV fields above mean NOT MEASURED rather than measured-absent.

Full detection coverage & IOCs for threats exploiting CVE-2024-3094 are available via the Threadlinqs MCP server (Purple tier). View plans →

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