CVE-2024-3094
criticalMalicious code was discovered in the upstream tarballs of xz, starting with version 5.6.0.
Vendor / product: Tukaani — xz
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
10.0
10.0 (CVSS v3.1)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H Severity source: NVD CVSS v3.1 (nvd@nist.gov)
Timeline (UTC)
Published: 2024-03-29 17:15
Modified: 2026-11-04 22:17
NVD status: Modified
Last synced 3 hours ago
Verified against the source API 2026-11-04 22:37 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
tukaani / xz 5.6.0, 5.6.1
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
Vendor advisory: https://access.redhat.com/security/cve/CVE-2024-3094
Vendor advisory: https://bugzilla.redhat.com/show_bug.cgi?id=2272210
Vendor advisory: https://access.redhat.com/security/cve/CVE-2024-3094
Vendor advisory: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1068024
Vendor advisory: https://bugzilla.redhat.com/show_bug.cgi?id=2272210
Vendor advisory: https://tukaani.org/xz-backdoor/
References
- https://access.redhat.com/security/cve/CVE-2024-3094 secalert@redhat.com
- https://bugzilla.redhat.com/show_bug.cgi?id=2272210 secalert@redhat.com
- https://www.openwall.com/lists/oss-security/2024/03/29/4 secalert@redhat.com
- https://www.redhat.com/en/blog/urgent-security-alert-fedora-41-and-rawhide-users secalert@redhat.com
- 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://access.redhat.com/security/cve/CVE-2024-3094 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://arstechnica.com/security/2024/03/backdoor-found-in-widely-used-linux-utility-break... af854a3a-2127-422b-91ae-364da2661108
- https://aws.amazon.com/security/security-bulletins/AWS-2024-002/ af854a3a-2127-422b-91ae-364da2661108
- https://blog.netbsd.org/tnf/entry/statement_on_backdoor_in_xz af854a3a-2127-422b-91ae-364da2661108
- https://boehs.org/node/everything-i-know-about-the-xz-backdoor af854a3a-2127-422b-91ae-364da2661108
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1068024 af854a3a-2127-422b-91ae-364da2661108
- https://bugs.gentoo.org/928134 af854a3a-2127-422b-91ae-364da2661108
- https://bugzilla.redhat.com/show_bug.cgi?id=2272210 af854a3a-2127-422b-91ae-364da2661108
- https://bugzilla.suse.com/show_bug.cgi?id=1222124 af854a3a-2127-422b-91ae-364da2661108
- https://discourse.nixos.org/t/cve-2024-3094-malicious-code-in-xz-5-6-0-and-5-6-1-tarballs/... af854a3a-2127-422b-91ae-364da2661108
Data sources
NVD CVE API 2.0 — fetched 2026-11-04 22:37 UTC · record ↗