{"id":"CVE-2024-3094","aliases":["GHSA-rxwq-x6h5-x525"],"url":"https://o3.security/vulnerability/CVE-2024-3094","summary":"Xz: malicious code in distributed source","details":"Malicious code was discovered in the upstream tarballs of xz, starting with version 5.6.0. \r\nThrough 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.","published":"2024-03-29T16:51:12.588Z","modified":"2026-08-30T03:30:34.899735776Z","cvss":{"score":10,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H"},"epss":{"score":0.85974,"percentile":0.99712,"asOf":"2026-08-17"},"cisaKev":null,"exploitsKnown":45,"affectedPackages":[],"fix":null,"references":[{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2024/03/29/10"},{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2024/03/29/12"},{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2024/03/29/4"},{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2024/03/29/5"},{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2024/03/29/8"},{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2024/03/30/12"},{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2024/03/30/27"},{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2024/03/30/36"},{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2024/03/30/5"},{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2024/04/16/5"},{"type":"WEB","url":"https://access.redhat.com/downloads/content/package-browser/"},{"type":"WEB","url":"https://access.redhat.com/jbossnetwork/restricted/listSoftware.html"},{"type":"WEB","url":"https://ariadne.space/2024/04/02/the-xz-utils-backdoor-is-a-symptom-of-a-larger-problem/"},{"type":"WEB","url":"https://arstechnica.com/security/2024/03/backdoor-found-in-widely-used-linux-utility-breaks-encrypted-ssh-connections/"},{"type":"WEB","url":"https://aws.amazon.com/security/security-bulletins/AWS-2024-002/"},{"type":"WEB","url":"https://boehs.org/node/everything-i-know-about-the-xz-backdoor"},{"type":"WEB","url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1068024"},{"type":"WEB","url":"https://bugs.gentoo.org/928134"},{"type":"WEB","url":"https://discourse.nixos.org/t/cve-2024-3094-malicious-code-in-xz-5-6-0-and-5-6-1-tarballs/42405"},{"type":"WEB","url":"https://gist.github.com/thesamesam/223949d5a074ebc3dce9ee78baad9e27"},{"type":"WEB","url":"https://gynvael.coldwind.pl/?lang=en&id=782"},{"type":"WEB","url":"https://lists.debian.org/debian-security-announce/2024/msg00057.html"},{"type":"WEB","url":"https://lists.freebsd.org/archives/freebsd-security/2024-March/000248.html"},{"type":"WEB","url":"https://lwn.net/Articles/967180/"},{"type":"WEB","url":"https://news.ycombinator.com/item?id=39865810"},{"type":"WEB","url":"https://news.ycombinator.com/item?id=39877267"},{"type":"WEB","url":"https://news.ycombinator.com/item?id=39895344"},{"type":"WEB","url":"https://research.swtch.com/xz-script"},{"type":"WEB","url":"https://research.swtch.com/xz-timeline"},{"type":"WEB","url":"https://security-tracker.debian.org/tracker/CVE-2024-3094"},{"type":"WEB","url":"https://security.alpinelinux.org/vuln/CVE-2024-3094"},{"type":"WEB","url":"https://security.archlinux.org/CVE-2024-3094"},{"type":"WEB","url":"https://tukaani.org/xz-backdoor/"},{"type":"WEB","url":"https://twitter.com/LetsDefendIO/status/1774804387417751958"},{"type":"WEB","url":"https://twitter.com/debian/status/1774219194638409898"},{"type":"WEB","url":"https://twitter.com/infosecb/status/1774595540233167206"},{"type":"WEB","url":"https://twitter.com/infosecb/status/1774597228864139400"},{"type":"WEB","url":"https://ubuntu.com/security/CVE-2024-3094"},{"type":"WEB","url":"https://www.cisa.gov/news-events/alerts/2024/03/29/reported-supply-chain-compromise-affecting-xz-utils-data-compression-library-cve-2024-3094"},{"type":"WEB","url":"https://www.darkreading.com/vulnerabilities-threats/are-you-affected-by-the-backdoor-in-xz-utils"},{"type":"WEB","url":"https://www.openwall.com/lists/oss-security/2024/03/29/4"},{"type":"WEB","url":"https://www.theregister.com/2024/03/29/malicious_backdoor_xz/"},{"type":"WEB","url":"https://www.vicarius.io/vsociety/vulnerabilities/cve-2024-3094"},{"type":"WEB","url":"https://xeiaso.net/notes/2024/xz-vuln/"},{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/CVE-2024-3094"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/3xxx/CVE-2024-3094.json"},{"type":"ADVISORY","url":"https://github.com/advisories/GHSA-rxwq-x6h5-x525"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-3094"},{"type":"ADVISORY","url":"https://security.netapp.com/advisory/ntap-20240402-0001/"},{"type":"REPORT","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2272210"},{"type":"REPORT","url":"https://bugzilla.suse.com/show_bug.cgi?id=1222124"},{"type":"PACKAGE","url":"https://github.com/amlweems/xzbot"},{"type":"PACKAGE","url":"https://github.com/karcherm/xz-malware"},{"type":"PACKAGE","url":"https://github.com/tukaani-project/xz"},{"type":"ARTICLE","url":"https://blog.netbsd.org/tnf/entry/statement_on_backdoor_in_xz"},{"type":"ARTICLE","url":"https://openssf.org/blog/2024/03/30/xz-backdoor-cve-2024-3094/"},{"type":"ARTICLE","url":"https://www.binarly.io/blog/persistent-risk-xz-utils-backdoor-still-lurking-in-docker-images"},{"type":"ARTICLE","url":"https://www.kali.org/blog/about-the-xz-backdoor/"},{"type":"ARTICLE","url":"https://www.redhat.com/en/blog/urgent-security-alert-fedora-41-and-rawhide-users"},{"type":"ARTICLE","url":"https://www.tenable.com/blog/frequently-asked-questions-cve-2024-3094-supply-chain-backdoor-in-xz-utils"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-30T03:30:34.899735776Z"}}