510
backdoor in upstream xz/liblzma leading to ssh server compromise
(www.openwall.com)
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Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.
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Not regular Fedora, though, it was only in Fedora Rawhide and Fedora 41, so very very early, bleeding edge distributions. Nothing that a regular Fedora user would be using.
https://access.redhat.com/security/cve/cve-2024-3094
E: and Fedora 40 beta which some regular users could conceivably be using
https://www.redhat.com/en/blog/urgent-security-alert-fedora-41-and-rawhide-users