XZ Utils backdoor
Named by 4 kept items in this workspace.
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cited as an example of a supply-chain compromise
A backdoor in the xz-utils compression library, which ships inside most Linux base images. It lived in two specific releases, 5.6.0 and 5.6.1; teams still on the older 5.4 line were never exposed. CISA's guidance afterward was to downgrade, not upgrade.
In 2024, followed two years of trust-building contributions before the payload went in
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