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A vulnerability in the Linux kernel's io_uring subsystem (prior to version 5.4.2) allows unprivileged users to execute IORING_OP_SENDMSG operations with kernel worker threads that inadvertently inherit UID 0 and full capabilities. This occurs due to improper context handling in fs/io-wq.c, fs/io_uring.c, and net/socket.c, resulting in privileged actions being performed on behalf of unprivileged users. For example, an attacker can bypass restrictions and add IPv4 addresses to the loopback interface.
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No valid public exploits. Mallory filtered out 1 candidate as fakes, detection scripts, or README-only repos.
All candidate exploits were filtered out by Mallory's validation.
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No public activity observed for this vulnerability.
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Cross-references every affected SKU, including bundled OEM variants.
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