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FreeBSD's kqueue copy-on-fork implementation contains two memory-safety race conditions. One condition is a use-after-free involving internal marker knotes. The other occurs when kqueue_fork_copy_knote() uses a knote file-descriptor number to index the child process's file-descriptor table without validating that the index is within bounds. A concurrent parent thread can register knotes beyond the end of the child's table, resulting in an out-of-bounds read.
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No public exploit code observed for this vulnerability.
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1 sources tracked across advisories and community write-ups. News coverage will land here when it surfaces.
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Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.