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A use-after-free vulnerability existed in the Linux kernel GENEVE networking subsystem in geneve_find_dev(), triggered by incorrect lifecycle handling of Geneve devices across network namespaces. During configuration, geneve_configure() linked struct geneve_dev.next into the Geneve list associated with the backend UDP socket namespace. If the namespace used for that linkage differed from dev_net(dev), such as when cross-namespace parameters were supplied through network namespace selection attributes, the device could later be freed when its own namespace was dismantled while its list linkage remained in the backend UDP socket namespace. Subsequent creation of another Geneve device in that namespace could cause geneve_find_dev() to traverse a stale list entry and dereference freed memory. The upstream fix changed tunnel teardown so that geneve_destroy_tunnels() invokes geneve_dellink(), ensuring the device is properly unlinked before release.
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A Linux kernel use-after-free vulnerability in geneve_find_dev().
A Linux kernel use-after-free vulnerability in geneve_find_dev().
A Linux kernel use-after-free vulnerability in geneve_find_dev().
A Linux kernel use-after-free vulnerability in the Geneve networking code, specifically in geneve_find_dev(), caused by stale linkage across network namespaces during device teardown and later reuse.
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Every observed campaign linking this CVE to a named adversary.
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Cross-references every affected SKU, including bundled OEM variants.
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