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CVE-2024-38564 is an input-validation flaw in the Linux kernel BPF link-creation path. BPF program attachment through the legacy attach path validates the association between BPF_PROG_TYPE_CGROUP_SKB and its permitted cgroup attach type. BPF_LINK_CREATE did not enforce the equivalent restriction: it obtained the program and relied on generic attach-type checking that did not properly validate this program-type and attach-type association. Consequently, a cgroup_skb BPF program could be attached to other cgroup hooks. The fix adds explicit BPF_PROG_TYPE_CGROUP_SKB attach-type enforcement during BPF_LINK_CREATE.
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Linux kernel BPF link-creation authorization issue addressed by enforcing the BPF_PROG_TYPE_CGROUP_SKB attach type.
A Linux kernel BPF validation flaw involving enforcement of BPF_PROG_TYPE_CGROUP_SKB attachment types in BPF_LINK_CREATE.
Linux kernel BPF flaw involving missing enforcement of BPF_PROG_TYPE_CGROUP_SKB attach type in BPF_LINK_CREATE.
A Linux kernel BPF vulnerability addressed by enforcing the BPF_PROG_TYPE_CGROUP_SKB attach type during BPF_LINK_CREATE operations.
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Cross-references every affected SKU, including bundled OEM variants.
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