CVE-2023-52447

In the Linux kernel, the following vulnerability has been resolved: bpf: Defer the free of inner map when necessary When updating or deleting an inner map in map array or map htab, the map may still be accessed by non-sleepable program or sleepable program. However bpfmapfdputptr decreases the...

CVE-2023-52447

In the Linux kernel, the following vulnerability has been resolved: bpf: Defer the free of inner map when necessary When updating or deleting an inner map in map array or map htab, the map may still be accessed by non-sleepable program or sleepable program. However bpfmapfdputptr decreases the...

CVE-2023-52447

CVE-2023-52447 is a Linux kernel issue where deferral of freeing inner BPF maps could lead to use-after-free if an inner map is accessed after removal from the outer map. The fix defers the inner-map free via bpf_map_free_deferred() and enforces two RCUs (RCU grace period and task-RCU grace perio...