Linux kernel BPF Map Free Deferred Heap Buffer Overflow DoS

The vulnerability of the bpfmapfreedeferred function in the kernel/bpf/syscall.c module of the Linux operating system is related to the use of memory after it is freed due to concurrent access to resources race condition. Exploiting this vulnerability could allow an attacker to compromise the...

UBUNTU-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...