frr vulnerabilities (OSS-Fuzz)

3 vulnerabilities.

• frr OSS-Fuzz Heap-buffer-overflow in pim_pim_packet OSV-2023-764 No scoreAugust 30, 2023
• frr OSS-Fuzz UNKNOWN READ OSV-2021-1447 Fix available No scoreOctober 14, 2021
• frr OSS-Fuzz Heap-use-after-free in zebra_nhg_hash_equal OSV-2021-1127 Fix available No scoreAugust 15, 2021