CVE-2021-33200

kernel/bpf/verifier.c in the Linux kernel through 5.12.7 enforces incorrect limits for pointer arithmetic operations, aka CID-bb01a1bba579. This can be abused to perform out-of-bounds reads and writes in kernel memory, leading to local privilege escalation to root. In particular, there is a corner case where the off reg causes a masking direction change, which then results in an incorrect final aux->alu_limit.

• linux linux kernel (>= 5.4.116 < 5.4.123) • linux linux kernel (>= 5.10.33 < 5.10.41) • linux linux kernel (>= 5.11.17 < 5.12.8) • fedoraproject fedora 33 • fedoraproject fedora 34 • netapp cloud backup • netapp solidfire \& hci management node • netapp solidfire baseboard management controller • netapp h300s firmware • netapp h500s firmware • netapp h300e firmware • netapp h500e firmware • netapp h700e firmware • netapp h410s firmware • netapp h700s firmware