CVE-2026-22991

In the Linux kernel, the following vulnerability has been resolved: libceph: make free_choose_arg_map() resilient to partial allocation free_choose_arg_map() may dereference a NULL pointer if its caller fails after a partial allocation. For example, in decode_choose_args(), if allocation of arg_map->args fails, execution jumps to the fail label and free_choose_arg_map() is called. Since arg_map->size is updated to a non-zero value before memory allocation, free_choose_arg_map() will iterate over arg_map->args and dereference a NULL pointer. To prevent this potential NULL pointer dereference and make free_choose_arg_map() more resilient, add checks for pointers before iterating.

• linux linux kernel (>= 4.13 < 5.10.248) • linux linux kernel (>= 5.11 < 5.15.198) • linux linux kernel (>= 5.16 < 6.1.161) • linux linux kernel (>= 6.2 < 6.6.121) • linux linux kernel (>= 6.7 < 6.12.66) • linux linux kernel (>= 6.13 < 6.18.6) • linux linux kernel 6.19