CVE-2026-22991 - libceph: make free_choose_arg_map() resilient to partial allocation

CVE ID : CVE-2026-22991 Published : Jan. 23, 2026, 3:24 p.m. | 1 hour, 5 minutes ago Description : 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. Severity: 0.0 | NA Visit the link for more details, such as CVSS details, affected products, timeline, and more...