CVE-2026-22991

Published: January 24, 2026Last modified: January 24, 2026

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.

Status

References

• https://git.kernel.org/stable/c/8081faaf089db5280c3be820948469f7c58ef8dd
• https://git.kernel.org/stable/c/851241d3f78a5505224dc21c03d8692f530256b4
• https://git.kernel.org/stable/c/9b3730dabcf3764bfe3ff07caf55e641a0b45234
• https://git.kernel.org/stable/c/c4c2152a858c0ce4d2bff6ca8c1d5b0ef9f2cbdf
• https://git.kernel.org/stable/c/e3fe30e57649c551757a02e1cad073c47e1e075e
• https://git.kernel.org/stable/c/ec1850f663da64842614c86b20fe734be070c2ba
• https://git.kernel.org/stable/c/f21c3fdb96833aac2f533506899fe38c19cf49d5