High · published January 23, 2026
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.
| Product | Versions | Fixed in |
|---|---|---|
| linux/linux_kernel | ≥ 4.13, < 5.10.248 | 5.10.248 |
| linux/linux_kernel | ≥ 5.11, < 5.15.198 | 5.15.198 |
| linux/linux_kernel | ≥ 5.16, < 6.1.161 | 6.1.161 |
| linux/linux_kernel | ≥ 6.2, < 6.6.121 | 6.6.121 |
| linux/linux_kernel | ≥ 6.7, < 6.12.66 | 6.12.66 |
| linux/linux_kernel | ≥ 6.13, < 6.18.6 | 6.18.6 |
| linux/linux_kernel | all versions | — |
| linux/linux_kernel | all versions | — |
| linux/linux_kernel | all versions | — |
| linux/linux_kernel | all versions | — |