Description
In the Linux kernel, the following vulnerability has been resolved: NFSv4.1: zero referring call lists before decoding decode_cb_sequence_args() allocates csa_rclists with kmalloc_objs(), so each referring_call_list starts uninitialized. decode_rc_list() assigns rcl_refcalls only when rcl_nrefcalls is nonzero. A valid list with zero referring calls therefore leaves the pointer uninitialized, and nfs4_callback_sequence() later passes stale slab contents to kfree(). Allocate csa_rclists with kzalloc_objs() so every rcl_refcalls member is NULL from the beginning, including valid empty referring call lists.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
4aece6a19cf7f474f15eb861ba74db4479884ce3 to < ed54460caf5b5aa65ec03c9a6032d831f39f19f5affected4aece6a19cf7f474f15eb861ba74db4479884ce3 to < 7510a5b9edec9d9536a4e69f10edfb2592e6cf7faffected4aece6a19cf7f474f15eb861ba74db4479884ce3 to < f4d23937e1c41995c2f54af26c89b5e48a41c299affected4aece6a19cf7f474f15eb861ba74db4479884ce3 to < f31f3c042e024aef437cda42f0424ae8d4594b6caffected4aece6a19cf7f474f15eb861ba74db4479884ce3 to < 8fa4804fe62ca4155a2d8fc2789d630376cbf2fcaffected
Linux Linux
Default version status: affected
2.6.31affected0 to < 2.6.31unaffected6.6.160 to ≤ 6.6.*unaffected6.12.114 to ≤ 6.12.*unaffected6.18.57 to ≤ 6.18.*unaffected7.2.6 to ≤ 7.2.*unaffected7.3 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/ed54460caf5b5aa65ec03c9a6032d831f39f19f5 ↗
- https://git.kernel.org/stable/c/7510a5b9edec9d9536a4e69f10edfb2592e6cf7f ↗
- https://git.kernel.org/stable/c/f4d23937e1c41995c2f54af26c89b5e48a41c299 ↗
- https://git.kernel.org/stable/c/f31f3c042e024aef437cda42f0424ae8d4594b6c ↗
- https://git.kernel.org/stable/c/8fa4804fe62ca4155a2d8fc2789d630376cbf2fc ↗