CVE-2026-90104

Published: September 19, 2026Last modified: September 19, 2026

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.

Severity score breakdown

Status

References

• https://git.kernel.org/stable/c/8fa4804fe62ca4155a2d8fc2789d630376cbf2fc
• https://git.kernel.org/stable/c/f31f3c042e024aef437cda42f0424ae8d4594b6c