CVE-2026-90104
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
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 Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 4aece6a19cf7f474f15eb861ba74db4479884ce3 < f31f3c042e024aef437cda42f0424ae8d4594b6c | affected |
| Linux | Linux | 4aece6a19cf7f474f15eb861ba74db4479884ce3 < 8fa4804fe62ca4155a2d8fc2789d630376cbf2fc | affected |
| Linux | Linux | 2.6.31 | affected |
| Linux | Linux | 0 < 2.6.31 | unaffected |
| Linux | Linux | 7.2.6 <= 7.2.* | unaffected |
| Linux | Linux | 7.3-rc1 <= * | unaffected |
Weaknesses
References
- https://git.kernel.org/stable/c/f31f3c042e024aef437cda42f0424ae8d4594b6c
- https://git.kernel.org/stable/c/8fa4804fe62ca4155a2d8fc2789d630376cbf2fc
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