---
id: CVE-2026-89947
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  clk: meson: align gxbb_32k_clk_sel number of parents with actual count

  The following out-of-bounds read has been observed by Christian on a
  GXBB WeTek Hub:
  ===========…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  clk: meson: align gxbb_32k_clk_sel number of parents with actual count

  The following out-of-bounds read has been observed by Christian on a
  GXBB WeTek Hub:
  ===========…
severity: high
cvss: 8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H'
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= b9778cd803b330b8d7a9b523743c35093454b77f <
    c86214e6178c38a0eff39110a4e92b824f5dd403
  - >-
    Linux >= f95e0f36e592e17a24ba4f56c355946448f84291 <
    8b2f7a411e7ceaef268355c2150c22ee3f509c3b
  - >-
    Linux >= 6ded8c22af4700bbf91da24ac025f9d05b879267 <
    1e509a6707d2fd9da79bdfa24742661b34562bfd
  - >-
    Linux >= 7061afacc89dec3f02f7412653b83f148a0c646b <
    404079d124d75a5da16322acc53d3ffc50b4ec68
  - >-
    Linux >= 4d32504f7ae951600e216aac4e04c81b02421a9d <
    f6ff0e6995dbff5cb145d7795c8f0af9c168094a
  - >-
    Linux >= 7915d7d5407c026fa9343befb4d3343f7a345f97 <
    4582949b7badcb91bb537ca522d69b8a35131e72
  - >-
    Linux >= 7915d7d5407c026fa9343befb4d3343f7a345f97 <
    bf85bd6e550c17ffa585606fcc18eb5b7c95bbce
  - >-
    Linux >= 7915d7d5407c026fa9343befb4d3343f7a345f97 <
    628b6fee9fca292f12d07f0f1bcf1edefa949d81
  - Linux 450a1d9eac98886c7d19586dd10e72a4eaf8e1bc
  - Linux f18b09c998002ed6a67d1a235f3941a2662f1036
  - Linux 1eb7a2f3e25075b2dc9b10c94616b066f80e79ee
  - Linux >= 5.10.236 < 5.10.270
  - Linux >= 5.15.180 < 5.15.221
  - Linux >= 6.1.134 < 6.1.188
  - Linux >= 6.6.87 < 6.6.157
  - Linux >= 6.12.23 < 6.12.110
  - Linux >= 5.4.292 < 5.5
  - Linux >= 6.13.11 < 6.14
  - Linux >= 6.14.2 < 6.15
  - Linux 6.15
published: '2026-09-16'
updated: '2026-09-16'
sourceUpdated: '2026-09-16T15:18:19.817'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89947'
references:
  - url: 'https://git.kernel.org/stable/c/1e509a6707d2fd9da79bdfa24742661b34562bfd'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/404079d124d75a5da16322acc53d3ffc50b4ec68'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/4582949b7badcb91bb537ca522d69b8a35131e72'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/628b6fee9fca292f12d07f0f1bcf1edefa949d81'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/8b2f7a411e7ceaef268355c2150c22ee3f509c3b'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/bf85bd6e550c17ffa585606fcc18eb5b7c95bbce'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/c86214e6178c38a0eff39110a4e92b824f5dd403'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/f6ff0e6995dbff5cb145d7795c8f0af9c168094a'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-16T10:53:53.964Z'
epss: 0.00182
epssPercentile: 0.08073
---

## Overview

In the Linux kernel, the following vulnerability has been resolved:

clk: meson: align gxbb_32k_clk_sel number of parents with actual count

The following out-of-bounds read has been observed by Christian on a
GXBB WeTek Hub:
==================================================================
BUG: KASAN: global-out-of-bounds in __clk_register+0x1b70/0x2418
Read of size 8 at addr ffffd66320cf88e0 by task swapper/0/1

CPU: 0 UID: 0 PID: 1 Comm: swapper/0 Not tainted 7.0.0-rc5 #1 PREEMPT
Hardware name: WeTek Hub (DT)
Call trace:
 show_stack+0x14/0x20 (C)
 dump_stack_lvl+0x74/0x94
 print_report+0x164/0x4b0
 kasan_report+0x98/0xd8
 __asan_report_load8_noabort+0x1c/0x24
 __clk_register+0x1b70/0x2418
 devm_clk_hw_register+0x74/0x15c
 meson_clkc_init+0xd4/0x20c
 meson_clkc_syscon_probe+0x5c/0x94
 platform_probe+0xbc/0x17c
 really_probe+0x184/0x844
 __driver_probe_device+0x154/0x35c
 driver_probe_device+0x60/0x188
 __driver_attach+0x168/0x4a0
 bus_for_each_dev+0xec/0x180
 driver_attach+0x38/0x58
 bus_add_driver+0x238/0x4c0
 driver_register+0x150/0x388
 __platform_driver_register+0x54/0x7c
 gxbb_clkc_driver_init+0x18/0x20
 do_one_initcall+0xb8/0x340
 kernel_init_freeable+0x49c/0x52c
 kernel_init+0x24/0x148
 ret_from_fork+0x10/0x20

The buggy address belongs to the variable:
 gxbb_32k_clk_parents+0x60/0x400

The buggy address belongs to a vmalloc virtual mapping
The buggy address belongs to the physical page:

Memory state around the buggy address:
 ffffd66320cf8780: 00 00 00 00 f9 f9 f9 f9 00 f9 f9 f9 f9 f9 f9 f9
 ffffd66320cf8800: 00 04 f9 f9 f9 f9 f9 f9 00 04 f9 f9 f9 f9 f9 f9
>ffffd66320cf8880: 00 00 00 00 00 00 00 00 00 00 00 00 f9 f9 f9 f9
                                                       ^
 ffffd66320cf8900: 00 01 f9 f9 f9 f9 f9 f9 00 06 f9 f9 f9 f9 f9 f9
 ffffd66320cf8980: 00 00 02 f9 f9 f9 f9 f9 00 00 02 f9 f9 f9 f9 f9
==================================================================

Commit 7915d7d5407c ("clk: amlogic: gxbb: drop non existing 32k clock
parent") dropped a non-existing clock parent from the gxbb_32k_clk_sel
mux but didn't adjust the hard-coded num_parents field. Fix the actual
number of parents of that mux by using ARRAY_SIZE instead (avoiding
similar problems in future).

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.