CVE-2026-89947

HighCVSS 8.0/10Last modified Oct 19, 2026

Description

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).

Metrics

CVSS 3.1 8.0/10CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H

Affected software

Source: the vendor's advisory (CNA). NVD analysis pending.

VendorProductVersions
LinuxLinux>= b9778cd803b330b8d7a9b523743c35093454b77f, < c86214e6178c38a0eff39110a4e92b824f5dd403; >= f95e0f36e592e17a24ba4f56c355946448f84291, < 8b2f7a411e7ceaef268355c2150c22ee3f509c3b; >= 6ded8c22af4700bbf91da24ac025f9d05b879267, < 1e509a6707d2fd9da79bdfa24742661b34562bfd; >= 7061afacc89dec3f02f7412653b83f148a0c646b, < 404079d124d75a5da16322acc53d3ffc50b4ec68; >= 4d32504f7ae951600e216aac4e04c81b02421a9d, < f6ff0e6995dbff5cb145d7795c8f0af9c168094a; >= 7915d7d5407c026fa9343befb4d3343f7a345f97, < 4582949b7badcb91bb537ca522d69b8a35131e72; >= 7915d7d5407c026fa9343befb4d3343f7a345f97, < bf85bd6e550c17ffa585606fcc18eb5b7c95bbce; >= 7915d7d5407c026fa9343befb4d3343f7a345f97, < 628b6fee9fca292f12d07f0f1bcf1edefa949d81; 450a1d9eac98886c7d19586dd10e72a4eaf8e1bc; f18b09c998002ed6a67d1a235f3941a2662f1036; 1eb7a2f3e25075b2dc9b10c94616b066f80e79ee; >= 5.10.236, < 5.10.270; >= 5.15.180, < 5.15.221; >= 6.1.134, < 6.1.188; >= 6.6.87, < 6.6.157; >= 6.12.23, < 6.12.110; >= 5.4.292, < 5.5; >= 6.13.11, < 6.14; >= 6.14.2, < 6.15
LinuxLinux6.15

References

Timeline

Published
Sep 16, 2026
Last modified
Oct 19, 2026
NVD status
Received

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CVE-2026-89947: High severity, CVSS 8.0 | Vulnix