CVE-2026-89947

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

State: Published
Severity: 8.0 High
Published: Sep 16, 2026
Updated: Oct 19, 2026
Reserved: Sep 11, 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).

Scores

CVSS	Score	Vector	Source
3.1	8.0 High	CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H	Linux

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	b9778cd803b330b8d7a9b523743c35093454b77f to before c86214e6178c38a0eff39110a4e92b824f5dd403Affected f95e0f36e592e17a24ba4f56c355946448f84291 to before 8b2f7a411e7ceaef268355c2150c22ee3f509c3bAffected 6ded8c22af4700bbf91da24ac025f9d05b879267 to before 1e509a6707d2fd9da79bdfa24742661b34562bfdAffected 7061afacc89dec3f02f7412653b83f148a0c646b to before 404079d124d75a5da16322acc53d3ffc50b4ec68Affected 4d32504f7ae951600e216aac4e04c81b02421a9d to before f6ff0e6995dbff5cb145d7795c8f0af9c168094aAffected 7915d7d5407c026fa9343befb4d3343f7a345f97 to before 4582949b7badcb91bb537ca522d69b8a35131e72Affected 7915d7d5407c026fa9343befb4d3343f7a345f97 to before bf85bd6e550c17ffa585606fcc18eb5b7c95bbceAffected 7915d7d5407c026fa9343befb4d3343f7a345f97 to before 628b6fee9fca292f12d07f0f1bcf1edefa949d81Affected 450a1d9eac98886c7d19586dd10e72a4eaf8e1bcAffected f18b09c998002ed6a67d1a235f3941a2662f1036Affected 1eb7a2f3e25075b2dc9b10c94616b066f80e79eeAffected 5.10.236 to before 5.10.270Affected 5.15.180 to before 5.15.221Affected 6.1.134 to before 6.1.188Affected 6.6.87 to before 6.6.157Affected 6.12.23 to before 6.12.110Affected 5.4.292 to before 5.5Affected 6.13.11 to before 6.14Affected 6.14.2 to before 6.15Affected
LinuxLinux	6.15Affected before 6.15Not affected 5.10.270 through 5.10.Not affected 5.15.221 through 5.15.Not affected 6.1.188 through 6.1.Not affected 6.6.157 through 6.6.Not affected 6.12.110 through 6.12.Not affected 6.18.51 through 6.18.Not affected 7.2.5 through 7.2.*Not affected 7.3 and laterNot affected

Product

Versions

LinuxLinux

b9778cd803b330b8d7a9b523743c35093454b77f to before c86214e6178c38a0eff39110a4e92b824f5dd403Affected
f95e0f36e592e17a24ba4f56c355946448f84291 to before 8b2f7a411e7ceaef268355c2150c22ee3f509c3bAffected
6ded8c22af4700bbf91da24ac025f9d05b879267 to before 1e509a6707d2fd9da79bdfa24742661b34562bfdAffected
7061afacc89dec3f02f7412653b83f148a0c646b to before 404079d124d75a5da16322acc53d3ffc50b4ec68Affected
4d32504f7ae951600e216aac4e04c81b02421a9d to before f6ff0e6995dbff5cb145d7795c8f0af9c168094aAffected
7915d7d5407c026fa9343befb4d3343f7a345f97 to before 4582949b7badcb91bb537ca522d69b8a35131e72Affected
7915d7d5407c026fa9343befb4d3343f7a345f97 to before bf85bd6e550c17ffa585606fcc18eb5b7c95bbceAffected
7915d7d5407c026fa9343befb4d3343f7a345f97 to before 628b6fee9fca292f12d07f0f1bcf1edefa949d81Affected
450a1d9eac98886c7d19586dd10e72a4eaf8e1bcAffected
f18b09c998002ed6a67d1a235f3941a2662f1036Affected
1eb7a2f3e25075b2dc9b10c94616b066f80e79eeAffected
5.10.236 to before 5.10.270Affected
5.15.180 to before 5.15.221Affected
6.1.134 to before 6.1.188Affected
6.6.87 to before 6.6.157Affected
6.12.23 to before 6.12.110Affected
5.4.292 to before 5.5Affected
6.13.11 to before 6.14Affected
6.14.2 to before 6.15Affected

LinuxLinux

6.15Affected
before 6.15Not affected
5.10.270 through 5.10.*Not affected
5.15.221 through 5.15.*Not affected
6.1.188 through 6.1.*Not affected
6.6.157 through 6.6.*Not affected
6.12.110 through 6.12.*Not affected
6.18.51 through 6.18.*Not affected
7.2.5 through 7.2.*Not affected
7.3 and laterNot affected

References

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