clk: meson: align gxbb_32k_clk_sel number of parents with actual count
Key facts
- Attack vector
- Local
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- High · Low · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA.
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: ================================================================== 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).
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Linux | Linux | 5.10.236 to before 5.10.270; 5.15.180 to before 5.15.221; 6.1.134 to before 6.1.188; 6.6.87 to before 6.6.157; 6.12.23 to before 6.12.110; 5.4.292 to before 5.5; 6.13.11 to before 6.14; 6.14.2 to before 6.15 | 5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.110, 5.5, 6.14, 6.15 | Patch available | CNA |
| Linux | Linux | 6.15 and later | 5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.110, 6.18.51, 7.2.5, 7.3 | Patch available | CNA |
- Linux VendorLinux Affected 5.10.236 to before 5.10.270; 5.15.180 to before 5.15.221; 6.1.134 to before 6.1.188; 6.6.87 to before 6.6.157; 6.12.23 to before 6.12.110; 5.4.292 to before 5.5; 6.13.11 to before 6.14; 6.14.2 to before 6.15 Fixed in 5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.110, 5.5, 6.14, 6.15 Patch available CNA
- Linux VendorLinux Affected 6.15 and later Fixed in 5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.110, 6.18.51, 7.2.5, 7.3 Patch available CNA
Remediation
- Fix · CNA Linux (Linux) Fixed in 5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.110, 5.5, 6.14, 6.15
- Fix · CNA Linux (Linux) Fixed in 5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.110, 6.18.51, 7.2.5, 7.3
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
Not affected: 7 products
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat OpenShift Container Platform 4
- Red Hat OpenShift Container Platform 5
Timeline
- 2026-10-02 Threatist record created from CVE-2026-89947
- 2026-10-03 Alias added: GHSA-8jgg-jgf5-2v4q
- 2026-10-19 Fix available: Linux/[email protected] · CNA
- 2026-11-06 Affected versions changed · Red Hat
- 2026-11-06 CVSS score added · Red Hat
References
Other 8
- https://git.kernel.org/stable/c/c86214e6178c38a0eff39110a4e92b824f5dd403
- https://git.kernel.org/stable/c/8b2f7a411e7ceaef268355c2150c22ee3f509c3b
- https://git.kernel.org/stable/c/1e509a6707d2fd9da79bdfa24742661b34562bfd
- https://git.kernel.org/stable/c/404079d124d75a5da16322acc53d3ffc50b4ec68
- https://git.kernel.org/stable/c/f6ff0e6995dbff5cb145d7795c8f0af9c168094a
- https://git.kernel.org/stable/c/4582949b7badcb91bb537ca522d69b8a35131e72
- https://git.kernel.org/stable/c/bf85bd6e550c17ffa585606fcc18eb5b7c95bbce
- https://git.kernel.org/stable/c/628b6fee9fca292f12d07f0f1bcf1edefa949d81
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Sources
- CVE-2026-89947 · CVE Program
- CVE-2026-89947 · NVD
- FIRST EPSS
- GHSA-8jgg-jgf5-2v4q · GitHub Advisory Database · CC BY 4.0
- CVE-2026-89947 · Red Hat security data · CC BY 4.0
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