Boot-time out-of-bounds read via stale parent count
Published Sep 16, 2026 · Updated Sep 16, 2026
An out-of-bounds read in the Meson GXBB clock driver in Linux allows affected systems to read past a parent array during boot. The gxbb_32k_clk_sel mux retains a hard-coded parent count of four after its parent array was reduced to three entries, so __clk_register reads beyond gxbb_32k_clk_parents. The condition is reached during clock-controller initialization on affected Amlogic GXBB hardware; the published report demonstrates a KASAN finding on a WeTek Hub but does not establish an attacker-controlled path or a service interruption.
Summary
What happened
An out-of-bounds read in the Meson GXBB clock driver in Linux allows affected systems to read past a parent array during boot. The gxbb_32k_clk_sel mux retains a hard-coded parent count of four after its parent array was reduced to three entries, so __clk_register reads beyond gxbb_32k_clk_parents. The condition is reached during clock-controller initialization on affected Amlogic GXBB hardware; the published report demonstrates a KASAN finding on a WeTek Hub but does not establish an attacker-controlled path or a service interruption.
The record
- CVE
- CVE-2026-89947
- Published
- Sep 16, 2026
- Updated
- Sep 16, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- Unavailable
- Attack vector
- Unavailable
- Privileges
- Unavailable
Timeline
How it unfolded
- Sep 16, 2026CVE publishedPublication date reported by the CVE source.
- Sep 16, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=1eb7a2f3e25075b2dc9b10c94616b066f80e79ee
- Affected versionversion=450a1d9eac98886c7d19586dd10e72a4eaf8e1bc
- Affected versionversion=4d32504f7ae951600e216aac4e04c81b02421a9d <f6ff0e6995dbff5cb145d7795c8f0af9c168094a
- Affected versionversion=5.10.236 <5.10.270
- Affected versionversion=5.15.180 <5.15.221
- Affected versionversion=5.4.292 <5.5
- Affected versionversion=6.1.134 <6.1.188
- Affected versionversion=6.12.23 <6.12.110
- Affected versionversion=6.13.11 <6.14
- Affected versionversion=6.14.2 <6.15
- Affected versionversion=6.15
- Affected versionversion=6.6.87 <6.6.157
- Affected versionversion=6ded8c22af4700bbf91da24ac025f9d05b879267 <1e509a6707d2fd9da79bdfa24742661b34562bfd
- Affected versionversion=7061afacc89dec3f02f7412653b83f148a0c646b <404079d124d75a5da16322acc53d3ffc50b4ec68
- Affected versionversion=7915d7d5407c026fa9343befb4d3343f7a345f97 <4582949b7badcb91bb537ca522d69b8a35131e72
- Affected versionversion=7915d7d5407c026fa9343befb4d3343f7a345f97 <628b6fee9fca292f12d07f0f1bcf1edefa949d81
- Affected versionversion=7915d7d5407c026fa9343befb4d3343f7a345f97 <bf85bd6e550c17ffa585606fcc18eb5b7c95bbce
- Affected versionversion=b9778cd803b330b8d7a9b523743c35093454b77f <c86214e6178c38a0eff39110a4e92b824f5dd403
- Affected versionversion=f18b09c998002ed6a67d1a235f3941a2662f1036
- Affected versionversion=f95e0f36e592e17a24ba4f56c355946448f84291 <8b2f7a411e7ceaef268355c2150c22ee3f509c3b
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
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Weakness, pattern, technique
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Public exploit references
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Technologies
Your stack
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Your stack
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