{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-89947","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-09-11T19:38:34.777Z","datePublished":"2026-09-16T10:32:33.387Z","dateUpdated":"2026-09-16T14:40:32.767Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-09-16T14:40:32.767Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nclk: meson: align gxbb_32k_clk_sel number of parents with actual count\n\nThe following out-of-bounds read has been observed by Christian on a\nGXBB WeTek Hub:\n==================================================================\nBUG: KASAN: global-out-of-bounds in __clk_register+0x1b70/0x2418\nRead of size 8 at addr ffffd66320cf88e0 by task swapper/0/1\n\nCPU: 0 UID: 0 PID: 1 Comm: swapper/0 Not tainted 7.0.0-rc5 #1 PREEMPT\nHardware name: WeTek Hub (DT)\nCall trace:\n show_stack+0x14/0x20 (C)\n dump_stack_lvl+0x74/0x94\n print_report+0x164/0x4b0\n kasan_report+0x98/0xd8\n __asan_report_load8_noabort+0x1c/0x24\n __clk_register+0x1b70/0x2418\n devm_clk_hw_register+0x74/0x15c\n meson_clkc_init+0xd4/0x20c\n meson_clkc_syscon_probe+0x5c/0x94\n platform_probe+0xbc/0x17c\n really_probe+0x184/0x844\n __driver_probe_device+0x154/0x35c\n driver_probe_device+0x60/0x188\n __driver_attach+0x168/0x4a0\n bus_for_each_dev+0xec/0x180\n driver_attach+0x38/0x58\n bus_add_driver+0x238/0x4c0\n driver_register+0x150/0x388\n __platform_driver_register+0x54/0x7c\n gxbb_clkc_driver_init+0x18/0x20\n do_one_initcall+0xb8/0x340\n kernel_init_freeable+0x49c/0x52c\n kernel_init+0x24/0x148\n ret_from_fork+0x10/0x20\n\nThe buggy address belongs to the variable:\n gxbb_32k_clk_parents+0x60/0x400\n\nThe buggy address belongs to a vmalloc virtual mapping\nThe buggy address belongs to the physical page:\n\nMemory state around the buggy address:\n ffffd66320cf8780: 00 00 00 00 f9 f9 f9 f9 00 f9 f9 f9 f9 f9 f9 f9\n ffffd66320cf8800: 00 04 f9 f9 f9 f9 f9 f9 00 04 f9 f9 f9 f9 f9 f9\n>ffffd66320cf8880: 00 00 00 00 00 00 00 00 00 00 00 00 f9 f9 f9 f9\n                                                       ^\n ffffd66320cf8900: 00 01 f9 f9 f9 f9 f9 f9 00 06 f9 f9 f9 f9 f9 f9\n ffffd66320cf8980: 00 00 02 f9 f9 f9 f9 f9 00 00 02 f9 f9 f9 f9 f9\n==================================================================\n\nCommit 7915d7d5407c (\"clk: amlogic: gxbb: drop non existing 32k clock\nparent\") dropped a non-existing clock parent from the gxbb_32k_clk_sel\nmux but didn't adjust the hard-coded num_parents field. Fix the actual\nnumber of parents of that mux by using ARRAY_SIZE instead (avoiding\nsimilar problems in future)."}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H","baseScore":8,"baseSeverity":"HIGH"},"scenarios":[{"lang":"en","value":"AV:L - The over-read is reached only via meson_clkc_syscon_probe → meson_clkc_init → devm_clk_hw_register → __clk_register while binding amlogic,gxbb-clkc/gxl-clkc from the device tree on Amlogic S905/S905X boards; there is no network, adjacent-radio, or USB path into this clock controller.\nAC:L - gxbb_32k_clk_sel hard-coded num_parents=4 against a 3-entry gxbb_32k_clk_parents array, so every probe deterministically reads parent_data[3] in clk_core_populate_parent_map(); no race, timing window, or attacker-uncontrollable layout is required.\nPR:N - meson_clkc_syscon_probe runs from driver-core bind during kernel_init (swapper/0) with no capability, credential, or user-namespace check, so the defect fires automatically on affected GXBB/GXL hardware without any attacker privileges.\nUI:N - Clock registration happens automatically at boot or deferred probe from the device tree; no victim action such as mounting a filesystem or opening a device is required.\nS:U - The parent_data over-read, kstrdup of the dangling parent name, and any wild clk_hw dereference stay inside the host kernel clock framework; this is not a VM escape, IOMMU/DMA bypass, or sandbox breakout.\nC:H - clk_core_populate_parent_map() copies an extra clk_parent_data and passes the out-of-bounds fw_name/name pointers to kstrdup_const(), which does an unbounded strlen/copy; those bytes are stored as a mux parent name and can be emitted by clk debugfs possible_parents (mode 0444).\nI:L - The garbage parent is written into the in-bounds kmalloc'd parent map and can make the 2-bit 32k mux select bogus index 3 / program HHI_32K_CLK_CNTL from table[3], corrupting clock topology without an arbitrary kernel write or control-flow hijack.\nA:H - KASAN reports a global-out-of-bounds read in __clk_register, and without KASAN kstrdup_const() or clk_core_fill_parent_index()'s entry->hw->core dereference of the stale pointer can oops or panic during boot probe."}]}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/clk/meson/gxbb.c"],"versions":[{"version":"b9778cd803b330b8d7a9b523743c35093454b77f","lessThan":"c86214e6178c38a0eff39110a4e92b824f5dd403","status":"affected","versionType":"git"},{"version":"f95e0f36e592e17a24ba4f56c355946448f84291","lessThan":"8b2f7a411e7ceaef268355c2150c22ee3f509c3b","status":"affected","versionType":"git"},{"version":"6ded8c22af4700bbf91da24ac025f9d05b879267","lessThan":"1e509a6707d2fd9da79bdfa24742661b34562bfd","status":"affected","versionType":"git"},{"version":"7061afacc89dec3f02f7412653b83f148a0c646b","lessThan":"404079d124d75a5da16322acc53d3ffc50b4ec68","status":"affected","versionType":"git"},{"version":"4d32504f7ae951600e216aac4e04c81b02421a9d","lessThan":"f6ff0e6995dbff5cb145d7795c8f0af9c168094a","status":"affected","versionType":"git"},{"version":"7915d7d5407c026fa9343befb4d3343f7a345f97","lessThan":"4582949b7badcb91bb537ca522d69b8a35131e72","status":"affected","versionType":"git"},{"version":"7915d7d5407c026fa9343befb4d3343f7a345f97","lessThan":"bf85bd6e550c17ffa585606fcc18eb5b7c95bbce","status":"affected","versionType":"git"},{"version":"7915d7d5407c026fa9343befb4d3343f7a345f97","lessThan":"628b6fee9fca292f12d07f0f1bcf1edefa949d81","status":"affected","versionType":"git"},{"version":"450a1d9eac98886c7d19586dd10e72a4eaf8e1bc","status":"affected","versionType":"git"},{"version":"f18b09c998002ed6a67d1a235f3941a2662f1036","status":"affected","versionType":"git"},{"version":"1eb7a2f3e25075b2dc9b10c94616b066f80e79ee","status":"affected","versionType":"git"},{"version":"5.10.236","lessThan":"5.10.270","status":"affected","versionType":"semver"},{"version":"5.15.180","lessThan":"5.15.221","status":"affected","versionType":"semver"},{"version":"6.1.134","lessThan":"6.1.188","status":"affected","versionType":"semver"},{"version":"6.6.87","lessThan":"6.6.157","status":"affected","versionType":"semver"},{"version":"6.12.23","lessThan":"6.12.110","status":"affected","versionType":"semver"},{"version":"5.4.292","lessThan":"5.5","status":"affected","versionType":"semver"},{"version":"6.13.11","lessThan":"6.14","status":"affected","versionType":"semver"},{"version":"6.14.2","lessThan":"6.15","status":"affected","versionType":"semver"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/clk/meson/gxbb.c"],"versions":[{"version":"6.15","status":"affected"},{"version":"0","lessThan":"6.15","status":"unaffected","versionType":"semver"},{"version":"5.10.270","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.221","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.188","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.157","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.110","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.51","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.5","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3-rc1","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10.236","versionEndExcluding":"5.10.270"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15.180","versionEndExcluding":"5.15.221"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1.134","versionEndExcluding":"6.1.188"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6.87","versionEndExcluding":"6.6.157"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.12.23","versionEndExcluding":"6.12.110"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.15","versionEndExcluding":"6.18.51"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.15","versionEndExcluding":"7.2.5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.15","versionEndExcluding":"7.3-rc1"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.4.292"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.13.11"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.14.2"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/c86214e6178c38a0eff39110a4e92b824f5dd403"},{"url":"https://git.kernel.org/stable/c/8b2f7a411e7ceaef268355c2150c22ee3f509c3b"},{"url":"https://git.kernel.org/stable/c/1e509a6707d2fd9da79bdfa24742661b34562bfd"},{"url":"https://git.kernel.org/stable/c/404079d124d75a5da16322acc53d3ffc50b4ec68"},{"url":"https://git.kernel.org/stable/c/f6ff0e6995dbff5cb145d7795c8f0af9c168094a"},{"url":"https://git.kernel.org/stable/c/4582949b7badcb91bb537ca522d69b8a35131e72"},{"url":"https://git.kernel.org/stable/c/bf85bd6e550c17ffa585606fcc18eb5b7c95bbce"},{"url":"https://git.kernel.org/stable/c/628b6fee9fca292f12d07f0f1bcf1edefa949d81"}],"title":"clk: meson: align gxbb_32k_clk_sel number of parents with actual count","x_generator":{"engine":"bippy-1.2.0"}}}}