{"id":"CVE-2026-93263","summary":"clk: eswin: Zero-initialize stack-allocated clk_init_data","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nclk: eswin: Zero-initialize stack-allocated clk_init_data\n\neswin_clk_register_pll() and eswin_register_clkdiv() declare a struct\nclk_init_data on the stack and only initialize some of its fields\n(parent_data respectively parent_hws). clk_core_populate_parent_map()\nchecks parent_names first and parent_data second before falling back\nto parent_hws, so leftover stack garbage in the uninitialized fields\nhijacks parent resolution and the clk core dereferences a bogus\npointer:\n\n  Unable to handle kernel NULL pointer dereference at virtual address 000000000000000c\n  Oops [#1]\n  epc : __clk_register+0x31a/0x7f0\n  [\u003cffffffff805dc774\u003e] __clk_register+0x31a/0x7f0\n  [\u003cffffffff805dcd76\u003e] devm_clk_hw_register+0x2a/0x94\n  [\u003cffffffff805e319a\u003e] eswin_register_clkdiv+0x80/0xd0\n  [\u003cffffffff805e34a0\u003e] eswin_clk_register_clks+0x162/0x1a0\n  [\u003cffffffff805e3736\u003e] eic7700_clk_probe+0x146/0x180\n  [\u003cffffffff8065d23c\u003e] platform_probe+0x3c/0x7a\n\nObserved on EIC7700 hardware (with the driver backported to a 6.17\ntree); whether the bug triggers depends entirely on what the stack\nhappens to contain when the registration helpers run.\n\nZero-initialize both structures.","modified":"2026-09-25T03:48:54.474077716Z","published":"2026-09-24T15:52:02.877Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93263.json"},"references":[{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"},{"type":"WEB","url":"https://git.kernel.org/stable/c/011d8de504bc84402aabc1dda1cf0552fe9a5af2"},{"type":"WEB","url":"https://git.kernel.org/stable/c/1183dc2450a268a536a15da8b106ec520cdbd19f"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/93xxx/CVE-2026-93263.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-93263"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"cd44f127c1d42833a32ba0a0965255ee6184f8c1"},{"fixed":"1183dc2450a268a536a15da8b106ec520cdbd19f"},{"fixed":"011d8de504bc84402aabc1dda1cf0552fe9a5af2"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-93263.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"7.1.0"},{"fixed":"7.2.6"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-93263.json"}}],"schema_version":"1.9.0"}