{"id":"CVE-2026-93263","title":"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 ini…","summary":"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 ini…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= cd44f127c1d42833a32ba0a0965255ee6184f8c1 < 1183dc2450a268a536a15da8b106ec520cdbd19f","Linux >= cd44f127c1d42833a32ba0a0965255ee6184f8c1 < 011d8de504bc84402aabc1dda1cf0552fe9a5af2","Linux 7.1"],"published":"2026-09-24","updated":"2026-09-24","sourceUpdated":"2026-09-24T16:17:23.067","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-93263","references":[{"url":"https://git.kernel.org/stable/c/011d8de504bc84402aabc1dda1cf0552fe9a5af2","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/1183dc2450a268a536a15da8b106ec520cdbd19f","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-24T16:47:15.836Z","slug":"CVE-2026-93263","body":"## Overview\n\nIn 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  [<ffffffff805dc774>] __clk_register+0x31a/0x7f0\n  [<ffffffff805dcd76>] devm_clk_hw_register+0x2a/0x94\n  [<ffffffff805e319a>] eswin_register_clkdiv+0x80/0xd0\n  [<ffffffff805e34a0>] eswin_clk_register_clks+0x162/0x1a0\n  [<ffffffff805e3736>] eic7700_clk_probe+0x146/0x180\n  [<ffffffff8065d23c>] 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}