{"id":"CVE-2026-93263","state":"PUBLISHED","title":"clk: eswin: Zero-initialize stack-allocated clk_init_data","description":"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 [] __clk_register+0x31a/0x7f0\n [] devm_clk_hw_register+0x2a/0x94\n [] eswin_register_clkdiv+0x80/0xd0\n [] eswin_clk_register_clks+0x162/0x1a0\n [] eic7700_clk_probe+0x146/0x180\n [] 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.","publishedAt":"2026-09-24T15:52:02.877Z","updatedAt":"2026-10-19T09:08:16.442Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"cd44f127c1d42833a32ba0a0965255ee6184f8c1","status":"affected","lessThan":"1183dc2450a268a536a15da8b106ec520cdbd19f","versionType":"git"},{"version":"cd44f127c1d42833a32ba0a0965255ee6184f8c1","status":"affected","lessThan":"011d8de504bc84402aabc1dda1cf0552fe9a5af2","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/clk/eswin/clk.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"7.1","status":"affected"},{"version":"0","status":"unaffected","lessThan":"7.1","versionType":"semver"},{"version":"7.2.6","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/clk/eswin/clk.c"]}],"references":["https://git.kernel.org/stable/c/1183dc2450a268a536a15da8b106ec520cdbd19f","https://git.kernel.org/stable/c/011d8de504bc84402aabc1dda1cf0552fe9a5af2"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:34.582Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/93xxx/CVE-2026-93263.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-93263","state":"PUBLISHED","datePublished":"2026-09-24T15:52:02.877Z","dateUpdated":"2026-10-19T09:08:16.442Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-17T16:02:15.097Z"},"containers":{"cna":{"title":"clk: eswin: Zero-initialize stack-allocated clk_init_data","descriptions":[{"lang":"en","value":"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 [] __clk_register+0x31a/0x7f0\n [] devm_clk_hw_register+0x2a/0x94\n [] eswin_register_clkdiv+0x80/0xd0\n [] eswin_clk_register_clks+0x162/0x1a0\n [] eic7700_clk_probe+0x146/0x180\n [] 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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"cd44f127c1d42833a32ba0a0965255ee6184f8c1","status":"affected","lessThan":"1183dc2450a268a536a15da8b106ec520cdbd19f","versionType":"git"},{"version":"cd44f127c1d42833a32ba0a0965255ee6184f8c1","status":"affected","lessThan":"011d8de504bc84402aabc1dda1cf0552fe9a5af2","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/clk/eswin/clk.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"7.1","status":"affected"},{"version":"0","status":"unaffected","lessThan":"7.1","versionType":"semver"},{"version":"7.2.6","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/clk/eswin/clk.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/1183dc2450a268a536a15da8b106ec520cdbd19f"},{"url":"https://git.kernel.org/stable/c/011d8de504bc84402aabc1dda1cf0552fe9a5af2"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T09:08:16.442Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"7.1","versionEndExcluding":"7.2.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"7.1","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}