{"id":"CVE-2025-40035","state":"PUBLISHED","title":"Input: uinput - zero-initialize uinput_ff_upload_compat to avoid info leak","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nInput: uinput - zero-initialize uinput_ff_upload_compat to avoid info leak\n\nStruct ff_effect_compat is embedded twice inside\nuinput_ff_upload_compat, contains internal padding. In particular, there\nis a hole after struct ff_replay to satisfy alignment requirements for\nthe following union member. Without clearing the structure,\ncopy_to_user() may leak stack data to userspace.\n\nInitialize ff_up_compat to zero before filling valid fields.","publishedAt":"2025-10-28T11:48:17.030Z","updatedAt":"2026-05-11T21:41:13.342Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"2d56f3a32c0e62f99c043d2579840f9731fe5855","status":"affected","lessThan":"1b317796013f666ae5040edbf0f230ec61496d42","versionType":"git"},{"version":"2d56f3a32c0e62f99c043d2579840f9731fe5855","status":"affected","lessThan":"877172b97786ed1678640dff0b2d35abb328844c","versionType":"git"},{"version":"2d56f3a32c0e62f99c043d2579840f9731fe5855","status":"affected","lessThan":"e63aade22a33e77b93c98c9f02db504d897a76b4","versionType":"git"},{"version":"2d56f3a32c0e62f99c043d2579840f9731fe5855","status":"affected","lessThan":"933b87c4590b42500299f00ff55f555903056803","versionType":"git"},{"version":"2d56f3a32c0e62f99c043d2579840f9731fe5855","status":"affected","lessThan":"fd8a23ecbc602d00e47b27f20b07350867d0ebe5","versionType":"git"},{"version":"2d56f3a32c0e62f99c043d2579840f9731fe5855","status":"affected","lessThan":"48c96b7e9e03516936d6deba54b5553097eae817","versionType":"git"},{"version":"2d56f3a32c0e62f99c043d2579840f9731fe5855","status":"affected","lessThan":"f5e1f3b85aadce74268c46676772c3e9fa79897e","versionType":"git"},{"version":"2d56f3a32c0e62f99c043d2579840f9731fe5855","status":"affected","lessThan":"d3366a04770eea807f2826cbdb96934dd8c9bf79","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/input/misc/uinput.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.29","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.29","versionType":"semver"},{"version":"5.4.301","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.246","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.195","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.156","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.112","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.53","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.17.3","status":"unaffected","lessThanOrEqual":"6.17.*","versionType":"semver"},{"version":"6.18","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/input/misc/uinput.c"]}],"references":["https://git.kernel.org/stable/c/1b317796013f666ae5040edbf0f230ec61496d42","https://git.kernel.org/stable/c/877172b97786ed1678640dff0b2d35abb328844c","https://git.kernel.org/stable/c/e63aade22a33e77b93c98c9f02db504d897a76b4","https://git.kernel.org/stable/c/933b87c4590b42500299f00ff55f555903056803","https://git.kernel.org/stable/c/fd8a23ecbc602d00e47b27f20b07350867d0ebe5","https://git.kernel.org/stable/c/48c96b7e9e03516936d6deba54b5553097eae817","https://git.kernel.org/stable/c/f5e1f3b85aadce74268c46676772c3e9fa79897e","https://git.kernel.org/stable/c/d3366a04770eea807f2826cbdb96934dd8c9bf79"],"weaknesses":[],"ingestedAt":"2026-10-29T20:09:09.358Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/40xxx/CVE-2025-40035.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-40035","state":"PUBLISHED","datePublished":"2025-10-28T11:48:17.030Z","dateUpdated":"2026-05-11T21:41:13.342Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-04-16T07:20:57.153Z"},"containers":{"cna":{"title":"Input: uinput - zero-initialize uinput_ff_upload_compat to avoid info leak","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nInput: uinput - zero-initialize uinput_ff_upload_compat to avoid info leak\n\nStruct ff_effect_compat is embedded twice inside\nuinput_ff_upload_compat, contains internal padding. In particular, there\nis a hole after struct ff_replay to satisfy alignment requirements for\nthe following union member. Without clearing the structure,\ncopy_to_user() may leak stack data to userspace.\n\nInitialize ff_up_compat to zero before filling valid fields."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"2d56f3a32c0e62f99c043d2579840f9731fe5855","status":"affected","lessThan":"1b317796013f666ae5040edbf0f230ec61496d42","versionType":"git"},{"version":"2d56f3a32c0e62f99c043d2579840f9731fe5855","status":"affected","lessThan":"877172b97786ed1678640dff0b2d35abb328844c","versionType":"git"},{"version":"2d56f3a32c0e62f99c043d2579840f9731fe5855","status":"affected","lessThan":"e63aade22a33e77b93c98c9f02db504d897a76b4","versionType":"git"},{"version":"2d56f3a32c0e62f99c043d2579840f9731fe5855","status":"affected","lessThan":"933b87c4590b42500299f00ff55f555903056803","versionType":"git"},{"version":"2d56f3a32c0e62f99c043d2579840f9731fe5855","status":"affected","lessThan":"fd8a23ecbc602d00e47b27f20b07350867d0ebe5","versionType":"git"},{"version":"2d56f3a32c0e62f99c043d2579840f9731fe5855","status":"affected","lessThan":"48c96b7e9e03516936d6deba54b5553097eae817","versionType":"git"},{"version":"2d56f3a32c0e62f99c043d2579840f9731fe5855","status":"affected","lessThan":"f5e1f3b85aadce74268c46676772c3e9fa79897e","versionType":"git"},{"version":"2d56f3a32c0e62f99c043d2579840f9731fe5855","status":"affected","lessThan":"d3366a04770eea807f2826cbdb96934dd8c9bf79","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/input/misc/uinput.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.29","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.29","versionType":"semver"},{"version":"5.4.301","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.246","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.195","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.156","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.112","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.53","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.17.3","status":"unaffected","lessThanOrEqual":"6.17.*","versionType":"semver"},{"version":"6.18","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/input/misc/uinput.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/1b317796013f666ae5040edbf0f230ec61496d42"},{"url":"https://git.kernel.org/stable/c/877172b97786ed1678640dff0b2d35abb328844c"},{"url":"https://git.kernel.org/stable/c/e63aade22a33e77b93c98c9f02db504d897a76b4"},{"url":"https://git.kernel.org/stable/c/933b87c4590b42500299f00ff55f555903056803"},{"url":"https://git.kernel.org/stable/c/fd8a23ecbc602d00e47b27f20b07350867d0ebe5"},{"url":"https://git.kernel.org/stable/c/48c96b7e9e03516936d6deba54b5553097eae817"},{"url":"https://git.kernel.org/stable/c/f5e1f3b85aadce74268c46676772c3e9fa79897e"},{"url":"https://git.kernel.org/stable/c/d3366a04770eea807f2826cbdb96934dd8c9bf79"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T21:41:13.342Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.29","versionEndExcluding":"5.4.301"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.29","versionEndExcluding":"5.10.246"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.29","versionEndExcluding":"5.15.195"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.29","versionEndExcluding":"6.1.156"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.29","versionEndExcluding":"6.6.112"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.29","versionEndExcluding":"6.12.53"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.29","versionEndExcluding":"6.17.3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.29","versionEndExcluding":"6.18"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}