{"schema":"threatline.record/2","record":{"id":"CVE-2026-98201","aliases":[],"summary":"Input: zero ff_effect before compat copy in input_ff_effect_from_user","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nInput: zero ff_effect before compat copy in input_ff_effect_from_user\n\nIn the compat path input_ff_effect_from_user() aliases the caller's\nnative struct ff_effect with the smaller struct ff_effect_compat and\ncopies only the compat sized prefix:\n\n\tcompat_effect = (struct ff_effect_compat *)effect;\n\n\tif (copy_from_user(compat_effect, buffer,\n\t\t\t   sizeof(struct ff_effect_compat)))\n\nThe tail of the native structure is never written. Callers pass an\nuninitialized on-stack object, for example evdev_do_ioctl() for\nEVIOCSFF, so those bytes keep their previous stack contents.\ninput_ff_upload() then stores the full native structure in\nff->effects[id], from where a uinput based force feedback daemon can\nread it back via UI_BEGIN_FF_UPLOAD, disclosing kernel stack memory to\nuserspace.\n\nZero the effect before the compat copy.","categories":["Operating systems"],"product":"Linux","vendor":"Linux","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98201","source_modified_at":"2026-10-19T09:15:32.269Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"2d56f3a32c0e62f99c043d2579840f9731fe5855","lessThan":"ed0905fda39682d3da7937184397d3276abbffa8","status":"affected","versionType":"git"},{"version":"2d56f3a32c0e62f99c043d2579840f9731fe5855","lessThan":"ec174c2ab1abb76b20fa167c6db848c3d97aa838","status":"affected","versionType":"git"},{"version":"2d56f3a32c0e62f99c043d2579840f9731fe5855","lessThan":"6c26681c5668c973bd0e951407d670ac60d9cd66","status":"affected","versionType":"git"},{"version":"2d56f3a32c0e62f99c043d2579840f9731fe5855","lessThan":"c5e573bb095d502be7cbbaa99c26a20984111c6d","status":"affected","versionType":"git"},{"version":"2d56f3a32c0e62f99c043d2579840f9731fe5855","lessThan":"b878720e8bcaa4cf7163a5081f904dd6baf11b2c","status":"affected","versionType":"git"},{"version":"2d56f3a32c0e62f99c043d2579840f9731fe5855","lessThan":"0d05b43b55d4784a42ce8fb318175f8ad7d9af5a","status":"affected","versionType":"git"},{"version":"2d56f3a32c0e62f99c043d2579840f9731fe5855","lessThan":"ed0406e490f48ed180df140fe2a81be26bccb1a9","status":"affected","versionType":"git"},{"version":"2d56f3a32c0e62f99c043d2579840f9731fe5855","lessThan":"f84819ef8d66931ee3998fee3c4f03230f4cb6cc","status":"affected","versionType":"git"}],"defaultStatus":"unaffected"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98201","source_modified_at":"2026-10-19T09:15:32.269Z","fetched_at":"2026-10-23T18:45:31.882637Z","product":"Linux","vendor":"Linux","versions":[{"version":"2.6.29","status":"affected"},{"version":"0","lessThan":"2.6.29","status":"unaffected","versionType":"semver"},{"version":"5.10.271","lessThanOrEqual":"5.10.*","status":"unaffected","versionType":"semver"},{"version":"5.15.222","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.189","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.158","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.112","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.54","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.2.8","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}],"defaultStatus":"affected"}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98201","source_modified_at":"2026-10-19T09:15:32.269Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"6c26681c5668c973bd0e951407d670ac60d9cd66","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-98201","source_modified_at":"2026-10-19T09:15:32.269Z","fetched_at":"2026-10-23T18:45:31.882637Z","package":{"name":"Linux","ecosystem":null},"version":"0d05b43b55d4784a42ce8fb318175f8ad7d9af5a","basis":"first unaffected version stated in the CVE record"}],"cvss":null,"severity":null,"kev":{"listed":false},"epss":{"probability":0.00184,"percentile":0.07611,"score_date":"2026-10-23"},"published_at":"2026-10-06T08:44:38.952Z","modified_at":"2026-10-19T09:15:32.269Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-98201","fetched_at":"2026-10-23T18:45:31.882637Z","source_modified_at":"2026-10-19T09:15:32.269Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-98201","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://git.kernel.org/stable/c/ed0905fda39682d3da7937184397d3276abbffa8"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/ec174c2ab1abb76b20fa167c6db848c3d97aa838"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/6c26681c5668c973bd0e951407d670ac60d9cd66"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/c5e573bb095d502be7cbbaa99c26a20984111c6d"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/b878720e8bcaa4cf7163a5081f904dd6baf11b2c"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/0d05b43b55d4784a42ce8fb318175f8ad7d9af5a"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/ed0406e490f48ed180df140fe2a81be26bccb1a9"},{"source":"CVE List","url":"https://git.kernel.org/stable/c/f84819ef8d66931ee3998fee3c4f03230f4cb6cc"}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-19T09:15:32.269Z","content_hash":"ab8b4978d7219ac8f4560a5c195c608b54878885f96eea02c2c3d57edf114ab1"}}