{"id":"CVE-2026-98201","revision":"7cd2a388a0c84201b4be7963b386a8b5","records":[{"revision":"7cd2a388a0c84201b4be7963b386a8b5","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-98201","aliases":[],"title":"Input: zero ff_effect before compat copy in input_ff_effect_from_user","description":"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.","state":0,"publishedAt":"2026-10-06T08:44:38.952+00:00","modifiedAt":"2026-10-19T09:15:32.269+00:00","affected":[{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/input/input-compat.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"2d56f3a32c0e62f99c043d2579840f9731fe5855\",\n                            \"lessThan\": \"ed0905fda39682d3da7937184397d3276abbffa8\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"2d56f3a32c0e62f99c043d2579840f9731fe5855\",\n                            \"lessThan\": \"ec174c2ab1abb76b20fa167c6db848c3d97aa838\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"2d56f3a32c0e62f99c043d2579840f9731fe5855\",\n                            \"lessThan\": \"6c26681c5668c973bd0e951407d670ac60d9cd66\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"2d56f3a32c0e62f99c043d2579840f9731fe5855\",\n                            \"lessThan\": \"c5e573bb095d502be7cbbaa99c26a20984111c6d\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"2d56f3a32c0e62f99c043d2579840f9731fe5855\",\n                            \"lessThan\": \"b878720e8bcaa4cf7163a5081f904dd6baf11b2c\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"2d56f3a32c0e62f99c043d2579840f9731fe5855\",\n                            \"lessThan\": \"0d05b43b55d4784a42ce8fb318175f8ad7d9af5a\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"2d56f3a32c0e62f99c043d2579840f9731fe5855\",\n                            \"lessThan\": \"ed0406e490f48ed180df140fe2a81be26bccb1a9\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        },\n                        {\n                            \"version\": \"2d56f3a32c0e62f99c043d2579840f9731fe5855\",\n                            \"lessThan\": \"f84819ef8d66931ee3998fee3c4f03230f4cb6cc\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"git\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"Linux","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"product\": \"Linux\",\n                    \"vendor\": \"Linux\",\n                    \"defaultStatus\": \"affected\",\n                    \"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\n                    \"programFiles\": [\n                        \"drivers/input/input-compat.c\"\n                    ],\n                    \"versions\": [\n                        {\n                            \"version\": \"2.6.29\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \"0\",\n                            \"lessThan\": \"2.6.29\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.10.271\",\n                            \"lessThanOrEqual\": \"5.10.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"5.15.222\",\n                            \"lessThanOrEqual\": \"5.15.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.1.189\",\n                            \"lessThanOrEqual\": \"6.1.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.6.158\",\n                            \"lessThanOrEqual\": \"6.6.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.12.112\",\n                            \"lessThanOrEqual\": \"6.12.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"6.18.54\",\n                            \"lessThanOrEqual\": \"6.18.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.2.8\",\n                            \"lessThanOrEqual\": \"7.2.*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        },\n                        {\n                            \"version\": \"7.3\",\n                            \"lessThanOrEqual\": \"*\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"original_commit_for_fix\"\n                        }\n                    ]\n                }"}],"metrics":[],"references":["https://git.kernel.org/stable/c/ed0905fda39682d3da7937184397d3276abbffa8","https://git.kernel.org/stable/c/ec174c2ab1abb76b20fa167c6db848c3d97aa838","https://git.kernel.org/stable/c/6c26681c5668c973bd0e951407d670ac60d9cd66","https://git.kernel.org/stable/c/c5e573bb095d502be7cbbaa99c26a20984111c6d","https://git.kernel.org/stable/c/b878720e8bcaa4cf7163a5081f904dd6baf11b2c","https://git.kernel.org/stable/c/0d05b43b55d4784a42ce8fb318175f8ad7d9af5a","https://git.kernel.org/stable/c/ed0406e490f48ed180df140fe2a81be26bccb1a9","https://git.kernel.org/stable/c/f84819ef8d66931ee3998fee3c4f03230f4cb6cc"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-98201","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-98201","identifiers":["CVE-2026-98201"]},"retained":false,"historicalAffected":[]}],"coverage":[]}