{"id":"CVE-2026-80918","state":"PUBLISHED","title":"HID: core: fix number/pointer type confusion on long items","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nHID: core: fix number/pointer type confusion on long items\n\nWhen fetch_item() is called by hid_scan_report() on an item with\nHID_ITEM_TAG_LONG, it stores a pointer to the item data in\nitem->data.longdata instead of storing a value directly in\nitem->data.{u8/u16/u32}.\n\nWhen item_udata() or item_sdata() encounters such an item, it incorrectly\nassumes that the item is in short format, and therefore returns the lower\npart of a kernel pointer reinterpreted as a number.\n\nWhen a HID device is connected whose descriptor contains a\nHID_GLOBAL_ITEM_TAG_REPORT_SIZE encoded in long format with size=4, this\ncauses the lower half of a kernel pointer to be printed into dmesg as a\nnumber, like this:\n\n    hid (null): invalid report_size 107953555\n\nTo fix it, let item_udata() and item_sdata() verify that the item is in\nshort format.\n\nNote that this bug only affects hid_scan_report(), while the main parsing\npass hid_parse_collections() will always bail out when encountering a long\nitem.\n\nSidenote: There are currently no users of data.longdata; maybe we should\njust remove any parsing of long-format descriptors as a follow-up.","publishedAt":"2026-09-09T16:13:15.799Z","updatedAt":"2026-10-19T08:45:02.656Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"3dc8fc083dbfeede7b63a0c07581192e97711365","status":"affected","lessThan":"bed7fe3a936b6bdd84671385951397ca673cf6e7","versionType":"git"},{"version":"3dc8fc083dbfeede7b63a0c07581192e97711365","status":"affected","lessThan":"aec2c2ec87d4ec1f098979f68cd81b29f031c8cb","versionType":"git"},{"version":"3dc8fc083dbfeede7b63a0c07581192e97711365","status":"affected","lessThan":"634f498ea5d5e8e01f8d9414d4f45eeaf9ee1996","versionType":"git"},{"version":"3dc8fc083dbfeede7b63a0c07581192e97711365","status":"affected","lessThan":"abec577de5fc16cd5caae42f97cdcd0983c06d66","versionType":"git"},{"version":"3dc8fc083dbfeede7b63a0c07581192e97711365","status":"affected","lessThan":"dd8035dec26e98204d6e4a6e0cee5c4d329b3d7e","versionType":"git"},{"version":"3dc8fc083dbfeede7b63a0c07581192e97711365","status":"affected","lessThan":"1fa1591efd417e39e5e164bebea8ca7a3837c469","versionType":"git"},{"version":"3dc8fc083dbfeede7b63a0c07581192e97711365","status":"affected","lessThan":"e60159f5ea60254a5c3de4ea4f2f939f0171031b","versionType":"git"},{"version":"3dc8fc083dbfeede7b63a0c07581192e97711365","status":"affected","lessThan":"e542edada3f79387c0ac2a528cebf01f4ef47df8","versionType":"git"},{"version":"3dc8fc083dbfeede7b63a0c07581192e97711365","status":"affected","lessThan":"28abce951343fcec26e397610868efa4e1395c3f","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/hid/hid-core.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.12","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.12","versionType":"semver"},{"version":"5.10.267","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.218","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.185","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.154","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.106","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.47","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.11","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2.1","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/hid/hid-core.c"]}],"references":["https://git.kernel.org/stable/c/bed7fe3a936b6bdd84671385951397ca673cf6e7","https://git.kernel.org/stable/c/aec2c2ec87d4ec1f098979f68cd81b29f031c8cb","https://git.kernel.org/stable/c/634f498ea5d5e8e01f8d9414d4f45eeaf9ee1996","https://git.kernel.org/stable/c/abec577de5fc16cd5caae42f97cdcd0983c06d66","https://git.kernel.org/stable/c/dd8035dec26e98204d6e4a6e0cee5c4d329b3d7e","https://git.kernel.org/stable/c/1fa1591efd417e39e5e164bebea8ca7a3837c469","https://git.kernel.org/stable/c/e60159f5ea60254a5c3de4ea4f2f939f0171031b","https://git.kernel.org/stable/c/e542edada3f79387c0ac2a528cebf01f4ef47df8","https://git.kernel.org/stable/c/28abce951343fcec26e397610868efa4e1395c3f"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:07.220Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/80xxx/CVE-2026-80918.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-80918","state":"PUBLISHED","datePublished":"2026-09-09T16:13:15.799Z","dateUpdated":"2026-10-19T08:45:02.656Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-08-26T14:34:25.801Z"},"containers":{"cna":{"title":"HID: core: fix number/pointer type confusion on long items","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nHID: core: fix number/pointer type confusion on long items\n\nWhen fetch_item() is called by hid_scan_report() on an item with\nHID_ITEM_TAG_LONG, it stores a pointer to the item data in\nitem->data.longdata instead of storing a value directly in\nitem->data.{u8/u16/u32}.\n\nWhen item_udata() or item_sdata() encounters such an item, it incorrectly\nassumes that the item is in short format, and therefore returns the lower\npart of a kernel pointer reinterpreted as a number.\n\nWhen a HID device is connected whose descriptor contains a\nHID_GLOBAL_ITEM_TAG_REPORT_SIZE encoded in long format with size=4, this\ncauses the lower half of a kernel pointer to be printed into dmesg as a\nnumber, like this:\n\n    hid (null): invalid report_size 107953555\n\nTo fix it, let item_udata() and item_sdata() verify that the item is in\nshort format.\n\nNote that this bug only affects hid_scan_report(), while the main parsing\npass hid_parse_collections() will always bail out when encountering a long\nitem.\n\nSidenote: There are currently no users of data.longdata; maybe we should\njust remove any parsing of long-format descriptors as a follow-up."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"3dc8fc083dbfeede7b63a0c07581192e97711365","status":"affected","lessThan":"bed7fe3a936b6bdd84671385951397ca673cf6e7","versionType":"git"},{"version":"3dc8fc083dbfeede7b63a0c07581192e97711365","status":"affected","lessThan":"aec2c2ec87d4ec1f098979f68cd81b29f031c8cb","versionType":"git"},{"version":"3dc8fc083dbfeede7b63a0c07581192e97711365","status":"affected","lessThan":"634f498ea5d5e8e01f8d9414d4f45eeaf9ee1996","versionType":"git"},{"version":"3dc8fc083dbfeede7b63a0c07581192e97711365","status":"affected","lessThan":"abec577de5fc16cd5caae42f97cdcd0983c06d66","versionType":"git"},{"version":"3dc8fc083dbfeede7b63a0c07581192e97711365","status":"affected","lessThan":"dd8035dec26e98204d6e4a6e0cee5c4d329b3d7e","versionType":"git"},{"version":"3dc8fc083dbfeede7b63a0c07581192e97711365","status":"affected","lessThan":"1fa1591efd417e39e5e164bebea8ca7a3837c469","versionType":"git"},{"version":"3dc8fc083dbfeede7b63a0c07581192e97711365","status":"affected","lessThan":"e60159f5ea60254a5c3de4ea4f2f939f0171031b","versionType":"git"},{"version":"3dc8fc083dbfeede7b63a0c07581192e97711365","status":"affected","lessThan":"e542edada3f79387c0ac2a528cebf01f4ef47df8","versionType":"git"},{"version":"3dc8fc083dbfeede7b63a0c07581192e97711365","status":"affected","lessThan":"28abce951343fcec26e397610868efa4e1395c3f","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/hid/hid-core.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"3.12","status":"affected"},{"version":"0","status":"unaffected","lessThan":"3.12","versionType":"semver"},{"version":"5.10.267","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.218","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.185","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.154","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.106","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.47","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.11","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2.1","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/hid/hid-core.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/bed7fe3a936b6bdd84671385951397ca673cf6e7"},{"url":"https://git.kernel.org/stable/c/aec2c2ec87d4ec1f098979f68cd81b29f031c8cb"},{"url":"https://git.kernel.org/stable/c/634f498ea5d5e8e01f8d9414d4f45eeaf9ee1996"},{"url":"https://git.kernel.org/stable/c/abec577de5fc16cd5caae42f97cdcd0983c06d66"},{"url":"https://git.kernel.org/stable/c/dd8035dec26e98204d6e4a6e0cee5c4d329b3d7e"},{"url":"https://git.kernel.org/stable/c/1fa1591efd417e39e5e164bebea8ca7a3837c469"},{"url":"https://git.kernel.org/stable/c/e60159f5ea60254a5c3de4ea4f2f939f0171031b"},{"url":"https://git.kernel.org/stable/c/e542edada3f79387c0ac2a528cebf01f4ef47df8"},{"url":"https://git.kernel.org/stable/c/28abce951343fcec26e397610868efa4e1395c3f"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T08:45:02.656Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.12","versionEndExcluding":"5.10.267"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.12","versionEndExcluding":"5.15.218"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.12","versionEndExcluding":"6.1.185"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.12","versionEndExcluding":"6.6.154"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.12","versionEndExcluding":"6.12.106"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.12","versionEndExcluding":"6.18.47"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.12","versionEndExcluding":"7.1.11"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.12","versionEndExcluding":"7.2.1"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"3.12","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}