{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-98501", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.353Z", "datePublished": "2026-10-18T15:16:46.205Z", "dateUpdated": "2026-10-24T14:09:09.356Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-24T14:09:09.356Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nHID: alps: fix use-after-free on input2 registration failure\n\nalps_input_configured() stores data->input2 before calling\ninput_register_device(). If registration fails, input_free_device()\nfrees the input device but data->input2 still points to the freed memory.\nalps_input_configured() calls hid_hw_open() before allocating input2, so\nURBs are already active and raw_event can fire during the failure window.\nA U1_SP_ABSOLUTE_REPORT_ID report arriving then causes u1_raw_event()\nto dereference the freed data->input2 -> use-after-free.\n\nFix by only storing input2 into drvdata after successful registration\nand adding a NULL guard in the raw_event path." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H", "baseScore": 7.1, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:A - `alps_id` uses `HID_BUS_ANY`, so a Bluetooth HIDP peer can bind `hid-alps`; its L2CAP ID-6 report follows `hidp_process_report()->hid_input_report()->alps_raw_event()->u1_raw_event()`, which dereferences the pointer left stale by `alps_input_configured()`.\nAC:H - The peer controls stick support and ID-6 report timing, and asynchronous `hidp_session_dev_work()` permits concurrency, but it cannot force `input_register_device(input2)` to fail; that requires a host-side allocation, device-model, or lock-interruption failure.\nPR:N - After the HIDP session is established, `hidp_session_run()` passes peer-supplied interrupt-channel reports to `hid_input_report()` without any per-report host privilege check; the nearby peer needs no kernel credential.\nUI:R - The victim must pair or connect the attacker's spoofed ALPS Bluetooth HID peer so BlueZ establishes the HIDP session and `hid-alps` probes it; subsequent triggering reports need no further action.\nS:U - The stale `data->input2` and the memory corrupted through it are host-kernel input-core objects; `u1_raw_event()` crosses no VM, IOMMU, or other security-authority boundary.\nC:H - The freed `struct input_dev` contains `vals`, `grab`, and handler-list pointers; after heap reuse, ID-6 reports drive `input_event()` and `input_pass_values()` through attacker-influenced reclaimed fields, permitting arbitrary kernel-memory disclosure.\nI:H - `input_event_dispose()` writes attacker-selected relative and button values through the reclaimed `input_dev->vals` pointer, while `input_pass_values()` follows reclaimed handler pointers, supporting arbitrary writes and control-flow hijacking.\nA:H - `u1_raw_event()` passes the freed pointer to `input_event()`, which reads `evbit`, takes `event_lock`, and accesses `vals` and handler lists; invalid reclaimed state can immediately cause an oops, panic, or lockup." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/hid/hid-alps.c" ], "versions": [ { "version": "2562756dde550901c224e3805102bdfc17e7d13a", "lessThan": "64f824dccfd316fd3db8ea1cc4e8a76ad6a02740", "status": "affected", "versionType": "git" }, { "version": "2562756dde550901c224e3805102bdfc17e7d13a", "lessThan": "2e55d76e6e8a756f6d87c241de975599f82b02fa", "status": "affected", "versionType": "git" }, { "version": "2562756dde550901c224e3805102bdfc17e7d13a", "lessThan": "ef8ca5bb4c8b9696f38b1bebce1c851baa02b77b", "status": "affected", "versionType": "git" }, { "version": "2562756dde550901c224e3805102bdfc17e7d13a", "lessThan": "5a8ad63158165bacd6a1d7420e0fe5364c913b06", "status": "affected", "versionType": "git" }, { "version": "2562756dde550901c224e3805102bdfc17e7d13a", "lessThan": "47e5e177e9e4e10da6f2759d5ce8d049e33efdc4", "status": "affected", "versionType": "git" }, { "version": "2562756dde550901c224e3805102bdfc17e7d13a", "lessThan": "925da1d2a24787f24872de13a4680437c54de179", "status": "affected", "versionType": "git" }, { "version": "2562756dde550901c224e3805102bdfc17e7d13a", "lessThan": "443f6b93442b10b972a16f57ceaaea75b77892b6", "status": "affected", "versionType": "git" }, { "version": "2562756dde550901c224e3805102bdfc17e7d13a", "lessThan": "d3aba3442798ce4a4c8ce3104d7b286d61e605f9", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/hid/hid-alps.c" ], "versions": [ { "version": "4.8", "status": "affected" }, { "version": "0", "lessThan": "4.8", "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": "6.18.55", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.2.9", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.3", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "5.10.271" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "5.15.222" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "6.1.189" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "6.6.158" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "6.12.112" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "6.18.55" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "7.2.9" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.8", "versionEndExcluding": "7.3" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/64f824dccfd316fd3db8ea1cc4e8a76ad6a02740" }, { "url": "https://git.kernel.org/stable/c/2e55d76e6e8a756f6d87c241de975599f82b02fa" }, { "url": "https://git.kernel.org/stable/c/ef8ca5bb4c8b9696f38b1bebce1c851baa02b77b" }, { "url": "https://git.kernel.org/stable/c/5a8ad63158165bacd6a1d7420e0fe5364c913b06" }, { "url": "https://git.kernel.org/stable/c/47e5e177e9e4e10da6f2759d5ce8d049e33efdc4" }, { "url": "https://git.kernel.org/stable/c/925da1d2a24787f24872de13a4680437c54de179" }, { "url": "https://git.kernel.org/stable/c/443f6b93442b10b972a16f57ceaaea75b77892b6" }, { "url": "https://git.kernel.org/stable/c/d3aba3442798ce4a4c8ce3104d7b286d61e605f9" } ], "title": "HID: alps: fix use-after-free on input2 registration failure", "x_generator": { "engine": "bippy-1.2.0" } } } }