{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-98499", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.353Z", "datePublished": "2026-10-18T15:16:31.629Z", "dateUpdated": "2026-10-24T14:09:08.254Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-24T14:09:08.254Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nHID: wacom: fix OOB read in wacom_wac_pen_serial_enforce()\n\nThe 'wacom_wac_pen_serial_enforce()' function may calculate and pass an\ninvalid offset to hid_field_extract(), resulting in memory reads at\nincorrect addresses -- possibly beyond the end of the report. If a\nfield in the HID descriptor lists more usages than its Report Count\nactually reserves space for, the function's inner 'j' will walk past\nthe end of the field:\n\n\tfor (i = 0; i < report->maxfield; i++) {\n\t\tfor (j = 0; j < report->field[i]->maxusage; j++) {\n\t\t\t...\n\t\t\tvalue = hid_field_extract(hdev, raw_data + 1,\n\t\t\t\t\t\t offset + j * size, size);\n\nA descriptor listing 12288 usages against Report Count 1 has the loop\nextract the usage at index 12287 from bit offset 98296 -- about 12 KB\npast a 2-byte received report. The value is stored in\nwacom_wac->serial[0] and can reach userspace as an MSC_SERIAL event,\nmaking this an information disclosure.\n\nClamp the loop to field->report_count, the number of value slots the\nreport holds. Value slots past the last declared usage are still\nscanned; they reuse that usage (HID 1.11, 6.2.2.8).\n\nVerified on v6.12.105 with a UHID reproducer: a 2-byte report from\nsuch a descriptor trips KASAN before the patch and not after it." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H", "baseScore": 8.1, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:A - wacom_ids binds BT_DEVICE_WACOM(HID_ANY_ID), so an adjacent peer can supply a Wacom-VID HID descriptor with excess usages. Its HIDP input packet follows hidp_recv_intr_frame() through hid_input_report() and wacom_raw_event() to wacom_wac_pen_serial_enforce().\nAC:L - The peer chooses the descriptor mismatch, such as maxusage 12288 with report_count 1, then sends one 2-byte input report; the loop deterministically computes bit offset 98296 without a race or condition outside the peer's control.\nPR:N - No credential or capability check exists in hidp_recv_intr_frame(), hid_input_report(), wacom_raw_event(), or the patched function. CAP_NET_ADMIN in HIDPCONNADD applies to the local Bluetooth manager creating the session, not the adjacent peer.\nUI:N - hidp_session_run() automatically dequeues the peer's interrupt packet and calls hidp_recv_intr_frame(); once the attacker-owned HID peer connects, no victim needs to open an input node or perform another action.\nS:U - wacom_wac_pen_serial_enforce() reads past the HID report in the host kernel and passes the value to that host's input subsystem; no guest-host, IOMMU, or other security boundary is crossed.\nC:H - hid_field_extract() lacks a bounds check, allowing descriptor-selected offsets to read about 12 KB past a 2-byte report; wacom_wac_pen_serial_enforce() stores the value in serial[0], and wacom_wac_pen_report() can emit it as MSC_SERIAL.\nI:N - The flaw only reads beyond raw_data and assigns the result to the intended serial[0] and input-event state; it provides no out-of-bounds write or demonstrated control-flow or protected-data modification primitive.\nA:H - The demonstrated 98296-bit offset makes __extract() dereference far beyond raw_data and triggers KASAN; on a production kernel the same access can reach unmapped memory and cause an oops or panic." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/hid/wacom_sys.c" ], "versions": [ { "version": "83417206427bdf0fef9fa69957807194f25923c3", "lessThan": "9aa62f967b6a4bb30aa3b778e02c8a5ca6bcde51", "status": "affected", "versionType": "git" }, { "version": "83417206427bdf0fef9fa69957807194f25923c3", "lessThan": "26471d954bbfbfb9032994f7f485802ee20e0582", "status": "affected", "versionType": "git" }, { "version": "83417206427bdf0fef9fa69957807194f25923c3", "lessThan": "456afe4707e23cc114ad833197f63b52bb8fd1e7", "status": "affected", "versionType": "git" }, { "version": "83417206427bdf0fef9fa69957807194f25923c3", "lessThan": "65e7c4b5366b770c60dfefac3f1d06e33a9e411e", "status": "affected", "versionType": "git" }, { "version": "83417206427bdf0fef9fa69957807194f25923c3", "lessThan": "eaa7d29341ef4b91e84ad097562982288a7c376c", "status": "affected", "versionType": "git" }, { "version": "83417206427bdf0fef9fa69957807194f25923c3", "lessThan": "c3129e6f26e18c0886ede7265f187a7ec289e1d1", "status": "affected", "versionType": "git" }, { "version": "83417206427bdf0fef9fa69957807194f25923c3", "lessThan": "4b09b7c84b8633cd041181616bd15bf5e73c164d", "status": "affected", "versionType": "git" }, { "version": "83417206427bdf0fef9fa69957807194f25923c3", "lessThan": "9aa237cf66495b2426ddde8532e9b08a0ed83aaa", "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/wacom_sys.c" ], "versions": [ { "version": "4.16", "status": "affected" }, { "version": "0", "lessThan": "4.16", "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": "4.16", "versionEndExcluding": "5.10.271" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.16", "versionEndExcluding": "5.15.222" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.16", "versionEndExcluding": "6.1.189" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.16", "versionEndExcluding": "6.6.158" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.16", "versionEndExcluding": "6.12.112" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.16", "versionEndExcluding": "6.18.55" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.16", "versionEndExcluding": "7.2.9" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.16", "versionEndExcluding": "7.3" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/9aa62f967b6a4bb30aa3b778e02c8a5ca6bcde51" }, { "url": "https://git.kernel.org/stable/c/26471d954bbfbfb9032994f7f485802ee20e0582" }, { "url": "https://git.kernel.org/stable/c/456afe4707e23cc114ad833197f63b52bb8fd1e7" }, { "url": "https://git.kernel.org/stable/c/65e7c4b5366b770c60dfefac3f1d06e33a9e411e" }, { "url": "https://git.kernel.org/stable/c/eaa7d29341ef4b91e84ad097562982288a7c376c" }, { "url": "https://git.kernel.org/stable/c/c3129e6f26e18c0886ede7265f187a7ec289e1d1" }, { "url": "https://git.kernel.org/stable/c/4b09b7c84b8633cd041181616bd15bf5e73c164d" }, { "url": "https://git.kernel.org/stable/c/9aa237cf66495b2426ddde8532e9b08a0ed83aaa" } ], "title": "HID: wacom: fix OOB read in wacom_wac_pen_serial_enforce()", "x_generator": { "engine": "bippy-1.2.0" } } } }