{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-63916", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-19T07:54:57.020Z", "datePublished": "2026-07-19T14:55:20.015Z", "dateUpdated": "2026-10-19T20:17:55.788Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:37:10.495Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nHID: wacom: Fix OOB write in wacom_hid_set_device_mode()\n\nwacom_hid_set_device_mode() currently assumes that the HID_DG_INPUTMODE\nusage is always located in the first field (field[0]) of the feature report.\nHowever, a device can specify HID_DG_INPUTMODE in a different field.\n\nIf HID_DG_INPUTMODE is in a field other than the first one and the first\nfield has a report_count smaller than the usage_index of HID_DG_INPUTMODE,\nthis leads to an out-of-bounds write to r->field[0]->value.\n\nFix this by storing the field index of HID_DG_INPUTMODE in 'struct\nhid_data' during feature mapping. In wacom_hid_set_device_mode(), use\nthis stored field index to access the correct field and add bounds\nchecks to ensure both the field index and the value index are within\nvalid ranges before writing."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:A - The bug is triggered when the kernel probes a Wacom HID device whose report descriptor is supplied by the peripheral; Bluetooth Wacom tablets are widely deployed and an attacker within radio range can present a malicious spoofed Wacom Bluetooth HID device, which is a more severe but reasonable reach path than USB-only scenarios.\nAC:L - The attacker fully controls the malicious device's HID report descriptor and can reliably place HID_DG_INPUTMODE in a non-first field with a high usage_index while keeping field[0]'s report_count small, causing deterministic OOB write during driver initialization without race conditions or rare configuration.\nPR:N - Exploitation requires no privileges on the victim system; an attacker only needs to connect or spoof a malicious Wacom HID peripheral (USB plug-in or Bluetooth advertisement), with no login, capabilities, or user-namespace access required on the target host.\nUI:N - No victim interaction with applications or files is needed; the attacker can physically connect a USB device to an unattended machine or deliver a spoofed Bluetooth peripheral, and the kernel automatically parses the descriptor and calls the vulnerable function during device probe or resume.\nS:U - The out-of-bounds write corrupts kernel heap memory within the same kernel security boundary, enabling local privilege escalation or denial of service but not crossing a VM, IOMMU, or sandbox boundary.\nC:H - The out-of-bounds write to field[0]->value can corrupt adjacent heap objects (new_value, usages_priorities, or neighboring kmalloc allocations), and such kernel heap memory corruption is reasonably exploitable for information disclosure.\nI:H - This is an out-of-bounds write in kernel heap memory with attacker-influenced offset and value (writes integer 2), which per CVSS kernel guidance constitutes high integrity impact due to potential arbitrary memory corruption and code execution.\nA:H - Corrupting kernel heap metadata or adjacent objects during device initialization can cause kernel oops, panic, or hang, and any out-of-bounds write in kernel space carries high availability impact even before full exploitation."}]}], "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", "drivers/hid/wacom_wac.h"], "versions": [{"version": "5ae6e89f7409cb5d218bb728326eba9c650d9700", "lessThan": "2add311d99646c9d235b2c44f9c169ba30f5db3a", "status": "affected", "versionType": "git"}, {"version": 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The out-of-bounds write to field[0]->value can corrupt adjacent heap objects (new_value, usages_priorities, or neighboring kmalloc allocations), and such kernel heap memory corruption is reasonably exploitable for information disclosure.\nI:H - This is an out-of-bounds write in kernel heap memory with attacker-influenced offset and value (writes integer 2), which per CVSS kernel guidance constitutes high integrity impact due to potential arbitrary memory corruption and code execution.\nA:H - Corrupting kernel heap metadata or adjacent objects during device initialization can cause kernel oops, panic, or hang, and any out-of-bounds write in kernel space carries high availability impact even before full exploitation."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "5ae6e89f7409cb5d218bb728326eba9c650d9700", "lessThan": "2add311d99646c9d235b2c44f9c169ba30f5db3a", "versionType": "git"}, {"status": "affected", "version": "5ae6e89f7409cb5d218bb728326eba9c650d9700", "lessThan": "83bd8a5756a3c4a413ed8f6253f9eb2821e1ccaf", "versionType": "git"}, {"status": "affected", "version": "5ae6e89f7409cb5d218bb728326eba9c650d9700", "lessThan": "5716a293fb19d382ca2336e08fd28a619a5f3c25", "versionType": "git"}, {"status": "affected", "version": "5ae6e89f7409cb5d218bb728326eba9c650d9700", "lessThan": "ed598de9f61582902406d352d99f2073d8e00298", "versionType": "git"}, {"status": "affected", "version": "5ae6e89f7409cb5d218bb728326eba9c650d9700", "lessThan": "43e7c02d6090a82fd60d63491f6871aec906345e", "versionType": "git"}, {"status": "affected", "version": "5ae6e89f7409cb5d218bb728326eba9c650d9700", "lessThan": "b8338111e14183972359009c12d0dbd81d2e1e16", "versionType": "git"}, {"status": "affected", "version": "5ae6e89f7409cb5d218bb728326eba9c650d9700", "lessThan": "5db3fca0cec7b33bc5379411d0a60d792c9f9bc0", "versionType": "git"}, {"status": "affected", "version": "5ae6e89f7409cb5d218bb728326eba9c650d9700", "lessThan": "c0a8899e02ddebd51e2589835182c239c2e224ae", "versionType": "git"}], "programFiles": ["drivers/hid/wacom_sys.c", "drivers/hid/wacom_wac.h"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "3.18"}, {"status": "unaffected", "version": "0", "lessThan": "3.18", "versionType": "semver"}, {"status": "unaffected", "version": "5.10.259", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.210", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.176", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.143", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.93", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.35", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.0.12", "versionType": "semver", "lessThanOrEqual": "7.0.*"}, {"status": "unaffected", "version": "7.1", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["drivers/hid/wacom_sys.c", "drivers/hid/wacom_wac.h"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/2add311d99646c9d235b2c44f9c169ba30f5db3a"}, {"url": "https://git.kernel.org/stable/c/83bd8a5756a3c4a413ed8f6253f9eb2821e1ccaf"}, {"url": "https://git.kernel.org/stable/c/5716a293fb19d382ca2336e08fd28a619a5f3c25"}, {"url": "https://git.kernel.org/stable/c/ed598de9f61582902406d352d99f2073d8e00298"}, {"url": "https://git.kernel.org/stable/c/43e7c02d6090a82fd60d63491f6871aec906345e"}, {"url": "https://git.kernel.org/stable/c/b8338111e14183972359009c12d0dbd81d2e1e16"}, {"url": "https://git.kernel.org/stable/c/5db3fca0cec7b33bc5379411d0a60d792c9f9bc0"}, {"url": "https://git.kernel.org/stable/c/c0a8899e02ddebd51e2589835182c239c2e224ae"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nHID: wacom: Fix OOB write in wacom_hid_set_device_mode()\n\nwacom_hid_set_device_mode() currently assumes that the HID_DG_INPUTMODE\nusage is always located in the first field (field[0]) of the feature report.\nHowever, a device can specify HID_DG_INPUTMODE in a different field.\n\nIf HID_DG_INPUTMODE is in a field other than the first one and the first\nfield has a report_count smaller than the usage_index of HID_DG_INPUTMODE,\nthis leads to an out-of-bounds write to r->field[0]->value.\n\nFix this by storing the field index of HID_DG_INPUTMODE in 'struct\nhid_data' during feature mapping. 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"81DFF19E-9CF8-49C6-8C36-1E4038622933", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nHID: wacom: Fix OOB write in wacom_hid_set_device_mode()\n\nwacom_hid_set_device_mode() currently assumes that the HID_DG_INPUTMODE\nusage is always located in the first field (field[0]) of the feature report.\nHowever, a device can specify HID_DG_INPUTMODE in a different field.\n\nIf HID_DG_INPUTMODE is in a field other than the first one and the first\nfield has a report_count smaller than the usage_index of HID_DG_INPUTMODE,\nthis leads to an out-of-bounds write to r->field[0]->value.\n\nFix this by storing the field index of HID_DG_INPUTMODE in 'struct\nhid_data' during feature mapping. In wacom_hid_set_device_mode(), use\nthis stored field index to access the correct field and add bounds\nchecks to ensure both the field index and the value index are within\nvalid ranges before writing."}], "id": "CVE-2026-63916", "lastModified": "2026-10-30T17:44:37.287", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-63916", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-10-16T15:33:16.082526Z", "version": "2.0.3"}}]}, "published": "2026-07-19T16:17:09.657", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/2add311d99646c9d235b2c44f9c169ba30f5db3a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/43e7c02d6090a82fd60d63491f6871aec906345e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/5716a293fb19d382ca2336e08fd28a619a5f3c25"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/5db3fca0cec7b33bc5379411d0a60d792c9f9bc0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/83bd8a5756a3c4a413ed8f6253f9eb2821e1ccaf"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b8338111e14183972359009c12d0dbd81d2e1e16"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c0a8899e02ddebd51e2589835182c239c2e224ae"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ed598de9f61582902406d352d99f2073d8e00298"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-787"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-787"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: HID: wacom: Fix OOB write in wacom_hid_set_device_mode()", "id": "2502316", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2502316"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-787", "details": ["A flaw was found in the Linux kernel's Human Interface Device (HID) wacom driver. The wacom_hid_set_device_mode() function incorrectly handles the location of input mode data within a device's report. This can lead to an out-of-bounds write, where the system attempts to write data beyond the allocated memory buffer. Such memory corruption could potentially allow a local attacker to cause system instability or escalate privileges."], "name": "CVE-2026-63916", "public_date": "2026-07-19T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-63916\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-63916\nhttps://lore.kernel.org/linux-cve-announce/2026071947-CVE-2026-63916-5ec3@gregkh/T"], "threat_severity": "Moderate"}

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