{ "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": "2026-08-05T12:37:10.495Z" }, "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": "5ae6e89f7409cb5d218bb728326eba9c650d9700", "lessThan": "83bd8a5756a3c4a413ed8f6253f9eb2821e1ccaf", "status": "affected", "versionType": "git" }, { "version": "5ae6e89f7409cb5d218bb728326eba9c650d9700", "lessThan": "5716a293fb19d382ca2336e08fd28a619a5f3c25", "status": "affected", "versionType": "git" }, { "version": "5ae6e89f7409cb5d218bb728326eba9c650d9700", "lessThan": "ed598de9f61582902406d352d99f2073d8e00298", "status": "affected", "versionType": "git" }, { "version": "5ae6e89f7409cb5d218bb728326eba9c650d9700", "lessThan": "43e7c02d6090a82fd60d63491f6871aec906345e", "status": "affected", "versionType": "git" }, { "version": "5ae6e89f7409cb5d218bb728326eba9c650d9700", "lessThan": "b8338111e14183972359009c12d0dbd81d2e1e16", "status": "affected", "versionType": "git" }, { "version": "5ae6e89f7409cb5d218bb728326eba9c650d9700", "lessThan": "5db3fca0cec7b33bc5379411d0a60d792c9f9bc0", "status": "affected", "versionType": "git" }, { "version": "5ae6e89f7409cb5d218bb728326eba9c650d9700", "lessThan": "c0a8899e02ddebd51e2589835182c239c2e224ae", "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", "drivers/hid/wacom_wac.h" ], "versions": [ { "version": "3.18", "status": "affected" }, { "version": "0", "lessThan": "3.18", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.259", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.210", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.176", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.143", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.93", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.35", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.0.12", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.1", "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": "3.18", "versionEndExcluding": "5.10.259" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.18", "versionEndExcluding": "5.15.210" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.18", "versionEndExcluding": "6.1.176" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.18", "versionEndExcluding": "6.6.143" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.18", "versionEndExcluding": "6.12.93" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.18", "versionEndExcluding": "6.18.35" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.18", "versionEndExcluding": "7.0.12" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.18", "versionEndExcluding": "7.1" } ] } ] } ], "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" } ], "title": "HID: wacom: Fix OOB write in wacom_hid_set_device_mode()", "x_generator": { "engine": "bippy-1.2.0" } } } }