{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-43047", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-01T14:12:55.979Z", "datePublished": "2026-05-01T14:15:42.562Z", "dateUpdated": "2026-08-05T12:25:32.795Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:25:32.795Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nHID: multitouch: Check to ensure report responses match the request\n\nIt is possible for a malicious (or clumsy) device to respond to a\nspecific report's feature request using a completely different report\nID. This can cause confusion in the HID core resulting in nasty\nside-effects such as OOB writes.\n\nAdd a check to ensure that the report ID in the response, matches the\none that was requested. If it doesn't, omit reporting the raw event and\nreturn early." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The vulnerable path is reachable by a local process through /dev/uhid by creating a synthetic HID multitouch device and replying to the kernel's UHID_GET_REPORT with a mismatched report ID. Malicious physical HID devices can also trigger it, but UHID provides a higher-severity local device-file path.\nAC:L - The attacker controls the HID report descriptor and the feature-report response contents, and the bug is triggered deterministically during probe/open/resume feature fetching. There is no race or condition outside the attacker's control.\nPR:L - The local UHID path requires only access to the UHID character device as a low-privileged local user or permitted device group member. The kernel UHID create/reply path has no capable() gate requiring real root.\nUI:N - A local UHID attacker can create the virtual device and answer the kernel's GET_REPORT request directly. No separate victim action is required.\nS:U - The corruption occurs within the kernel HID/HID-core processing context and affects the same kernel security authority. It is not a VM escape, IOMMU bypass, or cross-authority boundary change.\nC:H - The fix commit states that the mismatched report response can lead to HID-core confusion with out-of-bounds writes. Kernel memory corruption is reasonably capable of producing arbitrary information disclosure primitives.\nI:H - An out-of-bounds write in kernel memory is high-integrity impact because it can corrupt kernel objects and plausibly be developed into control-flow hijack or privilege escalation. When uncertain, the higher severity is appropriate.\nA:H - The same kernel memory corruption can crash or panic the kernel during HID report processing. Even without full exploitation, repeated triggering can cause high availability impact." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/hid/hid-multitouch.c" ], "versions": [ { "version": "6d4f5440a3a2bb2e9d0d582bbf98234e9e9bb095", "lessThan": "516da3f25cfe18643835af1cf09b0e9ffc36c383", "status": "affected", "versionType": "git" }, { "version": "6d4f5440a3a2bb2e9d0d582bbf98234e9e9bb095", "lessThan": "a61163daf8a90b4a7ef154d5fc9c525f665734e3", "status": "affected", "versionType": "git" }, { "version": "6d4f5440a3a2bb2e9d0d582bbf98234e9e9bb095", "lessThan": "74c6015375d8b9bc1b1eb79f20636c8e894bcad7", "status": "affected", "versionType": "git" }, { "version": "6d4f5440a3a2bb2e9d0d582bbf98234e9e9bb095", "lessThan": "c7a27bb4d0f6573ca0f9c7ef0b63291486239190", "status": "affected", "versionType": "git" }, { "version": "6d4f5440a3a2bb2e9d0d582bbf98234e9e9bb095", "lessThan": "6a4acd3e86fe5584050c213d95147eba33856033", "status": "affected", "versionType": "git" }, { "version": "6d4f5440a3a2bb2e9d0d582bbf98234e9e9bb095", "lessThan": "7f66fdbc077faed3b52519228d21d81979e92249", "status": "affected", "versionType": "git" }, { "version": "6d4f5440a3a2bb2e9d0d582bbf98234e9e9bb095", "lessThan": "2edc92f89eee328b5be5706b5d431bf90669e9c0", "status": "affected", "versionType": "git" }, { "version": "6d4f5440a3a2bb2e9d0d582bbf98234e9e9bb095", "lessThan": "e716edafedad4952fe3a4a273d2e039a84e8681a", "status": "affected", "versionType": "git" }, { "version": "fee906f035f0bd18ff12d84d58766c44a2ab0918", "status": "affected", "versionType": "git" }, { "version": "4.3.6", "lessThan": "4.4", "status": "affected", "versionType": "semver" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/hid/hid-multitouch.c" ], "versions": [ { "version": "4.4", "status": "affected" }, { "version": "0", "lessThan": "4.4", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.253", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.203", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.168", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.134", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.81", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.22", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.19.12", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.0", "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": "4.4", "versionEndExcluding": "5.10.253" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.4", "versionEndExcluding": "5.15.203" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.4", "versionEndExcluding": "6.1.168" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.4", "versionEndExcluding": "6.6.134" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.4", "versionEndExcluding": "6.12.81" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.4", "versionEndExcluding": "6.18.22" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.4", "versionEndExcluding": "6.19.12" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.4", "versionEndExcluding": "7.0" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.3.6" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/516da3f25cfe18643835af1cf09b0e9ffc36c383" }, { "url": "https://git.kernel.org/stable/c/a61163daf8a90b4a7ef154d5fc9c525f665734e3" }, { "url": "https://git.kernel.org/stable/c/74c6015375d8b9bc1b1eb79f20636c8e894bcad7" }, { "url": "https://git.kernel.org/stable/c/c7a27bb4d0f6573ca0f9c7ef0b63291486239190" }, { "url": "https://git.kernel.org/stable/c/6a4acd3e86fe5584050c213d95147eba33856033" }, { "url": "https://git.kernel.org/stable/c/7f66fdbc077faed3b52519228d21d81979e92249" }, { "url": "https://git.kernel.org/stable/c/2edc92f89eee328b5be5706b5d431bf90669e9c0" }, { "url": "https://git.kernel.org/stable/c/e716edafedad4952fe3a4a273d2e039a84e8681a" } ], "title": "HID: multitouch: Check to ensure report responses match the request", "x_generator": { "engine": "bippy-1.2.0" } } } }