298 lines
15 KiB
JSON
298 lines
15 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2026-80574",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2026-08-26T14:34:25.768Z",
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"datePublished": "2026-08-26T14:37:34.353Z",
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"dateUpdated": "2026-10-16T19:26:27.544Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-08-27T05:01:56.362Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nInput: focaltech - fix array out-of-bounds in focaltech_process_rel_packet\n\nMake finger2 (and also finger1) unsigned, so that if the finger index in\nthe packet is 0 then subtracting 1 creates an array index which overflows\nabove the existing check for FOC_MAX_FINGERS, as the existing comment says\nit should, instead of writing to state->fingers[-1]."
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}
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],
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"metrics": [
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{
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"cvssV3_1": {
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"version": "3.1",
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
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"baseScore": 8.4,
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"baseSeverity": "HIGH"
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},
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"scenarios": [
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{
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"lang": "en",
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"value": "AV:L - FocalTech FOC_REL packets reach focaltech_process_rel_packet through i8042/serio hardware interrupts, ps2_interrupt, psmouse_receive_byte, and focaltech_process_byte with no syscall gate; any local user on a laptop with an integrated FocalTech PS/2 touchpad can deliver the triggering bytes by normal touchpad use.\nAC:L - When the second relative finger index is 0, a documented valid case for odd finger counts, signed underflow makes finger2 -1 pass the FOC_MAX_FINGERS bound test and causes a reliable out-of-bounds write on every such packet without races or attacker-uncontrollable memory layout.\nPR:N - No Linux account, capability, or namespace privilege is required; the integrated touchpad feeds bytes directly into the kernel interrupt handler during normal operation, including at the login screen before authentication.\nUI:N - An attacker with brief local access can trigger the corrupting multitouch gestures directly on the touchpad; exploitation does not depend on a separate victim performing an unusual action beyond touching the device.\nS:U - The vulnerability corrupts kmalloc-allocated focaltech_data within the host kernel psmouse driver; impact is standard in-kernel memory corruption rather than crossing a guest/host, VM, or IOMMU security boundary.\nC:H - Out-of-bounds += writes to fingers[-1].x and fingers[-1].y corrupt adjacent focaltech_data fields such as y_max in kernel heap memory; this class of heap corruption can be leveraged for kernel information disclosure.\nI:H - Attacker-influenced PS/2 packet bytes supply signed 8-bit deltas that repeatedly perform out-of-bounds writes immediately before fingers[0], enabling progressive corruption of neighboring driver state and potential privilege escalation.\nA:H - Corrupting kmalloc-allocated driver state via fingers[-1] can destabilize the input subsystem or adjacent heap objects, causing kernel oops, panic, or repeatable denial of service on affected laptops."
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}
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]
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/input/mouse/focaltech.c"
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],
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"versions": [
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{
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"version": "05be1d079ec0b3691783e4384b1ada82149ff7d2",
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"lessThan": "063b4c6a6f3fc01bca085c442000c9c100fdbd93",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "05be1d079ec0b3691783e4384b1ada82149ff7d2",
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"lessThan": "bb502d79acb9ac1e0a77fa8bc7b7b4729140b11f",
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"status": "affected",
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"versionType": "git"
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},
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{
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"lessThan": "ca92c98b806839c108995b2bbff7061515bdfb53",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "05be1d079ec0b3691783e4384b1ada82149ff7d2",
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"lessThan": "81b07470cb2937ceb74b00be88151582a322433b",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "05be1d079ec0b3691783e4384b1ada82149ff7d2",
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"lessThan": "6f6d5fe29efdf5001bc146fc292e6592cace93eb",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "05be1d079ec0b3691783e4384b1ada82149ff7d2",
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"lessThan": "83c265bfc084d77e2171d4b67362150ab38c935b",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "05be1d079ec0b3691783e4384b1ada82149ff7d2",
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"lessThan": "1842e47126816e56d30c4f856f9854fd7831066c",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "05be1d079ec0b3691783e4384b1ada82149ff7d2",
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"lessThan": "296736076b3fd078742651c719555a488624023a",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/input/mouse/focaltech.c"
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],
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"versions": [
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{
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"version": "4.0",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "4.0",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.10.266",
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"lessThanOrEqual": "5.10.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.15.217",
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"lessThanOrEqual": "5.15.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.1.184",
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"lessThanOrEqual": "6.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.6.153",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.12.105",
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"lessThanOrEqual": "6.12.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.18.46",
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"lessThanOrEqual": "6.18.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.1.10",
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"lessThanOrEqual": "7.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "7.2",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.0",
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"versionEndExcluding": "5.10.266"
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/063b4c6a6f3fc01bca085c442000c9c100fdbd93"
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},
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{
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"url": "https://git.kernel.org/stable/c/bb502d79acb9ac1e0a77fa8bc7b7b4729140b11f"
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},
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{
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"url": "https://git.kernel.org/stable/c/ca92c98b806839c108995b2bbff7061515bdfb53"
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},
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{
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"url": "https://git.kernel.org/stable/c/81b07470cb2937ceb74b00be88151582a322433b"
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},
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{
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"url": "https://git.kernel.org/stable/c/6f6d5fe29efdf5001bc146fc292e6592cace93eb"
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},
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{
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"url": "https://git.kernel.org/stable/c/83c265bfc084d77e2171d4b67362150ab38c935b"
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},
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{
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"url": "https://git.kernel.org/stable/c/1842e47126816e56d30c4f856f9854fd7831066c"
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},
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{
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"url": "https://git.kernel.org/stable/c/296736076b3fd078742651c719555a488624023a"
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}
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],
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"title": "Input: focaltech - fix array out-of-bounds in focaltech_process_rel_packet",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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},
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"adp": [
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{
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"metrics": [
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{
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"other": {
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"type": "ssvc",
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"content": {
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"id": "CVE-2026-80574",
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"role": "CISA Coordinator",
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"options": [
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{
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"Exploitation": "none"
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},
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{
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"Automatable": "no"
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},
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{
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"Technical Impact": "total"
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}
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],
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"version": "2.0.3",
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"timestamp": "2026-10-16T19:17:38.877243Z"
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}
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}
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}
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],
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"title": "CISA ADP Vulnrichment",
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"providerMetadata": {
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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"shortName": "CISA-ADP",
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"dateUpdated": "2026-10-16T19:26:27.544Z"
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}
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}
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]
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}
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} |