{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-80566", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-26T14:34:25.767Z", "datePublished": "2026-08-26T14:37:29.552Z", "dateUpdated": "2026-08-26T14:37:29.552Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-26T14:37:29.552Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nInput: hynitron_cstxxx - validate touch count and finger IDs\n\nThe driver allocates max_touch_num input slots, which are indexed from\nzero through max_touch_num - 1. The current check allows a finger ID\nequal to max_touch_num to reach cst3xx_report_contact(). While the input\ncore ignores out-of-range slot indices, reporting touch data without a\nvalid slot change corrupts the touch state of the previously active slot.\n\nThe touch count is read from the controller's report and is used to\nindex the fixed-size report buffer without first checking its range.\nReject counts larger than the supported number of touch slots before\nchecking the trailing byte or parsing touch data.\n\nReject finger IDs equal to or greater than max_touch_num, and return\nimmediately when an invalid finger ID is encountered so that corrupt\ntouch frames are discarded instead of reporting partial contact state.\n\nThe V821 Avaota F1 board configures the vendor driver with one touch\nslot, so finger ID 1 is already invalid on that device."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/input/touchscreen/hynitron_cstxxx.c"], "versions": [{"version": "66603243f5283f7f28c795f09e7c2167233df0bd", "lessThan": "ec61ca4e310665816a639cb2e46cd9b3af0a9bee", "status": "affected", "versionType": "git"}, {"version": "66603243f5283f7f28c795f09e7c2167233df0bd", "lessThan": "387829ee60de26c7c073ed4e27ecfab2b75d4c74", "status": "affected", "versionType": "git"}, {"version": "66603243f5283f7f28c795f09e7c2167233df0bd", "lessThan": "38e7d5c1ade04b99c70da0298ca296ee62bc99c0", "status": "affected", "versionType": "git"}, {"version": "66603243f5283f7f28c795f09e7c2167233df0bd", "lessThan": "51c5503554c87e4de4035468bebf186205391ce9", "status": "affected", "versionType": "git"}, {"version": "66603243f5283f7f28c795f09e7c2167233df0bd", "lessThan": "27f380ef0e1d3de3cde114e02d33f9320ce3a5a6", "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/input/touchscreen/hynitron_cstxxx.c"], "versions": [{"version": "6.2", "status": "affected"}, {"version": "0", "lessThan": "6.2", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.153", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.105", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.46", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.10", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "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": "6.2", "versionEndExcluding": "6.6.153"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.2", "versionEndExcluding": "6.12.105"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.2", "versionEndExcluding": "6.18.46"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.2", "versionEndExcluding": "7.1.10"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.2", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/ec61ca4e310665816a639cb2e46cd9b3af0a9bee"}, {"url": "https://git.kernel.org/stable/c/387829ee60de26c7c073ed4e27ecfab2b75d4c74"}, {"url": "https://git.kernel.org/stable/c/38e7d5c1ade04b99c70da0298ca296ee62bc99c0"}, {"url": "https://git.kernel.org/stable/c/51c5503554c87e4de4035468bebf186205391ce9"}, {"url": "https://git.kernel.org/stable/c/27f380ef0e1d3de3cde114e02d33f9320ce3a5a6"}], "title": "Input: hynitron_cstxxx - validate touch count and finger IDs", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/input/touchscreen/hynitron_cstxxx.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "ec61ca4e310665816a639cb2e46cd9b3af0a9bee", "status": "affected", "version": "66603243f5283f7f28c795f09e7c2167233df0bd", "versionType": "git"}, {"lessThan": "387829ee60de26c7c073ed4e27ecfab2b75d4c74", "status": "affected", "version": "66603243f5283f7f28c795f09e7c2167233df0bd", "versionType": "git"}, {"lessThan": "38e7d5c1ade04b99c70da0298ca296ee62bc99c0", "status": "affected", "version": "66603243f5283f7f28c795f09e7c2167233df0bd", "versionType": "git"}, {"lessThan": "51c5503554c87e4de4035468bebf186205391ce9", "status": "affected", "version": "66603243f5283f7f28c795f09e7c2167233df0bd", "versionType": "git"}, {"lessThan": "27f380ef0e1d3de3cde114e02d33f9320ce3a5a6", "status": "affected", "version": "66603243f5283f7f28c795f09e7c2167233df0bd", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/input/touchscreen/hynitron_cstxxx.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.2"}, {"lessThan": "6.2", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.153", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.105", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.46", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.10", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nInput: hynitron_cstxxx - validate touch count and finger IDs\n\nThe driver allocates max_touch_num input slots, which are indexed from\nzero through max_touch_num - 1. The current check allows a finger ID\nequal to max_touch_num to reach cst3xx_report_contact(). While the input\ncore ignores out-of-range slot indices, reporting touch data without a\nvalid slot change corrupts the touch state of the previously active slot.\n\nThe touch count is read from the controller's report and is used to\nindex the fixed-size report buffer without first checking its range.\nReject counts larger than the supported number of touch slots before\nchecking the trailing byte or parsing touch data.\n\nReject finger IDs equal to or greater than max_touch_num, and return\nimmediately when an invalid finger ID is encountered so that corrupt\ntouch frames are discarded instead of reporting partial contact state.\n\nThe V821 Avaota F1 board configures the vendor driver with one touch\nslot, so finger ID 1 is already invalid on that device."}], "id": "CVE-2026-80566", "lastModified": "2026-08-26T15:17:11.727", "metrics": {}, "published": "2026-08-26T15:17:11.727", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/27f380ef0e1d3de3cde114e02d33f9320ce3a5a6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/387829ee60de26c7c073ed4e27ecfab2b75d4c74"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/38e7d5c1ade04b99c70da0298ca296ee62bc99c0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/51c5503554c87e4de4035468bebf186205391ce9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ec61ca4e310665816a639cb2e46cd9b3af0a9bee"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Input: hynitron_cstxxx - validate touch count and finger IDs", "id": "2524461", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2524461"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-787", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nInput: hynitron_cstxxx - validate touch count and finger IDs\nThe driver allocates max_touch_num input slots, which are indexed from\nzero through max_touch_num - 1. The current check allows a finger ID\nequal to max_touch_num to reach cst3xx_report_contact(). While the input\ncore ignores out-of-range slot indices, reporting touch data without a\nvalid slot change corrupts the touch state of the previously active slot.\nThe touch count is read from the controller's report and is used to\nindex the fixed-size report buffer without first checking its range.\nReject counts larger than the supported number of touch slots before\nchecking the trailing byte or parsing touch data.\nReject finger IDs equal to or greater than max_touch_num, and return\nimmediately when an invalid finger ID is encountered so that corrupt\ntouch frames are discarded instead of reporting partial contact state.\nThe V821 Avaota F1 board configures the vendor driver with one touch\nslot, so finger ID 1 is already invalid on that device.", "A flaw was found in the `hynitron_cstxxx` driver in the Linux kernel. This vulnerability allows an attacker to provide specially crafted touch input that can bypass validation checks for touch count and finger identifiers (IDs). This improper handling can lead to the corruption of the touch state or the discarding of valid touch frames, effectively causing a denial of service for the touch input functionality."], "name": "CVE-2026-80566", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-08-26T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-80566\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-80566\nhttps://lore.kernel.org/linux-cve-announce/2026082611-CVE-2026-80566-0da4@gregkh/T"], "threat_severity": "Moderate"}