{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-89628", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.738Z", "datePublished": "2026-09-11T19:45:24.203Z", "dateUpdated": "2026-09-11T19:45:24.203Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-09-11T19:45:24.203Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nHID: picolcd: clamp eeprom debugfs read to bytes actually received\n\npicolcd_debug_eeprom_read() trusts resp->raw_data[2] -- a length byte\nsupplied by the device in its REPORT_EE_DATA reply -- clamped only to\nthe caller's read() count:\n\n\tret = resp->raw_data[2];\n\tif (ret > s)\n\t\tret = s;\n\tif (copy_to_user(u, resp->raw_data+3, ret))\n\nIt never checks resp->raw_size, the number of bytes picolcd_raw_event()\nactually copied into the 64-byte raw_data[] of the kmalloc'd struct\npicolcd_pending. A device (or a spoofed picoLCD) returning a length byte\nof 0xff, read with a count >= 255, makes copy_to_user() read past\nraw_data[] into adjacent slab memory and return it to userspace through\nthe debugfs \"eeprom\" file:\n\n\tBUG: KASAN: slab-out-of-bounds in _copy_to_user\n\tRead of size 255 ... picolcd_debug_eeprom_read+0x214/0x2f0 [hid_picolcd]\n\nThe debug-dump path in the same file already validates the device length\nbyte against the received size before trusting it; this read does not.\nThe file is created S_IRUSR (root-only) and a crafted device is needed,\nso it is neither unprivileged- nor remotely-triggerable.\n\nClamp the copy length to resp->raw_size - 3 (the payload actually\nreceived, minus the 3-byte header), floored at 0 for short replies."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/hid/hid-picolcd_debugfs.c"], "versions": [{"version": "9bbf2b98ba11d00bd73e3254e15cfe17ccaff6ba", "lessThan": "a3e6e8d7198a9f3861861520a38b673684a1062b", "status": "affected", "versionType": "git"}, {"version": "9bbf2b98ba11d00bd73e3254e15cfe17ccaff6ba", "lessThan": "471f4a939c66d1d44aece2321807abf609fc9098", "status": "affected", "versionType": "git"}, {"version": "9bbf2b98ba11d00bd73e3254e15cfe17ccaff6ba", "lessThan": "699a3c8b56e168ca19d12722f3f5ef1d6f4b1d84", "status": "affected", "versionType": "git"}, {"version": "9bbf2b98ba11d00bd73e3254e15cfe17ccaff6ba", "lessThan": "e9c667395ac1f8024f623250b32bae4c7af9caa0", "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/hid-picolcd_debugfs.c"], "versions": [{"version": "2.6.35", "status": "affected"}, {"version": "0", "lessThan": "2.6.35", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.109", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.50", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.4", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3-rc1", "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": "2.6.35", "versionEndExcluding": "6.12.109"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.35", "versionEndExcluding": "6.18.50"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.35", "versionEndExcluding": "7.2.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.35", "versionEndExcluding": "7.3-rc1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/a3e6e8d7198a9f3861861520a38b673684a1062b"}, {"url": "https://git.kernel.org/stable/c/471f4a939c66d1d44aece2321807abf609fc9098"}, {"url": "https://git.kernel.org/stable/c/699a3c8b56e168ca19d12722f3f5ef1d6f4b1d84"}, {"url": "https://git.kernel.org/stable/c/e9c667395ac1f8024f623250b32bae4c7af9caa0"}], "title": "HID: picolcd: clamp eeprom debugfs read to bytes actually received", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/hid/hid-picolcd_debugfs.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "a3e6e8d7198a9f3861861520a38b673684a1062b", "status": "affected", "version": "9bbf2b98ba11d00bd73e3254e15cfe17ccaff6ba", "versionType": "git"}, {"lessThan": "471f4a939c66d1d44aece2321807abf609fc9098", "status": "affected", "version": "9bbf2b98ba11d00bd73e3254e15cfe17ccaff6ba", "versionType": "git"}, {"lessThan": "699a3c8b56e168ca19d12722f3f5ef1d6f4b1d84", "status": "affected", "version": "9bbf2b98ba11d00bd73e3254e15cfe17ccaff6ba", "versionType": "git"}, {"lessThan": "e9c667395ac1f8024f623250b32bae4c7af9caa0", "status": "affected", "version": "9bbf2b98ba11d00bd73e3254e15cfe17ccaff6ba", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/hid/hid-picolcd_debugfs.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "2.6.35"}, {"lessThan": "2.6.35", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.109", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.50", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.4", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3-rc1", "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\nHID: picolcd: clamp eeprom debugfs read to bytes actually received\n\npicolcd_debug_eeprom_read() trusts resp->raw_data[2] -- a length byte\nsupplied by the device in its REPORT_EE_DATA reply -- clamped only to\nthe caller's read() count:\n\n\tret = resp->raw_data[2];\n\tif (ret > s)\n\t\tret = s;\n\tif (copy_to_user(u, resp->raw_data+3, ret))\n\nIt never checks resp->raw_size, the number of bytes picolcd_raw_event()\nactually copied into the 64-byte raw_data[] of the kmalloc'd struct\npicolcd_pending. A device (or a spoofed picoLCD) returning a length byte\nof 0xff, read with a count >= 255, makes copy_to_user() read past\nraw_data[] into adjacent slab memory and return it to userspace through\nthe debugfs \"eeprom\" file:\n\n\tBUG: KASAN: slab-out-of-bounds in _copy_to_user\n\tRead of size 255 ... picolcd_debug_eeprom_read+0x214/0x2f0 [hid_picolcd]\n\nThe debug-dump path in the same file already validates the device length\nbyte against the received size before trusting it; this read does not.\nThe file is created S_IRUSR (root-only) and a crafted device is needed,\nso it is neither unprivileged- nor remotely-triggerable.\n\nClamp the copy length to resp->raw_size - 3 (the payload actually\nreceived, minus the 3-byte header), floored at 0 for short replies."}], "id": "CVE-2026-89628", "lastModified": "2026-09-11T20:19:48.270", "metrics": {}, "published": "2026-09-11T20:19:48.270", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/471f4a939c66d1d44aece2321807abf609fc9098"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/699a3c8b56e168ca19d12722f3f5ef1d6f4b1d84"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a3e6e8d7198a9f3861861520a38b673684a1062b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e9c667395ac1f8024f623250b32bae4c7af9caa0"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Linux kernel: HID picolcd driver information disclosure via out-of-bounds read", "id": "2532179", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2532179"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.4", "cvss3_scoring_vector": "CVSS:3.1/AV:P/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:H", "status": "draft"}, "cwe": "CWE-805", "details": ["A flaw was found in the Human Interface Device (HID) picolcd driver in the Linux kernel. A local attacker with root privileges, by using a specially crafted or spoofed picoLCD device, could exploit an out-of-bounds read vulnerability in the picolcd_debug_eeprom_read() function. This flaw occurs because the function trusts a device-supplied length without proper validation against the actual received data size. Successful exploitation could lead to the disclosure of sensitive information from adjacent kernel memory to userspace."], "name": "CVE-2026-89628", "public_date": "2026-09-11T19:45:24Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-89628\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-89628\nhttps://git.kernel.org/stable/c/471f4a939c66d1d44aece2321807abf609fc9098\nhttps://git.kernel.org/stable/c/699a3c8b56e168ca19d12722f3f5ef1d6f4b1d84\nhttps://git.kernel.org/stable/c/a3e6e8d7198a9f3861861520a38b673684a1062b\nhttps://git.kernel.org/stable/c/e9c667395ac1f8024f623250b32bae4c7af9caa0"], "threat_severity": "Moderate"}

{"created": "2026-09-12T07:45:10.711304+00:00", "updated": "2026-09-12T11:00:12.561161+00:00", "vendors": []}