{"api_version":"1","generated_at":"2026-09-14T17:54:45+00:00","cve":"CVE-2026-89628","urls":{"html":"https://cve.report/CVE-2026-89628","api":"https://cve.report/api/cve/CVE-2026-89628.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-89628","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-89628"},"summary":{"title":"HID: picolcd: clamp eeprom debugfs read to bytes actually received","description":"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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-11 20:19:48","updated_at":"2026-09-14 13:19:16"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/a3e6e8d7198a9f3861861520a38b673684a1062b","name":"https://git.kernel.org/stable/c/a3e6e8d7198a9f3861861520a38b673684a1062b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/4daf432c94a42e7be6aa10b012b33af5ed9bc118","name":"https://git.kernel.org/stable/c/4daf432c94a42e7be6aa10b012b33af5ed9bc118","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/1a02056c2bf7ef9b5fd05ee6913aeeadb703c443","name":"https://git.kernel.org/stable/c/1a02056c2bf7ef9b5fd05ee6913aeeadb703c443","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/699a3c8b56e168ca19d12722f3f5ef1d6f4b1d84","name":"https://git.kernel.org/stable/c/699a3c8b56e168ca19d12722f3f5ef1d6f4b1d84","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/65daa322f1021d8206f8032c4cd4c0cb2d26c7c3","name":"https://git.kernel.org/stable/c/65daa322f1021d8206f8032c4cd4c0cb2d26c7c3","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/e9c667395ac1f8024f623250b32bae4c7af9caa0","name":"https://git.kernel.org/stable/c/e9c667395ac1f8024f623250b32bae4c7af9caa0","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/8dc662af019158690c470edd2e2857657f700abb","name":"https://git.kernel.org/stable/c/8dc662af019158690c470edd2e2857657f700abb","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/471f4a939c66d1d44aece2321807abf609fc9098","name":"https://git.kernel.org/stable/c/471f4a939c66d1d44aece2321807abf609fc9098","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-89628","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89628","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 9bbf2b98ba11d00bd73e3254e15cfe17ccaff6ba 1a02056c2bf7ef9b5fd05ee6913aeeadb703c443 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 9bbf2b98ba11d00bd73e3254e15cfe17ccaff6ba 65daa322f1021d8206f8032c4cd4c0cb2d26c7c3 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 9bbf2b98ba11d00bd73e3254e15cfe17ccaff6ba 8dc662af019158690c470edd2e2857657f700abb git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 9bbf2b98ba11d00bd73e3254e15cfe17ccaff6ba 4daf432c94a42e7be6aa10b012b33af5ed9bc118 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.221 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.188 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.157 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.109 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.50 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.4 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3-rc1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"89628","cve":"CVE-2026-89628","epss":"0.002090000","percentile":"0.111260000","score_date":"2026-09-13","updated_at":"2026-09-14 00:18:02"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"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":"1a02056c2bf7ef9b5fd05ee6913aeeadb703c443","status":"affected","version":"9bbf2b98ba11d00bd73e3254e15cfe17ccaff6ba","versionType":"git"},{"lessThan":"65daa322f1021d8206f8032c4cd4c0cb2d26c7c3","status":"affected","version":"9bbf2b98ba11d00bd73e3254e15cfe17ccaff6ba","versionType":"git"},{"lessThan":"8dc662af019158690c470edd2e2857657f700abb","status":"affected","version":"9bbf2b98ba11d00bd73e3254e15cfe17ccaff6ba","versionType":"git"},{"lessThan":"4daf432c94a42e7be6aa10b012b33af5ed9bc118","status":"affected","version":"9bbf2b98ba11d00bd73e3254e15cfe17ccaff6ba","versionType":"git"},{"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":"5.10.*","status":"unaffected","version":"5.10.270","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.221","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.188","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.157","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"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.10.270","versionStartIncluding":"2.6.35","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.221","versionStartIncluding":"2.6.35","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.188","versionStartIncluding":"2.6.35","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.157","versionStartIncluding":"2.6.35","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.109","versionStartIncluding":"2.6.35","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.50","versionStartIncluding":"2.6.35","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.4","versionStartIncluding":"2.6.35","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3-rc1","versionStartIncluding":"2.6.35","vulnerable":true}],"negate":false,"operator":"OR"}]}],"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."}],"providerMetadata":{"dateUpdated":"2026-09-14T12:01:39.578Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/1a02056c2bf7ef9b5fd05ee6913aeeadb703c443"},{"url":"https://git.kernel.org/stable/c/65daa322f1021d8206f8032c4cd4c0cb2d26c7c3"},{"url":"https://git.kernel.org/stable/c/8dc662af019158690c470edd2e2857657f700abb"},{"url":"https://git.kernel.org/stable/c/4daf432c94a42e7be6aa10b012b33af5ed9bc118"},{"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"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-89628","datePublished":"2026-09-11T19:45:24.203Z","dateReserved":"2026-09-11T19:38:34.738Z","dateUpdated":"2026-09-14T12:01:39.578Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-11 20:19:48","lastModifiedDate":"2026-09-14 13:19:16","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"89628","Ordinal":"1","Title":"HID: picolcd: clamp eeprom debugfs read to bytes actually receiv","CVE":"CVE-2026-89628","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"89628","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"HID: picolcd: clamp eeprom debugfs read to bytes actually receiv"}]}}}