{"id":"CVE-2026-89470","title":"power: supply: cros_usbpd: Limit port counts to EC_USB_PD_MAX_PORTS","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\npower: supply: cros_usbpd: Limit port counts to EC_USB_PD_MAX_PORTS\n\nCurrently the cros_usbpd-charger driver probe iterates based on raw\ncharger port count returned by …","severity":"high","cvss":8.4,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cvssSource":"cna","cwe":["CWE-787"],"vendor":"Linux","product":"Linux","affected":["Linux >= 3af15cfacd1eef7f223802d49a88cae23c509183 < e951b65ef1699439079b723ca5c72cbe44771647","Linux >= 3af15cfacd1eef7f223802d49a88cae23c509183 < 3ce9218639ff62d011eb8aca0943aa670a654c7b","Linux >= 3af15cfacd1eef7f223802d49a88cae23c509183 < dce1750ddbd3380b1f6090dda2b07d2ebea2261d","Linux >= 3af15cfacd1eef7f223802d49a88cae23c509183 < 3262977a05b23d1be9fc86727a2b490ec997543e","Linux >= 3af15cfacd1eef7f223802d49a88cae23c509183 < fd5f289cca04ad869b34fc9ccb647670bfdb60ac","Linux >= 3af15cfacd1eef7f223802d49a88cae23c509183 < 4b1f2be1e1b74a50386ba718de3d62bfcf5ee701","Linux >= 3af15cfacd1eef7f223802d49a88cae23c509183 < 304a29ac55ba3ee6eceaf7d83d09cd9709f3bf60","Linux >= 3af15cfacd1eef7f223802d49a88cae23c509183 < 657cd3a42e937276262c0a8ae6b01a87004309de","Linux 4.20"],"published":"2026-09-11","updated":"2026-10-19","sourceUpdated":"2026-10-19T08:47:19.356Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-89470","references":[{"url":"https://git.kernel.org/stable/c/e951b65ef1699439079b723ca5c72cbe44771647"},{"url":"https://git.kernel.org/stable/c/3ce9218639ff62d011eb8aca0943aa670a654c7b"},{"url":"https://git.kernel.org/stable/c/dce1750ddbd3380b1f6090dda2b07d2ebea2261d"},{"url":"https://git.kernel.org/stable/c/3262977a05b23d1be9fc86727a2b490ec997543e"},{"url":"https://git.kernel.org/stable/c/fd5f289cca04ad869b34fc9ccb647670bfdb60ac"},{"url":"https://git.kernel.org/stable/c/4b1f2be1e1b74a50386ba718de3d62bfcf5ee701"},{"url":"https://git.kernel.org/stable/c/304a29ac55ba3ee6eceaf7d83d09cd9709f3bf60"},{"url":"https://git.kernel.org/stable/c/657cd3a42e937276262c0a8ae6b01a87004309de"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89470.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-89470"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532525"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-89470"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89470"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89470.mbox"}],"tags":["cve.org","csaf","vex","red-hat","score-dispute"],"epss":0.00142,"epssPercentile":0.0345,"scores":{"cna":8.4,"vendor":5.5},"ingestedAt":"2026-09-14T15:23:07.453Z","slug":"CVE-2026-89470","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\npower: supply: cros_usbpd: Limit port counts to EC_USB_PD_MAX_PORTS\n\nCurrently the cros_usbpd-charger driver probe iterates based on raw\ncharger port count returned by the embedded controller. The only check\nis against the number of USB PD ports which the embedded controller\nalso defines. A malicious embedded controller could return an inaccurate\nport count (up to 255) resulting in an out of bounds write and\nsubsequent memory corruption.\n\nUpdate helper functions in cros_usbpd-charger to limit port counts to\nEC_USB_PD_MAX_PORTS.\n\n## Affected\n\n- `Linux >= 3af15cfacd1eef7f223802d49a88cae23c509183 < e951b65ef1699439079b723ca5c72cbe44771647`\n- `Linux >= 3af15cfacd1eef7f223802d49a88cae23c509183 < 3ce9218639ff62d011eb8aca0943aa670a654c7b`\n- `Linux >= 3af15cfacd1eef7f223802d49a88cae23c509183 < dce1750ddbd3380b1f6090dda2b07d2ebea2261d`\n- `Linux >= 3af15cfacd1eef7f223802d49a88cae23c509183 < 3262977a05b23d1be9fc86727a2b490ec997543e`\n- `Linux >= 3af15cfacd1eef7f223802d49a88cae23c509183 < fd5f289cca04ad869b34fc9ccb647670bfdb60ac`\n- `Linux >= 3af15cfacd1eef7f223802d49a88cae23c509183 < 4b1f2be1e1b74a50386ba718de3d62bfcf5ee701`\n- `Linux >= 3af15cfacd1eef7f223802d49a88cae23c509183 < 304a29ac55ba3ee6eceaf7d83d09cd9709f3bf60`\n- `Linux >= 3af15cfacd1eef7f223802d49a88cae23c509183 < 657cd3a42e937276262c0a8ae6b01a87004309de`\n- `Linux 4.20`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · updated 2026-09-15 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89470.json)","depth":"twilight","depthScore":46,"depthScoreParts":{"impact":46.2,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":224748,"id":"CVE-2026-89470","ts":1792401518755,"field":"cvss","old":"5.5","new":"8.4"},{"seq":224747,"id":"CVE-2026-89470","ts":1792401518755,"field":"severity","old":"medium","new":"high"},{"seq":203922,"id":"CVE-2026-89470","ts":1789490222762,"field":"cvss","old":"8.4","new":"5.5"},{"seq":203921,"id":"CVE-2026-89470","ts":1789490222762,"field":"severity","old":"high","new":"medium"},{"seq":198042,"id":"CVE-2026-89470","ts":1789384321515,"field":"cvss","old":"5.4","new":"8.4"},{"seq":198041,"id":"CVE-2026-89470","ts":1789384321515,"field":"severity","old":"medium","new":"high"},{"seq":183538,"id":"CVE-2026-89470","ts":1789356675797,"field":"cvss","old":"8.4","new":"5.4"},{"seq":183537,"id":"CVE-2026-89470","ts":1789356675797,"field":"severity","old":"high","new":"medium"},{"seq":153246,"id":"CVE-2026-89470","ts":1789285349721,"field":"cvss","old":null,"new":"8.4"},{"seq":153245,"id":"CVE-2026-89470","ts":1789285349721,"field":"severity","old":"none","new":"high"},{"seq":147079,"id":"CVE-2026-89470","ts":1789270195080,"field":"cvss","old":null,"new":"5.4"},{"seq":147078,"id":"CVE-2026-89470","ts":1789270195080,"field":"severity","old":"none","new":"medium"}]}