{"id":"CVE-2026-89470","title":"kernel: power: supply: cros_usbpd: Limit port counts to EC_USB_PD_MAX_PORTS (CVE-2026-89470)","summary":"A flaw was found in the Linux kernel's `cros_usbpd-charger` driver. This driver, which manages USB power delivery, incorrectly processes port count information from an embedded controller. A malicious embedded controller could provide an e…","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","cwe":"CWE-787","vendor":"Red Hat","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":"2026-09-15","sourceUpdated":"2026-09-15T09:43:00+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89470.json","references":[{"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"},{"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"}],"tags":["csaf","vex","red-hat","cve.org","score-dispute"],"epss":0.00144,"epssPercentile":0.04026,"scores":{"vendor":5.5,"cna":8.4},"ingestedAt":"2026-09-14T15:23:07.453Z","slug":"CVE-2026-89470","body":"## Overview\n\nA flaw was found in the Linux kernel's `cros_usbpd-charger` driver. This driver, which manages USB power delivery, incorrectly processes port count information from an embedded controller. A malicious embedded controller could provide an exaggerated port count, leading to an out-of-bounds write and subsequent memory corruption. This vulnerability could allow an attacker to cause system instability or potentially gain unauthorized control of the system.\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)\n\n**kernel: power: supply: cros_usbpd: Limit port counts to EC_USB_PD_MAX_PORTS** — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-15.\n\nNot affected:\n\n- Red Hat Enterprise Linux 10\n- Red Hat Enterprise Linux 6\n- Red Hat Enterprise Linux 7\n- Red Hat Enterprise Linux 8\n- Red Hat Enterprise Linux 9\n- Red Hat OpenShift Container Platform 4\n\n## Remediation\n\nRefer to the advisory for fix availability.","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"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"}]}