{"id":"CVE-2026-89471","title":"kernel: power: supply: cros_usbpd-charger: bound the EC-reported port count (CVE-2026-89471)","summary":"A flaw was found in the Linux kernel's `cros_usbpd-charger` driver. A malicious or compromised embedded controller (EC) can report an excessive number of USB Power Delivery (PD) ports. This causes the driver to write beyond the allocated m…","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":"Red Hat OpenShift Container Platform 4","affected":["openshift_container_platform 4"],"published":"2026-09-11","updated":"2026-09-18","sourceUpdated":"2026-09-18T21:10:58+00:00","source":"CSAF","sourceUrl":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89471.json","references":[{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89471.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-89471"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532398"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-89471"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89471"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89471.mbox"},{"url":"https://git.kernel.org/stable/c/0b5096f6804161b61451b1cec0e38678630be849"},{"url":"https://git.kernel.org/stable/c/c46c9f447415ca802afab51dea1eafc08ddff1c6"},{"url":"https://git.kernel.org/stable/c/a1905375dfc0b9612bbee52fc066e3a70c0d671d"},{"url":"https://git.kernel.org/stable/c/2746d502b12b343384fb747bdef9cbcfbd7444a2"},{"url":"https://git.kernel.org/stable/c/fd29d08ee487f3bf50f2575aaa74f78a74b09b21"},{"url":"https://git.kernel.org/stable/c/78be8b7403ff7638162438b664a07d19da76059e"},{"url":"https://git.kernel.org/stable/c/3d1e01443b221081258ff34ea0cdd0431e4ff62e"},{"url":"https://git.kernel.org/stable/c/48355ce49359740f52e94d3623f6fc557ce341f0"}],"tags":["csaf","vex","red-hat","cve.org","score-dispute"],"epss":0.00144,"epssPercentile":0.04024,"scores":{"vendor":5.5,"cna":8.4},"ingestedAt":"2026-09-14T15:23:07.453Z","slug":"CVE-2026-89471","body":"## Overview\n\nA flaw was found in the Linux kernel's `cros_usbpd-charger` driver. A malicious or compromised embedded controller (EC) can report an excessive number of USB Power Delivery (PD) ports. This causes the driver to write beyond the allocated memory buffer when populating a fixed-size array for port data, leading to a slab out-of-bounds write. This memory corruption could potentially be exploited by a local attacker.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · updated 2026-09-18 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89471.json)\n\n**kernel: power: supply: cros_usbpd-charger: bound the EC-reported port count** — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-18.\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":206970,"id":"CVE-2026-89471","ts":1789749723675,"field":"cvss","old":"8.4","new":"5.5"},{"seq":206969,"id":"CVE-2026-89471","ts":1789749723675,"field":"severity","old":"high","new":"medium"},{"seq":198038,"id":"CVE-2026-89471","ts":1789384321498,"field":"cvss","old":"6.4","new":"8.4"},{"seq":198037,"id":"CVE-2026-89471","ts":1789384321498,"field":"severity","old":"medium","new":"high"},{"seq":183801,"id":"CVE-2026-89471","ts":1789356677450,"field":"cvss","old":"8.4","new":"6.4"},{"seq":183800,"id":"CVE-2026-89471","ts":1789356677450,"field":"severity","old":"high","new":"medium"},{"seq":153248,"id":"CVE-2026-89471","ts":1789285349730,"field":"cvss","old":null,"new":"8.4"},{"seq":153247,"id":"CVE-2026-89471","ts":1789285349730,"field":"severity","old":"none","new":"high"},{"seq":147271,"id":"CVE-2026-89471","ts":1789270205971,"field":"cvss","old":null,"new":"6.4"},{"seq":147270,"id":"CVE-2026-89471","ts":1789270205971,"field":"severity","old":"none","new":"medium"},{"seq":109018,"id":"CVE-2026-89471","ts":1789183729981,"field":"cvss","old":null,"new":"6.4"},{"seq":109017,"id":"CVE-2026-89471","ts":1789183729981,"field":"severity","old":"none","new":"medium"}]}