{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "f68b883e8fad23ed0ac4756d91594809d78678ed"
            },
            {
              "fixed": "0b5096f6804161b61451b1cec0e38678630be849"
            },
            {
              "fixed": "c46c9f447415ca802afab51dea1eafc08ddff1c6"
            },
            {
              "fixed": "a1905375dfc0b9612bbee52fc066e3a70c0d671d"
            },
            {
              "fixed": "2746d502b12b343384fb747bdef9cbcfbd7444a2"
            },
            {
              "fixed": "fd29d08ee487f3bf50f2575aaa74f78a74b09b21"
            },
            {
              "fixed": "78be8b7403ff7638162438b664a07d19da76059e"
            },
            {
              "fixed": "3d1e01443b221081258ff34ea0cdd0431e4ff62e"
            },
            {
              "fixed": "48355ce49359740f52e94d3623f6fc557ce341f0"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "4.19.0"
            },
            {
              "fixed": "5.10.270"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.11.0"
            },
            {
              "fixed": "5.15.221"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "5.16.0"
            },
            {
              "fixed": "6.1.188"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.2.0"
            },
            {
              "fixed": "6.6.157"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.109"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.50"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "7.2.4"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89471.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\npower: supply: cros_usbpd-charger: bound the EC-reported port count\n\ncros_usbpd_charger_probe() reads two port counts from the EC and uses\none of them, num_charger_ports, as the loop bound when populating a\nfixed-size array:\n\n\tstruct port_data *ports[EC_USB_PD_MAX_PORTS];\t/* 8 entries */\n\t...\n\tfor (i = 0; i \u003c charger-\u003enum_charger_ports; i++)\n\t\tcharger-\u003eports[charger-\u003enum_registered_psy++] = port;\n\nBoth num_usbpd_ports (from EC_CMD_USB_PD_PORTS) and num_charger_ports\n(from EC_CMD_CHARGE_PORT_COUNT) are u8 values reported by the EC. The\nonly validation is a sanity check that compares the two EC-reported\nvalues against each other:\n\n\tif (num_charger_ports \u003c num_usbpd_ports ||\n\t    num_charger_ports \u003e num_usbpd_ports + 1)\n\t\treturn -EPROTO;\n\nIt never checks either count against EC_USB_PD_MAX_PORTS, the size of\nthe ports[] array. A malfunctioning, malicious or compromised EC that\nreports num_usbpd_ports == num_charger_ports == N for any N \u003e 8 (for\nexample both 255) passes this check, and the loop then writes N pointers\ninto the 8-entry ports[] array embedded in the devm_kzalloc()'d\ncharger_data, overflowing it by up to 255 - 8 = 247 entries (~1976\nbytes): a slab out-of-bounds write.\n\nReject a port count larger than the ports[] array can hold.",
  "id": "CVE-2026-89471",
  "modified": "2026-09-15T03:30:52.691702084Z",
  "published": "2026-09-11T19:43:29.867Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0b5096f6804161b61451b1cec0e38678630be849"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2746d502b12b343384fb747bdef9cbcfbd7444a2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3d1e01443b221081258ff34ea0cdd0431e4ff62e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/48355ce49359740f52e94d3623f6fc557ce341f0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/78be8b7403ff7638162438b664a07d19da76059e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a1905375dfc0b9612bbee52fc066e3a70c0d671d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c46c9f447415ca802afab51dea1eafc08ddff1c6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fd29d08ee487f3bf50f2575aaa74f78a74b09b21"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/89xxx/CVE-2026-89471.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-89471"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "power: supply: cros_usbpd-charger: bound the EC-reported port count"
}