Vulnerability-Lookup

GHSA-XCHR-HVC5-JHVQ

Vulnerability from github – Published: 2026-09-11 21:31 – Updated: 2026-09-14 15:32

Details

In the Linux kernel, the following vulnerability has been resolved:

power: supply: cros_usbpd: Limit port counts to EC_USB_PD_MAX_PORTS

Currently the cros_usbpd-charger driver probe iterates based on raw charger port count returned by the embedded controller. The only check is against the number of USB PD ports which the embedded controller also defines. A malicious embedded controller could return an inaccurate port count (up to 255) resulting in an out of bounds write and subsequent memory corruption.

Update helper functions in cros_usbpd-charger to limit port counts to EC_USB_PD_MAX_PORTS.

Severity

8.4 (High)


                  
                    CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2026-89470"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-11T20:19:28Z",
    "severity": "HIGH"
  },
  "details": "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 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.",
  "id": "GHSA-xchr-hvc5-jhvq",
  "modified": "2026-09-14T15:32:25Z",
  "published": "2026-09-11T21:31:27Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-89470"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/304a29ac55ba3ee6eceaf7d83d09cd9709f3bf60"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3262977a05b23d1be9fc86727a2b490ec997543e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3ce9218639ff62d011eb8aca0943aa670a654c7b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4b1f2be1e1b74a50386ba718de3d62bfcf5ee701"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/657cd3a42e937276262c0a8ae6b01a87004309de"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/dce1750ddbd3380b1f6090dda2b07d2ebea2261d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/e951b65ef1699439079b723ca5c72cbe44771647"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fd5f289cca04ad869b34fc9ccb647670bfdb60ac"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-89470 (GCVE-0-2026-89470)

Vulnerability from cvelistv5 – Published: 2026-09-11 19:43 – Updated: 2026-09-14 12:00

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: power: supply: cros_usbpd: Limit port counts to EC_USB_PD_MAX_PORTS Currently the cros_usbpd-charger driver probe iterates based on raw charger port count returned by the embedded controller. The only check is against the number of USB PD ports which the embedded controller also defines. A malicious embedded controller could return an inaccurate port count (up to 255) resulting in an out of bounds write and subsequent memory corruption. Update helper functions in cros_usbpd-charger to limit port counts to EC_USB_PD_MAX_PORTS.

Severity

8.4 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Assigner

Linux mitre root

References

8 references

URL	Tags
https://git.kernel.org/stable/c/e951b65ef16994390…
https://git.kernel.org/stable/c/3ce9218639ff62d01…
https://git.kernel.org/stable/c/dce1750ddbd3380b1…
https://git.kernel.org/stable/c/3262977a05b23d1be…
https://git.kernel.org/stable/c/fd5f289cca04ad869…
https://git.kernel.org/stable/c/4b1f2be1e1b74a503…
https://git.kernel.org/stable/c/304a29ac55ba3ee6e…
https://git.kernel.org/stable/c/657cd3a42e9372762…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 3af15cfacd1eef7f223802d49a88cae23c509183 , < e951b65ef1699439079b723ca5c72cbe44771647 (git) Affected: 3af15cfacd1eef7f223802d49a88cae23c509183 , < 3ce9218639ff62d011eb8aca0943aa670a654c7b (git) Affected: 3af15cfacd1eef7f223802d49a88cae23c509183 , < dce1750ddbd3380b1f6090dda2b07d2ebea2261d (git) Affected: 3af15cfacd1eef7f223802d49a88cae23c509183 , < 3262977a05b23d1be9fc86727a2b490ec997543e (git) Affected: 3af15cfacd1eef7f223802d49a88cae23c509183 , < fd5f289cca04ad869b34fc9ccb647670bfdb60ac (git) Affected: 3af15cfacd1eef7f223802d49a88cae23c509183 , < 4b1f2be1e1b74a50386ba718de3d62bfcf5ee701 (git) Affected: 3af15cfacd1eef7f223802d49a88cae23c509183 , < 304a29ac55ba3ee6eceaf7d83d09cd9709f3bf60 (git) Affected: 3af15cfacd1eef7f223802d49a88cae23c509183 , < 657cd3a42e937276262c0a8ae6b01a87004309de (git)
Linux	Linux	Affected: 4.20 Unaffected: 0 , < 4.20 (semver) Unaffected: 5.10.270 , ≤ 5.10.* (semver) Unaffected: 5.15.221 , ≤ 5.15.* (semver) Unaffected: 6.1.188 , ≤ 6.1.* (semver) Unaffected: 6.6.157 , ≤ 6.6.* (semver) Unaffected: 6.12.109 , ≤ 6.12.* (semver) Unaffected: 6.18.50 , ≤ 6.18.* (semver) Unaffected: 7.2.4 , ≤ 7.2.* (semver) Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/power/supply/cros_usbpd-charger.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "e951b65ef1699439079b723ca5c72cbe44771647",
              "status": "affected",
              "version": "3af15cfacd1eef7f223802d49a88cae23c509183",
              "versionType": "git"
            },
            {
              "lessThan": "3ce9218639ff62d011eb8aca0943aa670a654c7b",
              "status": "affected",
              "version": "3af15cfacd1eef7f223802d49a88cae23c509183",
              "versionType": "git"
            },
            {
              "lessThan": "dce1750ddbd3380b1f6090dda2b07d2ebea2261d",
              "status": "affected",
              "version": "3af15cfacd1eef7f223802d49a88cae23c509183",
              "versionType": "git"
            },
            {
              "lessThan": "3262977a05b23d1be9fc86727a2b490ec997543e",
              "status": "affected",
              "version": "3af15cfacd1eef7f223802d49a88cae23c509183",
              "versionType": "git"
            },
            {
              "lessThan": "fd5f289cca04ad869b34fc9ccb647670bfdb60ac",
              "status": "affected",
              "version": "3af15cfacd1eef7f223802d49a88cae23c509183",
              "versionType": "git"
            },
            {
              "lessThan": "4b1f2be1e1b74a50386ba718de3d62bfcf5ee701",
              "status": "affected",
              "version": "3af15cfacd1eef7f223802d49a88cae23c509183",
              "versionType": "git"
            },
            {
              "lessThan": "304a29ac55ba3ee6eceaf7d83d09cd9709f3bf60",
              "status": "affected",
              "version": "3af15cfacd1eef7f223802d49a88cae23c509183",
              "versionType": "git"
            },
            {
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              "status": "affected",
              "version": "3af15cfacd1eef7f223802d49a88cae23c509183",
              "versionType": "git"
            }
          ]
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        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/power/supply/cros_usbpd-charger.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.20"
            },
            {
              "lessThan": "4.20",
              "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": "4.20",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.221",
                  "versionStartIncluding": "4.20",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.188",
                  "versionStartIncluding": "4.20",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.157",
                  "versionStartIncluding": "4.20",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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                  "versionStartIncluding": "4.20",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.50",
                  "versionStartIncluding": "4.20",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.4",
                  "versionStartIncluding": "4.20",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3-rc1",
                  "versionStartIncluding": "4.20",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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 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."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 8.4,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The OOB write is in cros_usbpd_charger_probe() on the Chrome OS EC platform path (LPC/eSPI/I2C/SPI/UART/ISHTP \u2192 cros_ec_cmd_xfer_status \u2192 MFD cell cros-usbpd-charger). Port counts come from the onboard EC, not from network packets or a USB-C partner, so the highest defensible vector is local.\nAC:L - A malicious or compromised EC fully controls both u8 replies (EC_CMD_USB_PD_PORTS and EC_CMD_CHARGE_PORT_COUNT). Setting them equal and greater than 8 (for example both 255) passes the relative sanity check and makes the probe loop overflow ports[EC_USB_PD_MAX_PORTS] deterministically, with no race or layout lottery.\nPR:N - ec_device_probe() auto-adds the charger cell when the EC advertises USB-PD and probe then trusts EC replies with no Linux capability or credential check. Supply-chain or already-compromised EC firmware needs no host account, matching other firmware-at-probe kernel CNA scores.\nUI:N - The charger driver probes automatically during Chrome OS EC MFD bring-up at boot or module load. No victim action such as plugging a cable, mounting a filesystem, or opening a device node is required.\nS:U - Impact is kernel slab corruption and possible code execution on the same host that runs the charger driver. This is not a VM escape, IOMMU/DMA boundary bypass, or other cross-authority breakout.\nC:H - The probe writes up to 247 pointers past the 8-entry ports[] array in the kmalloc\u0027d charger_data (about 1976 bytes on 64-bit), corrupting adjacent slab objects. That heap overflow can be turned into an arbitrary-read primitive, not a small bounded leak.\nI:H - The overflow stores attacker-timed port_data pointers past ports[] (and can also overflow each port\u0027s name[] via sprintf for i\u003e=10), enabling adjacent-object corruption, control-flow hijack, and arbitrary write.\nA:H - Smashing charger_data\u0027s trailing notifier_block and neighboring slab objects during probe can oops or panic the kernel on Chromebooks and other Chrome OS EC systems, a full availability loss."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-14T12:00:07.466Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "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"
        }
      ],
      "title": "power: supply: cros_usbpd: Limit port counts to EC_USB_PD_MAX_PORTS",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-89470",
    "datePublished": "2026-09-11T19:43:29.206Z",
    "dateReserved": "2026-09-11T19:38:34.710Z",
    "dateUpdated": "2026-09-14T12:00:07.466Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

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