CVE-2026-89470

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-89470", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.710Z", "datePublished": "2026-09-11T19:43:29.206Z", "dateUpdated": "2026-10-19T08:47:19.356Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T08:47:19.356Z"}, "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": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.4, "baseSeverity": "HIGH"}, "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'd 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's name[] via sprintf for i>=10), enabling adjacent-object corruption, control-flow hijack, and arbitrary write.\nA:H - Smashing charger_data's 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."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/power/supply/cros_usbpd-charger.c"], "versions": [{"version": "3af15cfacd1eef7f223802d49a88cae23c509183", "lessThan": "e951b65ef1699439079b723ca5c72cbe44771647", "status": "affected", "versionType": "git"}, {"version": "3af15cfacd1eef7f223802d49a88cae23c509183", "lessThan": "3ce9218639ff62d011eb8aca0943aa670a654c7b", "status": "affected", "versionType": "git"}, {"version": "3af15cfacd1eef7f223802d49a88cae23c509183", "lessThan": "dce1750ddbd3380b1f6090dda2b07d2ebea2261d", "status": "affected", "versionType": "git"}, {"version": "3af15cfacd1eef7f223802d49a88cae23c509183", "lessThan": "3262977a05b23d1be9fc86727a2b490ec997543e", "status": "affected", "versionType": "git"}, {"version": "3af15cfacd1eef7f223802d49a88cae23c509183", "lessThan": "fd5f289cca04ad869b34fc9ccb647670bfdb60ac", "status": "affected", "versionType": "git"}, {"version": "3af15cfacd1eef7f223802d49a88cae23c509183", "lessThan": "4b1f2be1e1b74a50386ba718de3d62bfcf5ee701", "status": "affected", "versionType": "git"}, {"version": "3af15cfacd1eef7f223802d49a88cae23c509183", "lessThan": "304a29ac55ba3ee6eceaf7d83d09cd9709f3bf60", "status": "affected", "versionType": "git"}, {"version": "3af15cfacd1eef7f223802d49a88cae23c509183", "lessThan": "657cd3a42e937276262c0a8ae6b01a87004309de", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/power/supply/cros_usbpd-charger.c"], "versions": [{"version": "4.20", "status": "affected"}, {"version": "0", "lessThan": "4.20", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.270", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.221", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.188", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.157", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.109", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.50", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.4", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.20", "versionEndExcluding": "5.10.270"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.20", "versionEndExcluding": "5.15.221"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.20", "versionEndExcluding": "6.1.188"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.20", "versionEndExcluding": "6.6.157"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.20", "versionEndExcluding": "6.12.109"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.20", "versionEndExcluding": "6.18.50"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.20", "versionEndExcluding": "7.2.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.20", "versionEndExcluding": "7.3"}]}]}], "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"}}}}

{}

{"affected": [{"affectedData": [{"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"}, {"lessThan": "657cd3a42e937276262c0a8ae6b01a87004309de", "status": "affected", "version": "3af15cfacd1eef7f223802d49a88cae23c509183", "versionType": "git"}]}, {"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", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "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."}], "id": "CVE-2026-89470", "lastModified": "2026-10-19T09:17:39.710", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 8.4, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.5, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-09-11T20:19:28.140", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/304a29ac55ba3ee6eceaf7d83d09cd9709f3bf60"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3262977a05b23d1be9fc86727a2b490ec997543e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3ce9218639ff62d011eb8aca0943aa670a654c7b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4b1f2be1e1b74a50386ba718de3d62bfcf5ee701"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/657cd3a42e937276262c0a8ae6b01a87004309de"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/dce1750ddbd3380b1f6090dda2b07d2ebea2261d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e951b65ef1699439079b723ca5c72cbe44771647"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/fd5f289cca04ad869b34fc9ccb647670bfdb60ac"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Linux kernel: Memory corruption in USB power delivery driver", "id": "2532525", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2532525"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.4", "cvss3_scoring_vector": "CVSS:3.1/AV:P/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:H", "status": "draft"}, "cwe": "CWE-787", "details": ["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 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."], "name": "CVE-2026-89470", "public_date": "2026-09-11T19:43:29Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-89470\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-89470\nhttps://git.kernel.org/stable/c/304a29ac55ba3ee6eceaf7d83d09cd9709f3bf60\nhttps://git.kernel.org/stable/c/4b1f2be1e1b74a50386ba718de3d62bfcf5ee701\nhttps://git.kernel.org/stable/c/657cd3a42e937276262c0a8ae6b01a87004309de\nhttps://git.kernel.org/stable/c/fd5f289cca04ad869b34fc9ccb647670bfdb60ac"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[3af15cfacd1eef7f223802d49a88cae23c509183,fd5f289cca04ad869b34fc9ccb647670bfdb60ac)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[3af15cfacd1eef7f223802d49a88cae23c509183,4b1f2be1e1b74a50386ba718de3d62bfcf5ee701)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[3af15cfacd1eef7f223802d49a88cae23c509183,304a29ac55ba3ee6eceaf7d83d09cd9709f3bf60)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[3af15cfacd1eef7f223802d49a88cae23c509183,657cd3a42e937276262c0a8ae6b01a87004309de)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "4.20"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,4.20)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.109,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.50,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.4,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.3-rc1,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-09-12T19:00:08.845687+00:00", "updated": "2026-09-15T23:00:16.562675+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}