CVE-2026-89471

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-89471", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.710Z", "datePublished": "2026-09-11T19:43:29.867Z", "dateUpdated": "2026-10-19T08:47:20.319Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T08:47:20.319Z"}, "descriptions": [{"lang": "en", "value": "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 < charger->num_charger_ports; i++)\n\t\tcharger->ports[charger->num_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 < num_usbpd_ports ||\n\t num_charger_ports > 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 > 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."}], "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 overflow is in cros_usbpd_charger_probe(), reached when the Chrome OS EC MFD core instantiates the charger over LPC/eSPI/I2C/SPI and the driver reads EC_CMD_USB_PD_PORTS and EC_CMD_CHARGE_PORT_COUNT; USB-C PD is handled by the EC and there is no network or USB-packet path into this probe.\nAC:L - A malicious or compromised EC fully controls the two u8 port counts; reporting equal values N>8 (for example both 255) passes the mutual sanity check and deterministically writes N pointers past the 8-entry ports[] array with no race or attacker-uncontrollable layout.\nPR:N - The vulnerable probe runs automatically at boot when the CrOS EC advertises USB-PD; no Linux account, capability, or user-namespace privilege is required because the attacker is the EC supplying host-command responses, with no authentication on this path.\nUI:N - Driver enumeration and the overflowing registration loop execute during normal kernel boot or module load on Chromebooks, Framework laptops, and other CrOS-EC systems; no victim action such as plugging a peripheral or opening a device node is required.\nS:U - The slab out-of-bounds write corrupts kernel heap belonging to the same OS security authority as the charger driver; this is ordinary kernel memory corruption, not a VM escape or IOMMU/DMA boundary bypass.\nC:H - The loop writes up to 247 kernel pointers (~1976 bytes) past the kmalloc'd charger_data into adjacent slab objects; that heap corruption can be leveraged for kernel-memory disclosure.\nI:H - This is a slab out-of-bounds write of port_data pointers that smashes charger_data.notifier (including notifier_call) and neighboring heap objects, which is exploitable for control-flow hijacking.\nA:H - Overflowing the 8-entry ports[] array by hundreds of pointer writes corrupts SLUB metadata and adjacent objects and can oops or panic the kernel during probe."}]}], "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": "f68b883e8fad23ed0ac4756d91594809d78678ed", "lessThan": "0b5096f6804161b61451b1cec0e38678630be849", "status": "affected", "versionType": "git"}, {"version": "f68b883e8fad23ed0ac4756d91594809d78678ed", "lessThan": "c46c9f447415ca802afab51dea1eafc08ddff1c6", "status": "affected", "versionType": "git"}, {"version": "f68b883e8fad23ed0ac4756d91594809d78678ed", "lessThan": "a1905375dfc0b9612bbee52fc066e3a70c0d671d", "status": "affected", "versionType": "git"}, {"version": "f68b883e8fad23ed0ac4756d91594809d78678ed", "lessThan": "2746d502b12b343384fb747bdef9cbcfbd7444a2", "status": "affected", "versionType": "git"}, {"version": "f68b883e8fad23ed0ac4756d91594809d78678ed", "lessThan": "fd29d08ee487f3bf50f2575aaa74f78a74b09b21", "status": "affected", "versionType": "git"}, {"version": "f68b883e8fad23ed0ac4756d91594809d78678ed", "lessThan": "78be8b7403ff7638162438b664a07d19da76059e", "status": "affected", "versionType": "git"}, {"version": "f68b883e8fad23ed0ac4756d91594809d78678ed", "lessThan": "3d1e01443b221081258ff34ea0cdd0431e4ff62e", "status": "affected", "versionType": "git"}, {"version": "f68b883e8fad23ed0ac4756d91594809d78678ed", "lessThan": "48355ce49359740f52e94d3623f6fc557ce341f0", "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": "4.19", "status": "affected"}, {"version": "0", "lessThan": "4.19", "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": "4.19", "versionEndExcluding": "5.10.270"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19", "versionEndExcluding": "5.15.221"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19", "versionEndExcluding": "6.1.188"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19", "versionEndExcluding": "6.6.157"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19", "versionEndExcluding": "6.12.109"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19", "versionEndExcluding": "6.18.50"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19", "versionEndExcluding": "7.2.4"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19", "versionEndExcluding": "7.3"}]}]}], "references": [{"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"}], "title": "power: supply: cros_usbpd-charger: bound the EC-reported port count", "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": "0b5096f6804161b61451b1cec0e38678630be849", "status": "affected", "version": "f68b883e8fad23ed0ac4756d91594809d78678ed", "versionType": "git"}, {"lessThan": "c46c9f447415ca802afab51dea1eafc08ddff1c6", "status": "affected", "version": "f68b883e8fad23ed0ac4756d91594809d78678ed", "versionType": "git"}, {"lessThan": "a1905375dfc0b9612bbee52fc066e3a70c0d671d", "status": "affected", "version": "f68b883e8fad23ed0ac4756d91594809d78678ed", "versionType": "git"}, {"lessThan": "2746d502b12b343384fb747bdef9cbcfbd7444a2", "status": "affected", "version": "f68b883e8fad23ed0ac4756d91594809d78678ed", "versionType": "git"}, {"lessThan": "fd29d08ee487f3bf50f2575aaa74f78a74b09b21", "status": "affected", "version": "f68b883e8fad23ed0ac4756d91594809d78678ed", "versionType": "git"}, {"lessThan": "78be8b7403ff7638162438b664a07d19da76059e", "status": "affected", "version": "f68b883e8fad23ed0ac4756d91594809d78678ed", "versionType": "git"}, {"lessThan": "3d1e01443b221081258ff34ea0cdd0431e4ff62e", "status": "affected", "version": "f68b883e8fad23ed0ac4756d91594809d78678ed", "versionType": "git"}, {"lessThan": "48355ce49359740f52e94d3623f6fc557ce341f0", "status": "affected", "version": "f68b883e8fad23ed0ac4756d91594809d78678ed", "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": "4.19"}, {"lessThan": "4.19", "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-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 < charger->num_charger_ports; i++)\n\t\tcharger->ports[charger->num_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 < num_usbpd_ports ||\n\t num_charger_ports > 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 > 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", "lastModified": "2026-10-19T09:17:39.863", "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": "2026-09-11T20:19:28.263", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0b5096f6804161b61451b1cec0e38678630be849"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2746d502b12b343384fb747bdef9cbcfbd7444a2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3d1e01443b221081258ff34ea0cdd0431e4ff62e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/48355ce49359740f52e94d3623f6fc557ce341f0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/78be8b7403ff7638162438b664a07d19da76059e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a1905375dfc0b9612bbee52fc066e3a70c0d671d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c46c9f447415ca802afab51dea1eafc08ddff1c6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/fd29d08ee487f3bf50f2575aaa74f78a74b09b21"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: Linux kernel: cros_usbpd-charger: Memory corruption from excessive EC port count", "id": "2532398", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2532398"}, "csaw": false, "cvss3": {"cvss3_base_score": "6.4", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-787", "details": ["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 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."], "name": "CVE-2026-89471", "public_date": "2026-09-11T19:43:29Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-89471\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-89471\nhttps://git.kernel.org/stable/c/3d1e01443b221081258ff34ea0cdd0431e4ff62e\nhttps://git.kernel.org/stable/c/48355ce49359740f52e94d3623f6fc557ce341f0\nhttps://git.kernel.org/stable/c/78be8b7403ff7638162438b664a07d19da76059e\nhttps://git.kernel.org/stable/c/fd29d08ee487f3bf50f2575aaa74f78a74b09b21"], "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f68b883e8fad23ed0ac4756d91594809d78678ed,fd29d08ee487f3bf50f2575aaa74f78a74b09b21)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f68b883e8fad23ed0ac4756d91594809d78678ed,78be8b7403ff7638162438b664a07d19da76059e)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f68b883e8fad23ed0ac4756d91594809d78678ed,3d1e01443b221081258ff34ea0cdd0431e4ff62e)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[f68b883e8fad23ed0ac4756d91594809d78678ed,48355ce49359740f52e94d3623f6fc557ce341f0)"}}], "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": "semver", "value": "4.19"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,4.19)"}}, {"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": "semver", "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": "2026-09-12T16:30:13.326384+00:00", "updated": "2026-09-15T23:00:16.562086+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}