CVE-2024-35924

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In order to avoid overflowing reads for older\nsystems, add a mechanism to use the read UCSI version to truncate read\nsizes on UCSI v1.2."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "baseScore": 7.1, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The UCSI core is a local platform driver (ACPI OpRegion, I2C, or pmic_glink transport) with no network or adjacent-network exposure; the over-read is driven by local UCSI transactions and the leaked bytes are harvested locally through /sys/class/typec and /sys/class/power_supply attributes or the UCSI debugfs response file.\nAC:L - There is no race and no dependence on memory layout the attacker cannot influence \u2014 any UCSI command requesting more than 16 bytes on a PPM reporting version \u22641.2 deterministically reads past the MESSAGE_IN window, and UCSI 1.x PPMs were the common case on shipping hardware.\nPR:L - The typec class attributes populated from the over-read buffers (usb_power_delivery_revision, number_of_alternate_modes, power_operation_mode, supported_accessory_modes) and the ucsi power-supply properties derived from src_pdos are all DEVICE_ATTR_RO/0444, so an ordinary unprivileged local user can read the disclosed bytes; no capability or root is required to observe the leak.\nUI:N - The oversized MESSAGE_IN reads are issued by the driver itself during registration, resume, and connector-change work handling; no victim action is needed for the out-of-bounds access to occur or for its results to be exposed.\nS:U - The out-of-bounds read stays within the kernel's own memory (memremap'd OpRegion, or the slab objects backing struct pmic_glink_ucsi / struct ucsi_ccg) and is consumed by the same kernel; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - Up to 240 bytes beyond the 16-byte MESSAGE_IN window can be copied out \u2014 past read_buf[48] inside struct pmic_glink_ucsi, past the trailing op_data member of struct ucsi_ccg, or past the ACPI OpRegion \u2014 which is far more than a strictly bounded few-byte read and can expose adjacent heap contents (including pointers) through world-readable sysfs.\nI:N - The defect is purely an over-long read; every destination buffer is sized to the requested length, so no out-of-bounds write, allocation-size confusion, or control-flow corruption primitive is created.\nA:H - 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In order to avoid overflowing reads for older\nsystems, add a mechanism to use the read UCSI version to truncate read\nsizes on UCSI v1.2."}, {"lang": "es", "value": "En el kernel de Linux se ha resuelto la siguiente vulnerabilidad: usb: typec: ucsi: Limitar el tama\u00f1o de lectura en v1.2 Entre UCSI 1.2 y UCSI 2.0, el tama\u00f1o de la regi\u00f3n MESSAGE_IN se increment\u00f3 de 16 a 256. Para evitar el desbordamiento lecturas para sistemas m\u00e1s antiguos, agregue un mecanismo para usar la versi\u00f3n de lectura UCSI para truncar los tama\u00f1os de lectura en UCSI v1.2."}], "id": "CVE-2024-35924", "lastModified": "2026-10-30T13:17:27.063", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.2, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2024-35924", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-05-20T15:11:13.299971Z", "version": "2.0.3"}}]}, "published": "2024-05-19T11:15:48.653", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/0defcaa09d3b21e8387829ee3a652c43fa91e13f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/266f403ec47573046dee4bcebda82777ce702c40"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/af9bdf05557dc21040df2f11062133dd1e503a09"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b3db266fb031fba88c423d4bb8983a73a3db6527"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/0defcaa09d3b21e8387829ee3a652c43fa91e13f"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/266f403ec47573046dee4bcebda82777ce702c40"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b3db266fb031fba88c423d4bb8983a73a3db6527"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2024:5102", "cpe": "cpe:/a:redhat:enterprise_linux:8::nfv", "package": "kernel-rt-0:4.18.0-553.16.1.rt7.357.el8_10", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2024-08-08T00:00:00Z"}, {"advisory": "RHSA-2024:5101", "cpe": "cpe:/o:redhat:enterprise_linux:8", "package": "kernel-0:4.18.0-553.16.1.el8_10", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2024-08-08T00:00:00Z"}, {"advisory": "RHSA-2024:9315", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-503.11.1.el9_5", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2024-11-12T00:00:00Z"}, {"advisory": "RHSA-2024:9315", "cpe": "cpe:/o:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-503.11.1.el9_5", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2024-11-12T00:00:00Z"}, {"advisory": "RHSA-2025:10701", "cpe": "cpe:/a:redhat:rhel_eus:9.4", "package": "kernel-0:5.14.0-427.76.1.el9_4", "product_name": "Red Hat Enterprise Linux 9.4 Extended Update Support", "release_date": "2025-07-09T00:00:00Z"}], "bugzilla": {"description": "kernel: usb: typec: ucsi: Limit read size on v1.2", "id": "2281758", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2281758"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "verified"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nusb: typec: ucsi: Limit read size on v1.2\nBetween UCSI 1.2 and UCSI 2.0, the size of the MESSAGE_IN region was\nincreased from 16 to 256. In order to avoid overflowing reads for older\nsystems, add a mechanism to use the read UCSI version to truncate read\nsizes on UCSI v1.2."], "name": "CVE-2024-35924", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-05-19T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-35924\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-35924\nhttps://lore.kernel.org/linux-cve-announce/2024051914-CVE-2024-35924-90f6@gregkh/T"], "threat_severity": "Low"}

{}