CVE-2023-53049

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Cuando ucsi_init() falla, ucsi->connector es nulo; sin embargo, en el caso de ucsi_acpi, a\u00fan pueden aparecer eventos que provocan que el c\u00f3digo ucs_acpi llame a ucsi_connector_change(), que a su vez desreferencia el puntero nulo ucsi->connector. Para solucionar esto, no configure ucsi->ntfy dentro de ucsi_init() hasta que ucsi_init() se haya ejecutado correctamente, de modo que ucsi_connector_change() ignore los eventos, ya que UCSI_ENABLE_NTFY_CONNECTOR_CHANGE no est\u00e1 configurado en la m\u00e1scara ntfy."}], "id": "CVE-2023-53049", "lastModified": "2026-11-05T21:17:09.000", "metrics": {"cvssMetricV31": [{"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-2023-53049", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-11-05T20:15:26.195648Z", "version": "2.0.3"}}]}, "published": "2025-05-02T16:15:23.990", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/1c5abcb13491da8c049f20462189c12c753ba978"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/7dd27aed9c456670b3882877ef17a48195f21693"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/7ef0423e43f877a328454059d46763043ce3da44"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a6adfe9bbd6ac11e398b54ccd99a0f8eea09f3c0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f87fb985452ab2083967103ac00bfd68fb182764"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: usb: ucsi: Fix NULL pointer deref in ucsi_connector_change()", "id": "2363723", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2363723"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.4", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nusb: ucsi: Fix NULL pointer deref in ucsi_connector_change()\nWhen ucsi_init() fails, ucsi->connector is NULL, yet in case of\nucsi_acpi we may still get events which cause the ucs_acpi code to call\nucsi_connector_change(), which then derefs the NULL ucsi->connector\npointer.\nFix this by not setting ucsi->ntfy inside ucsi_init() until ucsi_init()\nhas succeeded, so that ucsi_connector_change() ignores the events\nbecause UCSI_ENABLE_NTFY_CONNECTOR_CHANGE is not set in the ntfy mask."], "name": "CVE-2023-53049", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"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:8", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2025-05-02T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2023-53049\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-53049\nhttps://lore.kernel.org/linux-cve-announce/2025050205-CVE-2023-53049-10de@gregkh/T"], "statement": "A NULL pointer dereference vulnerability in the UCSI USB Type-C subsystem was fixed in ucsi_connector_change(). If ucsi_init() fails, a race condition may cause connector change events to be processed with an uninitialized ucsi->connector, leading to a kernel crash. This can be triggered locally from userspace on systems with UCSI ACPI interface, but requires high privileges and a specific device configuration.", "threat_severity": "Low"}

{"created": "2025-06-23T09:16:30.101716+00:00", "updated": "2025-06-23T09:16:30.101796+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}