CVE-2026-43092

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Furthermore, validate whether underlying HW will\nbe able to satisfy configured MTU wrt XSK's frame size multiplied by\nsupported Rx buffer chain length (that is exposed via\nnet_device::xdp_zc_max_segs)."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nxsk: validar MTU contra el tama\u00f1o de trama utilizable al enlazar\n\nEl enlace AF_XDP actualmente acepta configuraciones de pool de copia cero sin verificar que la MTU del dispositivo encaja en el espacio de trama utilizable proporcionado por el fragmento UMEM.\n\nEsto se convierte en un problema desde que empezamos a respetar el tailroom que se resta del chunk_size (junto con el headroom). Un tama\u00f1o de fragmento de 2k podr\u00eda no proporcionar suficiente espacio para una MTU est\u00e1ndar de 1500, as\u00ed que detectemos tales configuraciones en el momento del enlace. Adem\u00e1s, validar si el HW subyacente podr\u00e1 satisfacer la MTU configurada con respecto al tama\u00f1o de trama de XSK multiplicado por la longitud de cadena de b\u00fafer Rx soportada (que se expone a trav\u00e9s de net_device::xdp_zc_max_segs)."}], "id": "CVE-2026-43092", "lastModified": "2026-11-11T21:10:00.200", "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"}]}, "published": "2026-05-06T10:16:22.550", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/25e1e91a8da819924df0b16e3812d7b24c8ce133"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/36ee60b569ba0dfb6f961333b90d19ab5b323fa9"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a55793e5a97d4e39bdb380873a9780fe0010bff6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b2f4daa6422fd6cc0cec969794dab4a88ea4cea1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f669d60db11dbabb96279f2b20f9d1cba43cddb2"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: xsk: validate MTU against usable frame size on bind", "id": "2467008", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2467008"}, "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": "draft"}, "cwe": "CWE-1284", "details": ["A flaw was found in the Linux kernel's AF_XDP (eXpress Data Path) subsystem. The AF_XDP bind operation fails to validate the Maximum Transmission Unit (MTU) against the usable frame space provided by the UMEM (User Memory) chunk. This can lead to situations where the configured MTU does not fit, potentially causing network communication failures or system instability. A local attacker could potentially leverage this vulnerability to disrupt network services, resulting in a denial of service."], "name": "CVE-2026-43092", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "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": "2026-05-06T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-43092\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-43092\nhttps://lore.kernel.org/linux-cve-announce/2026050618-CVE-2026-43092-883d@gregkh/T"], "threat_severity": "Low"}

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