CVE-2021-47558

{"id": "CVE-2021-47558", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 1.8}]}, "published": "2024-05-24T15:15:20.467", "references": [{"url": "https://git.kernel.org/stable/c/a92f0eebb8dc008b9e8c51c6f7b8c93b27a29a43", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/b270bfe697367776eca2e6759a71d700fb8d82a2", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/a92f0eebb8dc008b9e8c51c6f7b8c93b27a29a43", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}, {"url": "https://git.kernel.org/stable/c/b270bfe697367776eca2e6759a71d700fb8d82a2", "tags": ["Patch"], "source": "af854a3a-2127-422b-91ae-364da2661108"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: stmmac: Disable Tx queues when reconfiguring the interface\n\nThe Tx queues were not disabled in situations where the driver needed to\nstop the interface to apply a new configuration. This could result in a\nkernel panic when doing any of the 3 following actions:\n* reconfiguring the number of queues (ethtool -L)\n* reconfiguring the size of the ring buffers (ethtool -G)\n* installing/removing an XDP program (ip l set dev ethX xdp)\n\nPrevent the panic by making sure netif_tx_disable is called when stopping\nan interface.\n\nWithout this patch, the following kernel panic can be observed when doing\nany of the actions above:\n\nUnable to handle kernel paging request at virtual address ffff80001238d040\n[....]\n Call trace:\n dwmac4_set_addr+0x8/0x10\n dev_hard_start_xmit+0xe4/0x1ac\n sch_direct_xmit+0xe8/0x39c\n __dev_queue_xmit+0x3ec/0xaf0\n dev_queue_xmit+0x14/0x20\n[...]\n[ end trace 0000000000000002 ]---"}, {"lang": "es", "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: net: stmmac: Deshabilitar las colas de Tx al reconfigurar la interfaz Las colas de Tx no se deshabilitaron en situaciones en las que el controlador necesitaba detener la interfaz para aplicar una nueva configuraci\u00f3n. Esto podr\u00eda provocar un p\u00e1nico en el kernel al realizar cualquiera de las 3 acciones siguientes: * reconfigurar el n\u00famero de colas (ethtool -L) * reconfigurar el tama\u00f1o de los b\u00faferes circulares (ethtool -G) * instalar/eliminar un programa XDP (ip l set dev ethX xdp) Evite el p\u00e1nico asegur\u00e1ndose de que se llame a netif_tx_disable al detener una interfaz. Sin este parche, se puede observar el siguiente p\u00e1nico del kernel al realizar cualquiera de las acciones anteriores: No se puede manejar la solicitud de paginaci\u00f3n del kernel en la direcci\u00f3n virtual ffff80001238d040 [....] Seguimiento de llamadas: dwmac4_set_addr+0x8/0x10 dev_hard_start_xmit+0xe4/0x1ac sch_direct_xmit+ 0xe8/0x39c __dev_queue_xmit+0x3ec/0xaf0 dev_queue_xmit+0x14/0x20 [...] [fin de seguimiento 0000000000000002]---"}], "lastModified": "2025-09-18T15:37:52.970", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "393871B9-F66E-47B3-BF15-59E6B2AE6313", "versionEndExcluding": "5.15.6", "versionStartIncluding": "5.10"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.16:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "357AA433-37E8-4323-BFB2-3038D6E4B414"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:5.16:rc2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "A73429BA-C2D9-4D0C-A75F-06A1CA8B3983"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}