CVE-2025-21751

{"id": "CVE-2025-21751", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.8}]}, "published": "2025-02-27T03:15:15.760", "references": [{"url": "https://git.kernel.org/stable/c/1ce840c7a659aa53a31ef49f0271b4fd0dc10296", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/23a86c76a1a197e8fbbbd0ce3e826eb58c471624", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/5682aad0276ff9b9b0eff3188eb6a1f504d6b436", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "description": [{"lang": "en", "value": "CWE-416"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/mlx5: HWS, change error flow on matcher disconnect\n\nCurrently, when firmware failure occurs during matcher disconnect flow,\nthe error flow of the function reconnects the matcher back and returns\nan error, which continues running the calling function and eventually\nfrees the matcher that is being disconnected.\nThis leads to a case where we have a freed matcher on the matchers list,\nwhich in turn leads to use-after-free and eventual crash.\n\nThis patch fixes that by not trying to reconnect the matcher back when\nsome FW command fails during disconnect.\n\nNote that we're dealing here with FW error. We can't overcome this\nproblem. This might lead to bad steering state (e.g. wrong connection\nbetween matchers), and will also lead to resource leakage, as it is\nthe case with any other error handling during resource destruction.\n\nHowever, the goal here is to allow the driver to continue and not crash\nthe machine with use-after-free error."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net/mlx5: HWS, cambiar el flujo de error en la desconexi\u00f3n del comparador Actualmente, cuando ocurre una falla de firmware durante el flujo de desconexi\u00f3n del comparador, el flujo de error de la funci\u00f3n vuelve a conectar el comparador y devuelve un error, que contin\u00faa ejecutando la funci\u00f3n de llamada y finalmente libera el comparador que se est\u00e1 desconectando. Esto lleva a un caso en el que tenemos un comparador liberado en la lista de comparadores, lo que a su vez lleva a un use after free y un eventual bloqueo. Este parche lo corrige al no intentar volver a conectar el comparador cuando alg\u00fan comando de FW falla durante la desconexi\u00f3n. Tenga en cuenta que aqu\u00ed estamos tratando con un error de FW. No podemos superar este problema. Esto puede llevar a un mal estado de direcci\u00f3n (por ejemplo, conexi\u00f3n incorrecta entre comparadores) y tambi\u00e9n conducir\u00e1 a una fuga de recursos, como es el caso con cualquier otro manejo de errores durante la destrucci\u00f3n de recursos. Sin embargo, el objetivo aqu\u00ed es permitir que el controlador contin\u00fae y no bloquee la m\u00e1quina con un error de use after free."}], "lastModified": "2025-09-19T15:15:48.233", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "BE4E9494-C003-4567-B9CB-CF0C8429C517", "versionEndExcluding": "6.13.3"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}