cve-2021-46952
Vulnerability from cvelistv5
Published
2024-02-27 18:40
Modified
2024-11-04 11:56
Severity ?
EPSS score ?
Summary
NFS: fs_context: validate UDP retrans to prevent shift out-of-bounds
References
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This is caused\nby a garbage timeout (retrans) mount option being passed to nfs mount,\nin this case from syzkaller.\n\nIf the protocol is XPRT_TRANSPORT_UDP, then \u0027retrans\u0027 is a shift\nvalue for a 64-bit long integer, so \u0027retrans\u0027 cannot be \u003e= 64.\nIf it is \u003e= 64, fail the mount and return an error." } ], "providerMetadata": { "dateUpdated": "2024-11-04T11:56:32.243Z", "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux" }, "references": [ { "url": "https://git.kernel.org/stable/c/96fa26b74cdcf9f5c98996bf36bec9fb5b19ffe2" }, { "url": "https://git.kernel.org/stable/c/2f3380121d49e829fb73ba86240c181bc32ad897" }, { "url": "https://git.kernel.org/stable/c/3d0163821c035040a46d816a42c0780f0f0a30a8" }, { "url": "https://git.kernel.org/stable/c/c09f11ef35955785f92369e25819bf0629df2e59" } ], "title": "NFS: fs_context: validate UDP retrans to prevent shift out-of-bounds", "x_generator": { "engine": "bippy-9e1c9544281a" } } }, "cveMetadata": { "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "assignerShortName": "Linux", "cveId": "CVE-2021-46952", "datePublished": "2024-02-27T18:40:35.343Z", "dateReserved": "2024-02-25T13:45:52.722Z", "dateUpdated": "2024-11-04T11:56:32.243Z", "state": "PUBLISHED" }, "dataType": "CVE_RECORD", "dataVersion": "5.1", "meta": { "nvd": "{\"cve\":{\"id\":\"CVE-2021-46952\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-02-27T19:04:06.517\",\"lastModified\":\"2024-04-10T20:15:42.153\",\"vulnStatus\":\"Analyzed\",\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nNFS: fs_context: validate UDP retrans to prevent shift out-of-bounds\\n\\nFix shift out-of-bounds in xprt_calc_majortimeo(). This is caused\\nby a garbage timeout (retrans) mount option being passed to nfs mount,\\nin this case from syzkaller.\\n\\nIf the protocol is XPRT_TRANSPORT_UDP, then \u0027retrans\u0027 is a shift\\nvalue for a 64-bit long integer, so \u0027retrans\u0027 cannot be \u003e= 64.\\nIf it is \u003e= 64, fail the mount and return an error.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: NFS: fs_context: valida las retransmisiones UDP para evitar cambios fuera de los l\u00edmites. Corrige cambios fuera de los l\u00edmites en xprt_calc_majortimeo(). Esto se debe a que se pasa una opci\u00f3n de montaje de tiempo de espera de basura (retransmisi\u00f3n) al montaje nfs, en este caso desde syzkaller. Si el protocolo es XPRT_TRANSPORT_UDP, entonces \u0027retrans\u0027 es un valor de desplazamiento para un entero largo de 64 bits, por lo que \u0027retrans\u0027 no puede ser \u0026gt;= 64. 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- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.