{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-04-21T03:16:52.705","vulnerabilities":[{"cve":{"id":"CVE-2022-49296","sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","published":"2025-02-26T07:01:06.433","lastModified":"2025-10-01T20:16:02.430","vulnStatus":"Modified","cveTags":[],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nceph: fix possible deadlock when holding Fwb to get inline_data\n\n1, mount with wsync.\n2, create a file with O_RDWR, and the request was sent to mds.0:\n\n   ceph_atomic_open()-->\n     ceph_mdsc_do_request(openc)\n     finish_open(file, dentry, ceph_open)-->\n       ceph_open()-->\n         ceph_init_file()-->\n           ceph_init_file_info()-->\n             ceph_uninline_data()-->\n             {\n               ...\n               if (inline_version == 1 || /* initial version, no data */\n                   inline_version == CEPH_INLINE_NONE)\n                     goto out_unlock;\n               ...\n             }\n\nThe inline_version will be 1, which is the initial version for the\nnew create file. And here the ci->i_inline_version will keep with 1,\nit's buggy.\n\n3, buffer write to the file immediately:\n\n   ceph_write_iter()-->\n     ceph_get_caps(file, need=Fw, want=Fb, ...);\n     generic_perform_write()-->\n       a_ops->write_begin()-->\n         ceph_write_begin()-->\n           netfs_write_begin()-->\n             netfs_begin_read()-->\n               netfs_rreq_submit_slice()-->\n                 netfs_read_from_server()-->\n                   rreq->netfs_ops->issue_read()-->\n                     ceph_netfs_issue_read()-->\n                     {\n                       ...\n                       if (ci->i_inline_version != CEPH_INLINE_NONE &&\n                           ceph_netfs_issue_op_inline(subreq))\n                         return;\n                       ...\n                     }\n     ceph_put_cap_refs(ci, Fwb);\n\nThe ceph_netfs_issue_op_inline() will send a getattr(Fsr) request to\nmds.1.\n\n4, then the mds.1 will request the rd lock for CInode::filelock from\nthe auth mds.0, the mds.0 will do the CInode::filelock state transation\nfrom excl --> sync, but it need to revoke the Fxwb caps back from the\nclients.\n\nWhile the kernel client has aleady held the Fwb caps and waiting for\nthe getattr(Fsr).\n\nIt's deadlock!\n\nURL: https://tracker.ceph.com/issues/55377"},{"lang":"es","value":"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: ceph: se corrige un posible bloqueo al mantener presionado Fwb para obtener inline_data 1, montar con wsync. 2, crear un archivo con O_RDWR y la solicitud se envió a mds.0: ceph_atomic_open()--> ceph_mdsc_do_request(openc) finish_open(file, dentry, ceph_open)--> ceph_open()--> ceph_init_file()--> ceph_init_file_info()--> ceph_uninline_data()--> { ... if (inline_version == 1 || /* versión inicial, sin datos */ inline_version == CEPH_INLINE_NONE) goto out_unlock; ... } La inline_version será 1, que es la versión inicial para el nuevo archivo de creación. Y aquí, ci->i_inline_version se mantendrá con 1, es un error. 3, escribe en el búfer inmediatamente en el archivo: ceph_write_iter()--> ceph_get_caps(archivo, necesidad=Fw, deseo=Fb, ...); generic_perform_write()--> a_ops->write_begin()--> ceph_write_begin()--> netfs_write_begin()--> netfs_begin_read()--> netfs_rreq_submit_slice()--> netfs_read_from_server()--> rreq->netfs_ops->issue_read()--> ceph_netfs_issue_read()--> { ... if (ci->i_inline_version != CEPH_INLINE_NONE && ceph_netfs_issue_op_inline(subreq)) return; ... } ceph_put_cap_refs(ci, Fwb); El ceph_netfs_issue_op_inline() enviará una solicitud getattr(Fsr) a mds.1.4, luego mds.1 solicitará el bloqueo de rd para CInode::filelock desde el mds.0 de autenticación, el mds.0 realizará la transacción de estado de CInode::filelock desde excl --> sync, pero necesita revocar las capacidades Fxwb de los clientes. Mientras que el cliente del kernel ya ha retenido las capacidades Fwb y está esperando el getattr(Fsr). ¡Está en un punto muerto! URL: https://tracker.ceph.com/issues/55377"}],"metrics":{"cvssMetricV31":[{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","baseScore":5.5,"baseSeverity":"MEDIUM","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":3.6},{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","baseScore":5.5,"baseSeverity":"MEDIUM","attackVector":"LOCAL","attackComplexity":"LOW","privilegesRequired":"LOW","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH"},"exploitabilityScore":1.8,"impactScore":3.6}]},"weaknesses":[{"source":"nvd@nist.gov","type":"Primary","description":[{"lang":"en","value":"CWE-667"}]},{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","type":"Secondary","description":[{"lang":"en","value":"CWE-667"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.34","versionEndExcluding":"5.18.4","matchCriteriaId":"48912B8B-BDF1-422C-9CA5-2DDFDBAADC80"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/292b7a7275ce535a1abfa4dd0b2e586162aaae1e","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/825978fd6a0defc3c29d8a38b6cea76a0938d21e","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]}]}}]}