{"resultsPerPage":1,"startIndex":0,"totalResults":1,"format":"NVD_CVE","version":"2.0","timestamp":"2026-06-05T01:47:07.468","vulnerabilities":[{"cve":{"id":"CVE-2026-23189","sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","published":"2026-02-14T17:15:56.703","lastModified":"2026-03-18T17:18:58.633","vulnStatus":"Analyzed","cveTags":[],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nceph: fix NULL pointer dereference in ceph_mds_auth_match()\n\nThe CephFS kernel client has regression starting from 6.18-rc1.\nWe have issue in ceph_mds_auth_match() if fs_name == NULL:\n\n    const char fs_name = mdsc->fsc->mount_options->mds_namespace;\n    ...\n    if (auth->match.fs_name && strcmp(auth->match.fs_name, fs_name)) {\n            / fsname mismatch, try next one */\n            return 0;\n    }\n\nPatrick Donnelly suggested that: In summary, we should definitely start\ndecoding `fs_name` from the MDSMap and do strict authorizations checks\nagainst it. Note that the `-o mds_namespace=foo` should only be used for\nselecting the file system to mount and nothing else. It's possible\nno mds_namespace is specified but the kernel will mount the only\nfile system that exists which may have name \"foo\".\n\nThis patch reworks ceph_mdsmap_decode() and namespace_equals() with\nthe goal of supporting the suggested concept. Now struct ceph_mdsmap\ncontains m_fs_name field that receives copy of extracted FS name\nby ceph_extract_encoded_string(). For the case of \"old\" CephFS file\nsystems, it is used \"cephfs\" name.\n\n[ idryomov: replace redundant %*pE with %s in ceph_mdsmap_decode(),\n  get rid of a series of strlen() calls in ceph_namespace_match(),\n  drop changes to namespace_equals() body to avoid treating empty\n  mds_namespace as equal, drop changes to ceph_mdsc_handle_fsmap()\n  as namespace_equals() isn't an equivalent substitution there ]"},{"lang":"es","value":"En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nceph: soluciona la desreferencia de puntero NULL en ceph_mds_auth_match()\n\nEl cliente del kernel de CephFS tiene una regresión a partir de 6.18-rc1.\nTenemos un problema en ceph_mds_auth_match() si fs_name == NULL:\n\n    const char fs_name = mdsc->fsc->mount_options->mds_namespace;\n    ...\n    if (auth->match.fs_name && strcmp(auth->match.fs_name, fs_name)) {\n            / el nombre de sistema de archivos no coincide, intentar el siguiente */\n            return 0;\n    }\n\nPatrick Donnelly sugirió que: En resumen, definitivamente deberíamos empezar a decodificar 'fs_name' del MDSMap y realizar controles de autorización estrictos contra él. Tenga en cuenta que '-o mds_namespace=foo' solo debe usarse para seleccionar el sistema de archivos a montar y nada más. Es posible que no se especifique ningún mds_namespace, pero el kernel montará el único sistema de archivos que existe, el cual puede tener el nombre 'foo'.\n\nEste parche reelabora ceph_mdsmap_decode() y namespace_equals() con el objetivo de apoyar el concepto sugerido. Ahora la estructura ceph_mdsmap contiene el campo m_fs_name que recibe una copia del nombre de FS extraído por ceph_extract_encoded_string(). Para el caso de sistemas de archivos CephFS 'antiguos', se utiliza el nombre 'cephfs'.\n\n[ idryomov: reemplazar el redundante %*pE con %s en ceph_mdsmap_decode(), eliminar una serie de llamadas a strlen() en ceph_namespace_match(), descartar cambios en el cuerpo de namespace_equals() para evitar tratar un mds_namespace vacío como igual, descartar cambios en ceph_mdsc_handle_fsmap() ya que namespace_equals() no es una sustitución equivalente allí ]"}],"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}]},"weaknesses":[{"source":"nvd@nist.gov","type":"Primary","description":[{"lang":"en","value":"CWE-476"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.12.58","versionEndExcluding":"6.12.70","matchCriteriaId":"ACE64C6D-2601-447E-8A2B-0D932A7C5C60"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.17.8","versionEndExcluding":"6.18.10","matchCriteriaId":"6B6161FA-39A8-4DBD-9D3F-130200A2D241"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:6.19:rc1:*:*:*:*:*:*","matchCriteriaId":"17B67AA7-40D6-4AFA-8459-F200F3D7CFD1"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:6.19:rc2:*:*:*:*:*:*","matchCriteriaId":"C47E4CC9-C826-4FA9-B014-7FE3D9B318B2"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:6.19:rc3:*:*:*:*:*:*","matchCriteriaId":"F71D92C0-C023-48BD-B3B6-70B638EEE298"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:6.19:rc4:*:*:*:*:*:*","matchCriteriaId":"13580667-0A98-40CC-B29F-D12790B91BDB"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:6.19:rc5:*:*:*:*:*:*","matchCriteriaId":"CAD1FED7-CF48-47BF-AC7D-7B6FA3C065FC"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:6.19:rc6:*:*:*:*:*:*","matchCriteriaId":"3EF854A1-ABB1-4E93-BE9A-44569EC76C0D"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:6.19:rc7:*:*:*:*:*:*","matchCriteriaId":"F5DC0CA6-F0AF-4DDF-A882-3DADB9A886A7"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:6.19:rc8:*:*:*:*:*:*","matchCriteriaId":"EB5B7DFC-C36B-45D8-922C-877569FDDF43"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/57b36ffc8881dd455d875f85c105901974af2130","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/7987cce375ac8ce98e170a77aa2399f2cf6eb99f","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]},{"url":"https://git.kernel.org/stable/c/c6f8326f26bd20d648d9a55afd68148d1b6afe28","source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"]}]}}]}