{"api_version":"1","generated_at":"2026-07-23T15:17:03+00:00","cve":"CVE-2026-31710","urls":{"html":"https://cve.report/CVE-2026-31710","api":"https://cve.report/api/cve/CVE-2026-31710.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-31710","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-31710"},"summary":{"title":"smb: client: fix dir separator in SMB1 UNIX mounts","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: fix dir separator in SMB1 UNIX mounts\n\nWhen calling cifs_mount_get_tcon() with SMB1 UNIX mounts,\n@cifs_sb->mnt_cifs_flags needs to be read or updated only after\ncalling reset_cifs_unix_caps(), otherwise it might end up with missing\nCIFS_MOUNT_POSIXACL and CIFS_MOUNT_POSIX_PATHS bits.\n\nThis fixes the wrong dir separator used in paths caused by the missing\nCIFS_MOUNT_POSIX_PATHS bit in cifs_sb_info::mnt_cifs_flags.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-05-01 14:16:21","updated_at":"2026-05-06 20:21:16"},"problem_types":["NVD-CWE-noinfo"],"metrics":[{"version":"3.1","source":"nvd@nist.gov","type":"Primary","score":"5.5","severity":"MEDIUM","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","data":{"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"}}],"references":[{"url":"https://git.kernel.org/stable/c/fbbfcf35e1ee3396631f3dc6214cb626aa9814c3","name":"https://git.kernel.org/stable/c/fbbfcf35e1ee3396631f3dc6214cb626aa9814c3","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/c4d3fc5844d685441befd0caaab648321013cdfd","name":"https://git.kernel.org/stable/c/c4d3fc5844d685441befd0caaab648321013cdfd","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":["Patch"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-31710","name":"CVE 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the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: fix dir separator in SMB1 UNIX mounts\n\nWhen calling cifs_mount_get_tcon() with SMB1 UNIX mounts,\n@cifs_sb->mnt_cifs_flags needs to be read or updated only after\ncalling reset_cifs_unix_caps(), otherwise it might end up with missing\nCIFS_MOUNT_POSIXACL and CIFS_MOUNT_POSIX_PATHS bits.\n\nThis fixes the wrong dir separator used in paths caused by the missing\nCIFS_MOUNT_POSIX_PATHS bit in cifs_sb_info::mnt_cifs_flags."}],"providerMetadata":{"dateUpdated":"2026-05-01T13:56:07.217Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/fbbfcf35e1ee3396631f3dc6214cb626aa9814c3"},{"url":"https://git.kernel.org/stable/c/c4d3fc5844d685441befd0caaab648321013cdfd"}],"title":"smb: client: fix dir separator in SMB1 UNIX mounts","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-31710","datePublished":"2026-05-01T13:56:07.217Z","dateReserved":"2026-03-09T15:48:24.133Z","dateUpdated":"2026-05-01T13:56:07.217Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-05-01 14:16:21","lastModifiedDate":"2026-05-06 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client: fix dir separator in SMB1 UNIX mounts","CVE":"CVE-2026-31710","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"31710","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nsmb: client: fix dir separator in SMB1 UNIX mounts\n\nWhen calling cifs_mount_get_tcon() with SMB1 UNIX mounts,\n@cifs_sb->mnt_cifs_flags needs to be read or updated only after\ncalling reset_cifs_unix_caps(), otherwise it might end up with missing\nCIFS_MOUNT_POSIXACL and CIFS_MOUNT_POSIX_PATHS bits.\n\nThis fixes the wrong dir separator used in paths caused by the missing\nCIFS_MOUNT_POSIX_PATHS bit in cifs_sb_info::mnt_cifs_flags.","Type":"Description","Title":"smb: client: fix dir separator in SMB1 UNIX mounts"}]}}}