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CVE-2026-31710

smb: client: fix dir separator in SMB1 UNIX mounts

cve-program · severity unknownCVSS unknownCheck source for fixed versionsKEV status unknown
Original advisory

cve-program · CVE-2026-31710

Published

In the Linux kernel, the following vulnerability has been resolved: smb: client: fix dir separator in SMB1 UNIX mounts When calling cifs_mount_get_tcon() with SMB1 UNIX mounts, @cifs_sb->mnt_cifs_flags needs to be read or updated only after calling reset_cifs_unix_caps(), otherwise it might end up with missing CIFS_MOUNT_POSIXACL and CIFS_MOUNT_POSIX_PATHS bits. This fixes the wrong dir separator used in paths caused by the missing CIFS_MOUNT_POSIX_PATHS bit in cifs_sb_info::mnt_cifs_flags.

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Affected versions, risk and source history

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Sources read 13 Nov 13:11 UTC · 274 of 275 readable · 273 fully read · documentation 469/469 current

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