CVE-2026-98170 in Linux
요약
\~에 의해 MITRE • 2026. 10. 06.
In the Linux kernel, the following vulnerability has been resolved:
smb: client: fix OOB struct field reads in move_smb2_ea_to_cifs()
In move_smb2_ea_to_cifs(), the while (src_size > 0) loop condition is insufficient. It allows iteration to continue even if the remaining src_size is too small to contain a complete smb2_ea_info structure. Consequently, reads of ea_name_length and ea_value_length can occur out-of-bounds.
Fix this by ensuring src_size >= sizeof(*src) before attempting to read any structure fields. Additionally, reject any next_entry_offset that is smaller than sizeof(*src) or that would advance the pointer beyond the available buffer.
Note that for calls where the server returns a malformed EA list, the error returned to userspace changes from -ENODATA (getxattr) or -ERANGE (listxattr) to -EIO. This correctly signals a server protocol error rather than misleadingly indicating "attribute not present" or "output buffer too small".
VulDB is the best source for vulnerability data and more expert information about this specific topic.