Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: smb: client: fix use-before-check of ReparseDataLength in reparse_buf_ptr() reparse_buf_ptr() reads buf->ReparseDataLength before checking that count covers the full fixed header: buf = (struct reparse_data_buffer *)((u8 *)io + off); len = sizeof(*buf); /* 8 bytes */ rdlen = le16_to_cpu(buf->ReparseDataLength); /* offset 4, 2 bytes */ if (count < len || count < rdlen + len) /* check comes after */ struct reparse_data_buffer has ReparseDataLength at offset 4. If a server returns OutputCount < 6, the read at offset 4-5 reaches past the end of the received data. The off+count bounds against iov_len were already validated, but that does not protect against count being smaller than sizeof(*buf). Split the check: verify count >= sizeof(*buf) before reading ReparseDataLength, then verify count covers the data region.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected a158bb66b1373866d9fd5997565a58a573085539 before b70bc592afd19732e2e4563300ebe8f974280365; affected 67ec9949b0dfe78c99e110dd975eb7dc5645630c before 711cf71300d7992f450600df8864917d3538679f; affected 67ec9949b0dfe78c99e110dd975eb7dc5645630c before 05f78e6cf34ea3a285053bd5999e08e8ac298bd5; affected 6.6.32 before 6.6.160 |
| Linux / Linux | affected 6.8; unaffected 0 before 6.8; unaffected 6.6.160 through 6.6.*; unaffected 7.2.4 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/b70bc592afd19732e2e4563300ebe8f974280365
- https://git.kernel.org/stable/c/711cf71300d7992f450600df8864917d3538679f
- https://git.kernel.org/stable/c/05f78e6cf34ea3a285053bd5999e08e8ac298bd5
ADP enrichment
No English description supplied.
No references supplied.