Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: cifs: fix loff_t underflow in cifs_remap_file_range() when len == 0 With len == 0 (clone to EOF), the effective length is computed as: len = src_inode->i_size - off; If off > i_size, this is a negative loff_t, corrupting the ByteCount in the FSCTL_DUPLICATE_EXTENTS_TO_FILE request and inverting the range in filemap_write_and_wait_range(). The existing off >= i_size check fires only after the ioctl has already been sent. Snapshot i_size_read() once for both the bounds check and the length calculation, eliminating the TOCTOU and 32-bit torn-read risk. Reject off > src_size with -EINVAL. Treat off == src_size as a no-op, consistent with __generic_remap_file_range_prep().
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 04b38d601239b4d9be641b412cf4b7456a041c67 before f3d1ae1e6bc4a9f559185b6e7bd2b6375ec2fdd4; affected 04b38d601239b4d9be641b412cf4b7456a041c67 before 7f62817fe049b0f3652518c1ba72631ec1e0a322; affected 04b38d601239b4d9be641b412cf4b7456a041c67 before b098f5e5858797827666e6cd73033f52fc39b5f6; affected 04b38d601239b4d9be641b412cf4b7456a041c67 before c2a0dcb5a7a1516aa6eb6d5cedca6a8e76527028; affected 04b38d601239b4d9be641b412cf4b7456a041c67 before b057ca17b656345d04669cb87f2aff9b31d873db; affected 04b38d601239b4d9be641b412cf4b7456a041c67 before 6c322f5cf7476ded7a9a20f7be72462065a03c68 |
| Linux / Linux | affected 4.5; unaffected 0 before 4.5; unaffected 6.1.188 through 6.1.*; unaffected 6.6.157 through 6.6.*; unaffected 6.12.109 through 6.12.*; unaffected 6.18.50 through 6.18.*; unaffected 7.2.4 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/f3d1ae1e6bc4a9f559185b6e7bd2b6375ec2fdd4
- https://git.kernel.org/stable/c/7f62817fe049b0f3652518c1ba72631ec1e0a322
- https://git.kernel.org/stable/c/b098f5e5858797827666e6cd73033f52fc39b5f6
- https://git.kernel.org/stable/c/c2a0dcb5a7a1516aa6eb6d5cedca6a8e76527028
- https://git.kernel.org/stable/c/b057ca17b656345d04669cb87f2aff9b31d873db
- https://git.kernel.org/stable/c/6c322f5cf7476ded7a9a20f7be72462065a03c68
ADP enrichment
No English description supplied.
No references supplied.