CVE-2026-98685
Description
In the Linux kernel, the following vulnerability has been resolved: smb: client: discard post-EOF pagecache when extending a file via clone range cifs_remap_file_range() discarded the pagecache only for the folios overlapping the destination region, so when a clone extends the file the folio straddling the old EOF - which may hold data dirtied past EOF through an mmap - was never dropped and became visible as file content once the file was extended. Start the discard at the smaller of fstart and the old EOF. i_size is still old here, so nothing past the old EOF is flushed to the server.
How to fix
- Linux Linux15bb9f1d3e967e328649e92a1451e60a0dc66118, 4721587f96cb8de8164f3fd203093a0875560999, 6.2, 6.7 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | c54fc3a4f375663f2361a9cbb2955fb4ef912879 ≤ v < 15bb9f1d3e967e328649e92a1451e60a0dc66118, c54fc3a4f375663f2361a9cbb2955fb4ef912879 ≤ v < 4721587f96cb8de8164f3fd203093a0875560999, 358bd5f436d820bb758833050aae065b35d6986c, 43801359c8971cc49b4a4db5015fba77fbd09c32, 6.1.68 ≤ v < 6.2, 6.6.7 ≤ v < 6.7, 6.7 | 15bb9f1d3e967e328649e92a1451e60a0dc66118, 4721587f96cb8de8164f3fd203093a0875560999, 6.2, 6.7 |
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