CVE-2026-98686
In the Linux kernel, the following vulnerability has been resolved: smb: client: discard post-EOF pagecache when extending a file via zero
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Published: Oct 18, 2026 · Last modified: Oct 19, 2026
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In the Linux kernel, the following vulnerability has been resolved: smb: client: discard post-EOF pagecache when extending a file via zero range smb3_zero_range() removed the pagecache only for the range being zeroed, so when it 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. Lower the discard boundary to the smaller of the zero-range offset and the old EOF.
- git.kernel.orghttps://git.kernel.org/stable/c/6a8279c98ad289b27c0bdb11adb3f0c0b7fd456d
- git.kernel.orghttps://git.kernel.org/stable/c/94949b6b2f2bf0dba2e8786aed0b08cc6bc3a183
- git.kernel.orghttps://git.kernel.org/stable/c/b75dadb50a25eed525264bf6fea44fad94e7626f
- git.kernel.orghttps://git.kernel.org/stable/c/da4fe97fb6c730d9c94a115c7bfa6f98e0d578d0
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