CVE-2026-98685
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.
Affected versions
Linux kernel versions
6.1.68,
6.6.7,
6.7
and later are affected. Fixed in
7.2.10,
7.3
and their respective stable series.
References
2 totalFrequently asked questions
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What is CVE-2026-98685?
CVE-2026-98685 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.1.68 onward and has been patched in 7.2.10 and 7.3. CVE-2026-98685 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-98685?
Yes. CVE-2026-98685 has been patched. Fixed versions include 7.2.10 and 7.3. If you are running Linux kernel 6.1.68 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-98685 actively exploited?
No. CVE-2026-98685 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.