smb: client: discard post-EOF pagecache when extending a file via clone range

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-98685
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-18 16:17:21 UTC
Updated2026-10-19 10:19:32 UTC
DescriptionIn 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.

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected c54fc3a4f375663f2361a9cbb2955fb4ef912879 15bb9f1d3e967e328649e92a1451e60a0dc66118 git Not specified
CNA Linux Linux affected c54fc3a4f375663f2361a9cbb2955fb4ef912879 4721587f96cb8de8164f3fd203093a0875560999 git Not specified
CNA Linux Linux affected 358bd5f436d820bb758833050aae065b35d6986c git Not specified
CNA Linux Linux affected 43801359c8971cc49b4a4db5015fba77fbd09c32 git Not specified
CNA Linux Linux affected 6.1.68 6.2 semver Not specified
CNA Linux Linux affected 6.6.7 6.7 semver Not specified
CNA Linux Linux affected 6.7 Not specified
CNA Linux Linux unaffected 6.7 semver Not specified
CNA Linux Linux unaffected 7.2.10 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/4721587f96cb8de8164f3fd203093a0875560999 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/15bb9f1d3e967e328649e92a1451e60a0dc66118 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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