smb: client: discard post-EOF pagecache when extending a file via clone range
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.
CVE-2026-98685
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-98685
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "c54fc3a4f375663f2361a9cbb2955fb4ef912879",
"lessThan": "15bb9f1d3e967e328649e92a1451e60a0dc66118",
"versionType": "git"
},
{
"status": "affected",
"version": "c54fc3a4f375663f2361a9cbb2955fb4ef912879",
"lessThan": "4721587f96cb8de8164f3fd203093a0875560999",
"versionType": "git"
},
{
"status": "affected",
"version": "358bd5f436d820bb758833050aae065b35d6986c",
"versionType": "git"
},
{
"status": "affected",
"version": "43801359c8971cc49b4a4db5015fba77fbd09c32",
"versionType": "git"
},
{
"status": "affected",
"version": "6.1.68",
"lessThan": "6.2",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.6.7",
"lessThan": "6.7",
"versionType": "semver"
}
],
"programFiles": [
"fs/smb/client/cifsfs.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.7"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.7",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "7.2.10",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"fs/smb/client/cifsfs.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-98685
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #38688 · Revision 1
- Added to Heist Feed
- Publisher date