smb: client: fix missing iov bounds check in parse_posix_sids()
In the Linux kernel, the following vulnerability has been resolved: smb: client: fix missing iov bounds check in parse_posix_sids() In parse_posix_sids(), sidsbuf_end is calculated using the server-supplied out_len without being validated against the actual length of the received iov (iov_len). If a server provides an inflated out_len, sidsbuf_end will point past the end of the iov. This defeats the bounds guards in posix_info_sid_size(), allowing out-of-bounds reads into adjacent kernel memory. Fix this by rejecting responses where the calculated sidsbuf_end would exceed the received iov boundaries or cause pointer wraparound.
CVE-2026-98405
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-2026-98405
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": "a90f37e3d7acfd9824f162830583bbf7846fe252",
"lessThan": "d91b9a3b2b38e5ac1b51e9e5b23fe53ad7b49644",
"versionType": "git"
},
{
"status": "affected",
"version": "858e74876c5cbff1dfd5bace99e32fbce2abd4b5",
"lessThan": "b862996e5105be1293da9cdc85da77b76021c3bd",
"versionType": "git"
},
{
"status": "affected",
"version": "858e74876c5cbff1dfd5bace99e32fbce2abd4b5",
"lessThan": "2f8ed71aaaba3bc8b19cd9930cc62e63e142b299",
"versionType": "git"
},
{
"status": "affected",
"version": "858e74876c5cbff1dfd5bace99e32fbce2abd4b5",
"lessThan": "eac6917a42899aad0617bbf04798c5dd946a1fe5",
"versionType": "git"
},
{
"status": "affected",
"version": "858e74876c5cbff1dfd5bace99e32fbce2abd4b5",
"lessThan": "b09d092eb24ad0110f16a9b7c1ed5d2a0c1733dc",
"versionType": "git"
},
{
"status": "affected",
"version": "6.6.32",
"lessThan": "6.6.158",
"versionType": "semver"
}
],
"programFiles": [
"fs/smb/client/smb2inode.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.8"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.8",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.158",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.112",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.54",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.8",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"fs/smb/client/smb2inode.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-98405
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #55618 · Revision 1
- Added to Heist Feed
- Publisher date