smb: client: fix reparse buffer bounds in cifs_query_reparse_point()
In the Linux kernel, the following vulnerability has been resolved: smb: client: fix reparse buffer bounds in cifs_query_reparse_point() In cifs_query_reparse_point(), the start >= end check before casting to struct reparse_data_buffer * only ensures the start pointer is within the response. It fails to verify that there is enough space remaining for the fixed 8-byte header of the structure. If a server provides a DataOffset that leaves less than 8 bytes remaining, the check passes, but subsequent reads of ReparseTag and ReparseDataLength will occur out-of-bounds. Fix this by ensuring the remaining space is at least the size of the reparse_data_buffer structure before accessing its fields.
CVE-2026-98168
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-2026-98168
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": "848d78e3625f15de09d34a562dc49a98b78a62f3",
"lessThan": "aa00eead258e4fe8158a3a3e2d65facf06274abd",
"versionType": "git"
},
{
"status": "affected",
"version": "48ca7139ab7f0bbed95ff7a901ea497017769657",
"lessThan": "3d67f155fe5813cfb02a551a9a12d6ea06a902e9",
"versionType": "git"
},
{
"status": "affected",
"version": "56e84c64fc257a95728ee73165456b025c48d408",
"lessThan": "d1152c96a3002e3df6b9a5b007cecaa7b19b4f79",
"versionType": "git"
},
{
"status": "affected",
"version": "56e84c64fc257a95728ee73165456b025c48d408",
"lessThan": "8dc5db3a0e583ea8d31d0613cefd99e93e095c3c",
"versionType": "git"
},
{
"status": "affected",
"version": "56e84c64fc257a95728ee73165456b025c48d408",
"lessThan": "5f0306e731e2f46e91419eae57eee3a241c055e0",
"versionType": "git"
},
{
"status": "affected",
"version": "c13b779d26b3702fba8f7d5fe757aba5bda85fd0",
"versionType": "git"
},
{
"status": "affected",
"version": "6.6.94",
"lessThan": "6.6.160",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.12.34",
"lessThan": "6.12.112",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.15.3",
"lessThan": "6.16",
"versionType": "semver"
}
],
"programFiles": [
"fs/smb/client/cifssmb.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.16"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.16",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"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/cifssmb.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-98168
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #48866 · Revision 1
- Added to Heist Feed
- Publisher date