smb: client: validate DFS referral PathConsumed
In the Linux kernel, the following vulnerability has been resolved: smb: client: validate DFS referral PathConsumed parse_dfs_referrals() validates that the response contains the fixed referral entry array and, on for-next, the per-referral string offsets. However, the response also contains a PathConsumed value that is later used for DFS path parsing. If a malformed response provides a PathConsumed value larger than the search name, later DFS parsing can advance beyond the end of the path. Validate PathConsumed against the search name length before storing it in the parsed referral.
CVE-2026-68343
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-2026-68343
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": "4ecce920e13ace16a5ba45efe8909946c28fb2ad",
"lessThan": "bfebe5110fd135d86d65a0a346e14c106b02028b",
"versionType": "git"
},
{
"status": "affected",
"version": "4ecce920e13ace16a5ba45efe8909946c28fb2ad",
"lessThan": "5b439f39f33ec15d319ced3b025e122346fba987",
"versionType": "git"
},
{
"status": "affected",
"version": "4ecce920e13ace16a5ba45efe8909946c28fb2ad",
"lessThan": "285bd4a5f3f156aa5869843b47a1b1380b774241",
"versionType": "git"
},
{
"status": "affected",
"version": "4ecce920e13ace16a5ba45efe8909946c28fb2ad",
"lessThan": "2fdd6d196c656b376cc251e1e9ff110b3ed522e1",
"versionType": "git"
},
{
"status": "affected",
"version": "4ecce920e13ace16a5ba45efe8909946c28fb2ad",
"lessThan": "9f88a99ed511651b2dc2177d6854b2d1b8322e75",
"versionType": "git"
},
{
"status": "affected",
"version": "4ecce920e13ace16a5ba45efe8909946c28fb2ad",
"lessThan": "f6f5ee2aa33b350c671721b965251c42cebb962e",
"versionType": "git"
}
],
"programFiles": [
"fs/smb/client/misc.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.11"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.11",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.1.183",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.148",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.101",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.42",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.6",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"fs/smb/client/misc.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-68343
Source reference:
/cveMetadata/cveId
Publisher severity
critical
Source reference: /containers/cna/metrics
- Event
- #41700 · Revision 1
- Added to Heist Feed
- Publisher date