CVE-2026-68343: smb: client: validate DFS referral PathConsumed
In the Linux kernel, the following vulnerability has been resolved:
smb: client: validate DFS referral PathConsumed
parsedfsreferrals() 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.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 6.6.150.1-1
Event History
Frequently Asked Questions
What is the severity of CVE-2026-68343?
CVE-2026-68343 has a risk rating of 37.
How do I fix CVE-2026-68343?
To resolve CVE-2026-68343, update to the latest patched version of the Linux kernel.
What kind of vulnerability is CVE-2026-68343?
CVE-2026-68343 is a vulnerability that affects the SMB client in the Linux kernel.
Which Linux kernel versions are affected by CVE-2026-68343?
CVE-2026-68343 impacts various versions of the Linux kernel that utilize the SMB client functionality.
Is CVE-2026-68343 a remote vulnerability?
Yes, CVE-2026-68343 can potentially be exploited remotely through SMB client interactions.