CVE-2026-68343

smb: client: validate DFS referral PathConsumed

State: Published
Severity: 9.1 Critical
Published: Aug 10, 2026
Updated: Oct 19, 2026
Reserved: Jul 30, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	9.1 Critical	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H	Linux

Weaknesses

CWE-125 Out-of-bounds Read

Affected Products

Product	Versions
LinuxLinux	4ecce920e13ace16a5ba45efe8909946c28fb2ad to before bfebe5110fd135d86d65a0a346e14c106b02028bAffected 4ecce920e13ace16a5ba45efe8909946c28fb2ad to before 5b439f39f33ec15d319ced3b025e122346fba987Affected 4ecce920e13ace16a5ba45efe8909946c28fb2ad to before 285bd4a5f3f156aa5869843b47a1b1380b774241Affected 4ecce920e13ace16a5ba45efe8909946c28fb2ad to before 2fdd6d196c656b376cc251e1e9ff110b3ed522e1Affected 4ecce920e13ace16a5ba45efe8909946c28fb2ad to before 9f88a99ed511651b2dc2177d6854b2d1b8322e75Affected 4ecce920e13ace16a5ba45efe8909946c28fb2ad to before f6f5ee2aa33b350c671721b965251c42cebb962eAffected
LinuxLinux	4.11Affected before 4.11Not affected 6.1.183 through 6.1.Not affected 6.6.148 through 6.6.Not affected 6.12.101 through 6.12.Not affected 6.18.42 through 6.18.Not affected 7.1.6 through 7.1.*Not affected 7.2 and laterNot affected

Product

Versions

LinuxLinux

4ecce920e13ace16a5ba45efe8909946c28fb2ad to before bfebe5110fd135d86d65a0a346e14c106b02028bAffected
4ecce920e13ace16a5ba45efe8909946c28fb2ad to before 5b439f39f33ec15d319ced3b025e122346fba987Affected
4ecce920e13ace16a5ba45efe8909946c28fb2ad to before 285bd4a5f3f156aa5869843b47a1b1380b774241Affected
4ecce920e13ace16a5ba45efe8909946c28fb2ad to before 2fdd6d196c656b376cc251e1e9ff110b3ed522e1Affected
4ecce920e13ace16a5ba45efe8909946c28fb2ad to before 9f88a99ed511651b2dc2177d6854b2d1b8322e75Affected
4ecce920e13ace16a5ba45efe8909946c28fb2ad to before f6f5ee2aa33b350c671721b965251c42cebb962eAffected

LinuxLinux

4.11Affected
before 4.11Not affected
6.1.183 through 6.1.*Not affected
6.6.148 through 6.6.*Not affected
6.12.101 through 6.12.*Not affected
6.18.42 through 6.18.*Not affected
7.1.6 through 7.1.*Not affected
7.2 and laterNot affected

References

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