CVE-2026-68343

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux4ecce920e13ace16a5ba45efe8909946c28fb2ad < 5b439f39f33ec15d319ced3b025e122346fba987affected
LinuxLinux4ecce920e13ace16a5ba45efe8909946c28fb2ad < 285bd4a5f3f156aa5869843b47a1b1380b774241affected
LinuxLinux4ecce920e13ace16a5ba45efe8909946c28fb2ad < 2fdd6d196c656b376cc251e1e9ff110b3ed522e1affected
LinuxLinux4ecce920e13ace16a5ba45efe8909946c28fb2ad < 9f88a99ed511651b2dc2177d6854b2d1b8322e75affected
LinuxLinux4ecce920e13ace16a5ba45efe8909946c28fb2ad < f6f5ee2aa33b350c671721b965251c42cebb962eaffected
LinuxLinux4.11affected
LinuxLinux0 < 4.11unaffected
LinuxLinux6.6.148 <= 6.6.*unaffected
LinuxLinux6.12.101 <= 6.12.*unaffected
LinuxLinux6.18.42 <= 6.18.*unaffected
LinuxLinux7.1.6 <= 7.1.*unaffected
LinuxLinux7.2-rc5 <= *unaffected

Weaknesses

References