CVE-2026-68343 PUBLISHED

smb: client: validate DFS referral PathConsumed

Assigner: Linux
Reserved: 30.07.2026 Published: 10.08.2026 Updated: 10.08.2026

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.

Product Status

Vendor Linux
Product Linux
Versions Default: unaffected
  • affected from 4ecce920e13ace16a5ba45efe8909946c28fb2ad to 5b439f39f33ec15d319ced3b025e122346fba987 (excl.)
  • affected from 4ecce920e13ace16a5ba45efe8909946c28fb2ad to 285bd4a5f3f156aa5869843b47a1b1380b774241 (excl.)
  • affected from 4ecce920e13ace16a5ba45efe8909946c28fb2ad to 2fdd6d196c656b376cc251e1e9ff110b3ed522e1 (excl.)
  • affected from 4ecce920e13ace16a5ba45efe8909946c28fb2ad to 9f88a99ed511651b2dc2177d6854b2d1b8322e75 (excl.)
  • affected from 4ecce920e13ace16a5ba45efe8909946c28fb2ad to f6f5ee2aa33b350c671721b965251c42cebb962e (excl.)
Vendor Linux
Product Linux
Versions Default: affected
  • Version 4.11 is affected
  • unaffected from 0 to 4.11 (excl.)
  • unaffected from 6.6.148 to 6.6.* (incl.)
  • unaffected from 6.12.101 to 6.12.* (incl.)
  • unaffected from 6.18.42 to 6.18.* (incl.)
  • unaffected from 7.1.6 to 7.1.* (incl.)
  • unaffected from 7.2-rc5 to * (incl.)

References