CVE-2025-71151 PUBLISHED

cifs: Fix memory and information leak in smb3_reconfigure()

Assigner: Linux
Reserved: 13.01.2026 Published: 23.01.2026 Updated: 23.01.2026

In the Linux kernel, the following vulnerability has been resolved:

cifs: Fix memory and information leak in smb3_reconfigure()

In smb3_reconfigure(), if smb3_sync_session_ctx_passwords() fails, the function returns immediately without freeing and erasing the newly allocated new_password and new_password2. This causes both a memory leak and a potential information leak.

Fix this by calling kfree_sensitive() on both password buffers before returning in this error case.

Product Status

Vendor Linux
Product Linux
Versions Default: unaffected
  • affected from 880a661e67648a3ffe85405e8de5f50650a3c0b2 to bc390b2737205163e48cc1655f6a0c8cd55b02fc (excl.)
  • affected from 0e4145774c016530bf99afb3675a1a0593c35642 to 5679cc90bb5415801fa29041da0319d9e15d295d (excl.)
  • affected from 0f0e357902957fba28ed31bde0d6921c6bd1485d to bb82aaee16907dc4d0b9b0ca7953ceb3edc328c6 (excl.)
  • affected from 0f0e357902957fba28ed31bde0d6921c6bd1485d to cb6d5aa9c0f10074f1ad056c3e2278ad2cc7ec8d (excl.)
  • Version 674ba43944dab8e8f87434e25d9d10c5152584bc is affected
Vendor Linux
Product Linux
Versions Default: affected
  • Version 6.13 is affected
  • unaffected from 0 to 6.13 (excl.)
  • unaffected from 6.6.120 to 6.6.* (incl.)
  • unaffected from 6.12.64 to 6.12.* (incl.)
  • unaffected from 6.18.3 to 6.18.* (incl.)
  • unaffected from 6.19-rc3 to * (incl.)

References