CVE-2026-45972 PUBLISHED

smb: client: fix potential UAF and double free in smb2_open_file()

Assigner: Linux
Reserved: 13.05.2026 Published: 27.05.2026 Updated: 27.05.2026

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

smb: client: fix potential UAF and double free in smb2_open_file()

Zero out @err_iov and @err_buftype before retrying SMB2_open() to prevent an UAF bug if @data != NULL, otherwise a double free.

Vendor	Linux
Product	Linux
Versions	Default: unaffected affected from 743f70406264348c0830f38409eb6c40a42fb2db to 96e53bb3ee2f354cf6b4ab07bcc56e500f8b3f74 (excl.) affected from 3a6d6b332f92990958602c1e35ce0173e2dd62e9 to 7425453ea16dbc3bbb0f6cac4d60b537e5e4d151 (excl.) affected from b64e3b5d8d759dd4333992e4ba4dadf9359952c8 to 4d339b219004869e96c4ce56b8891f83a38da4c0 (excl.) affected from 9ee608a64e37cea5b4b13e436c559dd0fb2ad1b5 to e66dcf7bb9c4df5582c82bc3582725abcbfbea73 (excl.) affected from e3a43633023e3cacaca60d4b8972d084a2b06236 to 639deb962986ef2f5e2a6d5a600c66f922471e81 (excl.) affected from e3a43633023e3cacaca60d4b8972d084a2b06236 to ebbbc4bfad4cb355d17c671223d0814ee3ef4eda (excl.) affected from 6.1.163 to 6.1.165 (excl.) affected from 6.6.124 to 6.6.128 (excl.) affected from 6.12.70 to 6.12.75 (excl.) affected from 6.18.10 to 6.18.14 (excl.)

Vendor	Linux
Product	Linux
Versions	Default: affected Version 6.19 is affected unaffected from 0 to 6.19 (excl.) unaffected from 6.1.165 to 6.1.* (incl.) unaffected from 6.6.128 to 6.6.* (incl.) unaffected from 6.12.75 to 6.12.* (incl.) unaffected from 6.18.14 to 6.18.* (incl.) unaffected from 6.19.4 to 6.19.* (incl.) unaffected from 7.0 to * (incl.)