PT-2026-43839 · Linux · Linux

Published 2026-05-27 · Updated 2026-05-27 · CVE-2026-45972

Mitre

CVSS v3.1

9.8

Critical

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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.

Fix

Related Identifiers

CVE-2026-45972

Affected Products

Linux

References · 7

• https://nvd.nist.gov/vuln/detail/CVE-2026-45972 · Security Note
• https://git.kernel.org/stable/c/7425453ea16dbc3bbb0f6cac4d60b537e5e4d151 · Note
• https://git.kernel.org/stable/c/96e53bb3ee2f354cf6b4ab07bcc56e500f8b3f74 · Note
• https://git.kernel.org/stable/c/ebbbc4bfad4cb355d17c671223d0814ee3ef4eda · Note
• https://git.kernel.org/stable/c/e66dcf7bb9c4df5582c82bc3582725abcbfbea73 · Note
• https://git.kernel.org/stable/c/639deb962986ef2f5e2a6d5a600c66f922471e81 · Note
• https://git.kernel.org/stable/c/4d339b219004869e96c4ce56b8891f83a38da4c0 · Note