CVE-2026-45972

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

CVSS 9.8 CRITICALEPSS 0.5%

Vexday Risk Score

28Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 9.8EPSS 0.5%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

27 May 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Linux · Linux

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References

https://git.kernel.org/stable/c/4d339b219004869e96c4ce56b8891f83a38da4c0 https://git.kernel.org/stable/c/639deb962986ef2f5e2a6d5a600c66f922471e81 https://git.kernel.org/stable/c/7425453ea16dbc3bbb0f6cac4d60b537e5e4d151 https://git.kernel.org/stable/c/96e53bb3ee2f354cf6b4ab07bcc56e500f8b3f74 https://git.kernel.org/stable/c/e66dcf7bb9c4df5582c82bc3582725abcbfbea73 https://git.kernel.org/stable/c/ebbbc4bfad4cb355d17c671223d0814ee3ef4eda