Vulnerability record · CVE-2026-45972 · published 27 May 2026

CVE-2026-45972: Linux kernel use after free vulnerability

Linux · Linux Kernel

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.

9.8 CVSS 3.1 Critical EPSS 0.47% · top 62.1% CWE-416 · Use after freeCWE-825 · CWE-825

9.8CVSS 3.1 base score

0.47%EPSS exploitation probability, 30 days

NoNot in CISA KEV

1Affected product versions listed by NVD

9References

15 Jul 2026Last modified by NVD

Description

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

Linux Kernel Linux

References

Link	Tags
https://git.kernel.org/stable/c/4d339b219004869e96c4ce56b8891f83a38da4c0	Patch
https://git.kernel.org/stable/c/639deb962986ef2f5e2a6d5a600c66f922471e81	Patch
https://git.kernel.org/stable/c/7425453ea16dbc3bbb0f6cac4d60b537e5e4d151	Patch
https://git.kernel.org/stable/c/96e53bb3ee2f354cf6b4ab07bcc56e500f8b3f74	Patch
https://git.kernel.org/stable/c/e66dcf7bb9c4df5582c82bc3582725abcbfbea73	Patch
https://git.kernel.org/stable/c/ebbbc4bfad4cb355d17c671223d0814ee3ef4eda	Patch
https://access.redhat.com/security/cve/CVE-2026-45972
https://bugzilla.redhat.com/show_bug.cgi?id=2481973
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-45972.json

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-45972), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.