CVE-2026-43378 | In the Linux kernel, the following vulnerability has been re… | CVSS 9.8 CRITICAL

Description

In the Linux kernel, the following vulnerability has been resolved: smb: server: fix use-after-free in smb2_open() The opinfo pointer obtained via rcu_dereference(fp->f_opinfo) is dereferenced after rcu_read_unlock(), creating a use-after-free window.

Metadata

CVE ID: CVE-2026-43378
State: PUBLISHED
Assigner: Linux
Reserved: 2026-05-01 14:12 UTC
Published: 2026-05-08 14:21 UTC
Last updated: 2026-05-20 16:08 UTC
Vendor / Product: Linux / Linux
Sources: cve.org · NVD

Severity & Metrics

9.8 CRITICAL CVSS 3.1

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

Affected products (2)

Vendor	Product	Platform	Versions
Linux	Linux	—	e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 < e1b21e6066615e7d3d3a7aa2677e415e563fd7cc, e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 < b720c84087cb547f23ce03eab93568c1769e4556, e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 < 54b48ae83de8bb06e65079d96368efe359d4909c, e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 < 8f5b1a7cb009a93c48e9e334a2f59a660f9afc07 …
Linux	Linux	—	5.15, 0 < 5.15, 6.1.167 ≤ 6.1., 6.6.130 ≤ 6.6. …

CVSS scores (1)

Score	Severity	Version	Source	Vector
9.8	CRITICAL	3.1	cna	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References (6)