CVE-2026-43378

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Source
https://cve.org/CVERecord?id=CVE-2026-43378
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-43378.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2026-43378
Downstream
Published
2026-05-08T14:21:27.319Z
Modified
2026-06-18T03:55:31.054036427Z
Severity
  • 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
smb: server: fix use-after-free in smb2_open()
Details

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

smb: server: fix use-after-free in smb2_open()

The opinfo pointer obtained via rcudereference(fp->fopinfo) is dereferenced after rcureadunlock(), creating a use-after-free window.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43378.json",
    "cna_assigner": "Linux"
}
References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9
Fixed
e1b21e6066615e7d3d3a7aa2677e415e563fd7cc
Fixed
b720c84087cb547f23ce03eab93568c1769e4556
Fixed
54b48ae83de8bb06e65079d96368efe359d4909c
Fixed
8f5b1a7cb009a93c48e9e334a2f59a660f9afc07
Fixed
190e5f808e8058640b408ccfed25440b441a718a
Fixed
1e689a56173827669a35da7cb2a3c78ed5c53680

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-43378.json"

Linux / Kernel

Package

Name
Kernel

Affected ranges

Type
ECOSYSTEM
Events
Introduced
5.15.0
Fixed
6.1.167
Type
ECOSYSTEM
Events
Introduced
6.2.0
Fixed
6.6.130
Type
ECOSYSTEM
Events
Introduced
6.7.0
Fixed
6.12.78
Type
ECOSYSTEM
Events
Introduced
6.13.0
Fixed
6.18.19
Type
ECOSYSTEM
Events
Introduced
6.19.0
Fixed
6.19.9

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-43378.json"