CVE-2026-43378

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Source

https://cve.org/CVERecord?id=CVE-2026-43378

Import Source

JSON Data

https://api.test.osv.dev/v1/vulns/CVE-2026-43378

Downstream

Published

2026-05-08T14:21:27Z

Modified

2026-08-12T03:30:43Z

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 rcu_dereference(fp->f_opinfo) is dereferenced after rcu_read_unlock(), creating a use-after-free window.

Database specific

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

References

Affected packages

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

source

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

source

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