CVE-2026-43378
smb: server: fix use-after-free in smb2_open()
CVSS Score
9.8
EPSS Score
0.0%
EPSS Percentile
2th
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.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | May 8, 2026 |
| Last Updated | May 20, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
Linux / Linux
e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 < e1b21e6066615e7d3d3a7aa2677e415e563fd7cc e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 < b720c84087cb547f23ce03eab93568c1769e4556 e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 < 54b48ae83de8bb06e65079d96368efe359d4909c e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 < 8f5b1a7cb009a93c48e9e334a2f59a660f9afc07 e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 < 190e5f808e8058640b408ccfed25440b441a718a e2f34481b24db2fd634b5edb0a5bd0e4d38cc6e9 < 1e689a56173827669a35da7cb2a3c78ed5c53680
Linux / Linux
5.15
References
git.kernel.org: https://git.kernel.org/stable/c/e1b21e6066615e7d3d3a7aa2677e415e563fd7cc git.kernel.org: https://git.kernel.org/stable/c/b720c84087cb547f23ce03eab93568c1769e4556 git.kernel.org: https://git.kernel.org/stable/c/54b48ae83de8bb06e65079d96368efe359d4909c git.kernel.org: https://git.kernel.org/stable/c/8f5b1a7cb009a93c48e9e334a2f59a660f9afc07 git.kernel.org: https://git.kernel.org/stable/c/190e5f808e8058640b408ccfed25440b441a718a git.kernel.org: https://git.kernel.org/stable/c/1e689a56173827669a35da7cb2a3c78ed5c53680