CVE-2026-43378 Details
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.
A use-after-free vulnerability has been fixed in the Linux kernel's SMB2 server implementation, specifically within the 'smb2_open' function. The issue arose because the 'opinfo' pointer, retrieved using 'rcu_dereference(fp->f_opinfo)', was dereferenced after releasing the RCU read lock, creating a window for potential exploitation.
Users can upgrade to the latest version of the Linux kernel where this vulnerability has been addressed.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://git.kernel.org/stable/c/190e5f808e8058640b408ccfed25440b441a718a | kernel.org | Patch |
| https://git.kernel.org/stable/c/1e689a56173827669a35da7cb2a3c78ed5c53680 | kernel.org | Patch |
| https://git.kernel.org/stable/c/54b48ae83de8bb06e65079d96368efe359d4909c | kernel.org | Patch |
| https://git.kernel.org/stable/c/8f5b1a7cb009a93c48e9e334a2f59a660f9afc07 | kernel.org | Patch |
| https://git.kernel.org/stable/c/b720c84087cb547f23ce03eab93568c1769e4556 | kernel.org | Patch |
| https://git.kernel.org/stable/c/e1b21e6066615e7d3d3a7aa2677e415e563fd7cc | kernel.org | Patch |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-416 | Use After Free | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| linux linux kernel | >= 5.15, < 6.1.167 >= 6.2, < 6.6.130 >= 6.7, < 6.12.78 >= 6.13, < 6.18.19 >= 6.19, < 6.19.9 7.0 rc1 7.0 rc2 7.0 rc3 |
CPE
Remediation
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Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | kernel.org |
| May 20, 2026 | CVE Modified | kernel.org |
| May 19, 2026 | Initial Analysis | [email protected] |
| May 8, 2026 | New CVE Received | kernel.org |