CVE-2026-43378

HIGH EPSS 22.5%
Published May 8, 20261mo ago · Modified Jun 17, 20262w ago
7.8 CVSS 3.1
High
Find Similar
Published May 8, 2026 1mo ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
7.8
Exploitability
1.8
Impact
5.9
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
22.5% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-416 Use After Free Memory Safety

Affected Products 8

VendorProductVersionRange
linuxlinux_kernel*≥5.15  –  <6.1.167
linuxlinux_kernel*≥6.2  –  <6.6.130
linuxlinux_kernel*≥6.7  –  <6.12.78
linuxlinux_kernel*≥6.13  –  <6.18.19
linuxlinux_kernel*≥6.19  –  <6.19.9
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any

References 6

  • git.kernel.org https://git.kernel.org/stable/c/190e5f808e8058640b408ccfed25440b441a718a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/1e689a56173827669a35da7cb2a3c78ed5c53680
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/54b48ae83de8bb06e65079d96368efe359d4909c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/8f5b1a7cb009a93c48e9e334a2f59a660f9afc07
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b720c84087cb547f23ce03eab93568c1769e4556
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e1b21e6066615e7d3d3a7aa2677e415e563fd7cc
    Patch

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/190e5f808e8058640b408ccfed25440b441a718a
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/1e689a56173827669a35da7cb2a3c78ed5c53680
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/54b48ae83de8bb06e65079d96368efe359d4909c
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/8f5b1a7cb009a93c48e9e334a2f59a660f9afc07
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b720c84087cb547f23ce03eab93568c1769e4556
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/e1b21e6066615e7d3d3a7aa2677e415e563fd7cc
    Patch