CVE-2026-43378

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

Critical · published May 8, 2026

CVSS v3.1
9.8
EPSS
0%
Percentile
22.4
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00308 · 22.4th percentile
Published
2026-05-08T14:21Z
EPSS history
Timeline
  • 08 MAY 14:21Z
    smb: server: fix use-after-free in smb2_open()
    cvelistv5