7.5
HIGH
CVE-2023-32256
Linux Kernel ksmbd Use-After-Free Vulnerability
Description

A flaw was found in the Linux kernel's ksmbd component. A race condition between smb2 close operation and logoff in multichannel connections could result in a use-after-free issue.

INFO

Published Date :

Aug. 1, 2025, 6:15 p.m.

Last Modified :

Aug. 4, 2025, 3:06 p.m.

Remotely Exploitable :

Yes !

Impact Score :

4.7

Exploitability Score :

2.2
Affected Products

The following products are affected by CVE-2023-32256 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Linux linux_kernel
References to Advisories, Solutions, and Tools

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2023-32256 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2023-32256 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • New CVE Received by [email protected]

    Aug. 01, 2025

    Action Type Old Value New Value
    Added Description A flaw was found in the Linux kernel's ksmbd component. A race condition between smb2 close operation and logoff in multichannel connections could result in a use-after-free issue.
    Added CVSS V3.1 AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:H
    Added CWE CWE-421
    Added Reference https://access.redhat.com/security/cve/CVE-2023-32256
    Added Reference https://bugzilla.redhat.com/show_bug.cgi?id=2385885
    Added Reference https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=abcc506a9a71976a8b4c9bf3ee6efd13229c1e19
    Added Reference https://www.zerodayinitiative.com/advisories/ZDI-23-704/
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2023-32256 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2023-32256 weaknesses.

CVSS31 - Vulnerability Scoring System
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