BaseFortify

Publication date: 2025-12-16

Last updated on: 2025-12-18

Assigner: kernel.org

Description

In the Linux kernel, the following vulnerability has been resolved: ksmbd: close accepted socket when per-IP limit rejects connection When the per-IP connection limit is exceeded in ksmbd_kthread_fn(), the code sets ret = -EAGAIN and continues the accept loop without closing the just-accepted socket. That leaks one socket per rejected attempt from a single IP and enables a trivial remote DoS. Release client_sk before continuing. This bug was found with ZeroPath.

CVSS Scores

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Meta Information

Published

2025-12-16

Last Modified

2025-12-18

Generated

2026-07-06

AI Q&A

2025-12-16

EPSS Evaluated

2026-07-05

NVD

CVE-2025-68246

Affected Vendors & Products

Vendor	Product	Version / Range
linux	kernel	*

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-UNKNOWN

Attack-Flow Graph

Executive Summary

This vulnerability occurs in the Linux kernel's ksmbd component, where when the per-IP connection limit is exceeded, the code fails to close the newly accepted socket. Instead, it sets an error and continues accepting connections, which causes a socket to be leaked for each rejected connection attempt from a single IP. This leads to resource exhaustion and enables a trivial remote denial-of-service (DoS) attack.

Impact Analysis

The vulnerability can impact you by allowing an attacker to exhaust system resources through leaking sockets when the per-IP connection limit is exceeded. This can cause a denial-of-service (DoS) condition, making the affected system unresponsive or unable to accept legitimate connections.

Mitigation Strategies

To mitigate this vulnerability, update your Linux kernel to a version where the ksmbd per-IP connection limit bug is fixed. This fix ensures that accepted sockets are properly closed when the per-IP limit is exceeded, preventing socket leaks and remote DoS attacks.

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