CVE-2023-4132 Kernel: smsusb: use-after-free caused by do_submit_urb()

What is CVE-2023-4132?

CVE-2023-4132 is a medium-severity use after free vulnerability in Debian Debian Linux, published on 3 Aug 2023. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A use-after-free vulnerability was found in the siano smsusb module in the Linux kernel. The bug occurs during device initialization when the siano device is plugged in. This flaw allows a local user to crash the system, causing a denial of service condition.

Weakness: CWE-416

Which versions are affected by CVE-2023-4132?

It affects 6 products.

Products include Debian Debian Linux, Fedoraproject Fedora, Linux kernel, Redhat Enterprise Linux, Redhat Enterprise Linux for Real Time, Redhat Enterprise Linux for Real Time for Nfv.

How do I fix CVE-2023-4132?

Apply the vendor's patch.

Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.

Is CVE-2023-4132 being exploited?

There is no known exploitation of CVE-2023-4132 in the wild and no public exploit code.

Other vulnerabilities in Debian Debian Linux

• CVE-2015-3306 ProFTPD Improper Access Control Exploited Critical 10.0
• CVE-2025-49113 RoundCube Webmail Deserialization of Untrusted Data Exploited Critical 9.9
• CVE-2026-24061 GNU InetUtils Argument Injection Exploited Critical 9.8
• CVE-2025-39682 Linux Kernel Improper Check for Unusual or Exceptional Conditions Exploited Critical 9.8
• CVE-2024-9680 Mozilla Firefox Use-After-Free Exploited Critical 9.8

All Debian Debian Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as AZL-27852, DEBIAN-CVE-2023-4132, GHSA-897q-36v3-jwhm, UBUNTU-CVE-2023-4132.