CVE-2023-1855 Use after free in Kernel

What is CVE-2023-1855?

CVE-2023-1855 is a medium-severity use after free vulnerability in Debian Debian Linux, published on 5 Apr 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 flaw was found in xgene_hwmon_remove in drivers/hwmon/xgene-hwmon.c in the Hardware Monitoring Linux Kernel Driver (xgene-hwmon). This flaw could allow a local attacker to crash the system due to a race problem. This vulnerability could even lead to a kernel information leak problem.

Weakness: CWE-416

Which versions are affected by CVE-2023-1855?

It affects 2 products.

Products include Debian Debian Linux, Linux kernel.

How do I fix CVE-2023-1855?

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-2023-1855 being exploited?

There is no known exploitation of CVE-2023-1855 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-26033, AZL-26142, DEBIAN-CVE-2023-1855, GHSA-4j6m-cxx4-9x6q, UBUNTU-CVE-2023-1855.