CVE-2023-23455 Denial of service in n/a

What is CVE-2023-23455?

CVE-2023-23455 is a medium-severity denial of service vulnerability in Debian Debian Linux, published on 12 Jan 2023. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

atm_tc_enqueue in net/sched/sch_atm.c in the Linux kernel through 6.1.4 allows attackers to cause a denial of service because of type confusion (non-negative numbers can sometimes indicate a TC_ACT_SHOT condition rather than valid classification results).

Weakness: CWE-843

Which versions are affected by CVE-2023-23455?

It affects 2 products.

Products include Debian Debian Linux, Linux kernel.

How do I fix CVE-2023-23455?

Apply the vendor's patch.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2023-23455 being exploited?

There is no known exploitation of CVE-2023-23455 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-13007, DEBIAN-CVE-2023-23455, GHSA-vc7q-ccw5-jgw8, UBUNTU-CVE-2023-23455.