CVE-2023-41909 Null dereference in n/a

What is CVE-2023-41909?

CVE-2023-41909 is a high-severity vulnerability in Debian Debian Linux, published on 5 Sep 2023. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

An issue was discovered in FRRouting FRR through 9.0. bgp_nlri_parse_flowspec in bgpd/bgp_flowspec.c processes malformed requests with no attributes, leading to a NULL pointer dereference.

Weakness: CWE-476

Which versions are affected by CVE-2023-41909?

It affects 3 products.

Products include Debian Debian Linux, Fedoraproject Fedora, Frrouting Frrouting.

How do I fix CVE-2023-41909?

Apply the vendor's patch.

Is CVE-2023-41909 being exploited?

There is no known exploitation of CVE-2023-41909 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 DEBIAN-CVE-2023-41909, GHSA-qvhj-42gp-xfmw, UBUNTU-CVE-2023-41909, openSUSE-SU-2024:13238-1.