Improper resource shutdown or release in frr - CVE-2024-55553
Published: September 25, 2025
Vulnerability identifier: #VU116116
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2024-55553
CWE-ID: CWE-404
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: frrouting.org
Affected software:
frr
frr
Detailed vulnerability description
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to the application revalidates all routes if the total size of an update received via RTR exceeds the internal socket's buffer size, default 4K on most OSes. A remote attacker can trigger re-parsing of the RIB for FRR routers using RTR by causing more than this number of updates during an update interval (usually 30 minutes).
How to mitigate CVE-2024-55553
Install updates from vendor's website.