What is CVE-2024-31949?

CVE-2024-31949 is a medium-severity vulnerability in Frrouting, classified under Loop with Unreachable Exit Condition (Infinite Loop). CVSS score: 6.5/10. Published 2024-04-07.

How severe is CVE-2024-31949?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Frrouting

CVE-2024-31949

In FRRouting (FRR) through 9.1, an infinite loop can occur when receiving a MP/GR capability as a dynamic capability because malformed data results in a pointer not advancing.

Published 2024-04-07 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.007 (51.3th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 51st percentile — 51.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

Frrouting

Weakness classification (CWE)

CWE-835 — Loop with Unreachable Exit Condition (Infinite Loop)

References

github.com/FRRouting/frr/pull/15640 (Issue Tracking)
github.com/FRRouting/frr/pull/15640/commits/30a332dad86fafd2b0b6c61d23de59ed969… (Patch)
lists.debian.org/debian-lts-announce/2024/04/msg00019.html (mailing-list, Mailing List)
af854a3a-2127-422b-91ae-364da2661108

Frequently asked questions

What is CVE-2024-31949?: CVE-2024-31949 is a medium-severity vulnerability in Frrouting, classified under Loop with Unreachable Exit Condition (Infinite Loop). CVSS score: 6.5/10. Published 2024-04-07.
How severe is CVE-2024-31949?: Medium severity. CVSS v3 base score is 6.5 out of 10.