| Name | CVE-2026-37459 |
| Description | An integer underflow in FRRouting (FRR) stable/10.0 to stable/10.6 allows attackers to cause a Denial of Service (DoS) via supplying a crafted BGP UPDATE message. |
| Source | CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more) |
Vulnerable and fixed packages
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|
| frr (PTS) | bullseye | 7.5.1-1.1+deb11u2 | vulnerable |
| bullseye (security) | 7.5.1-1.1+deb11u4 | vulnerable |
| bookworm | 8.4.4-1.1~deb12u1 | fixed |
| bookworm (security) | 8.4.4-1.1~deb12u2 | fixed |
| trixie | 10.3-3 | fixed |
| trixie (security) | 10.3-3+deb13u1 | fixed |
| forky, sid | 10.6.1-2 | fixed |
The information below is based on the following data on fixed versions.
| Package | Type | Release | Fixed Version | Urgency | Origin | Debian Bugs |
|---|
| frr | source | bookworm | (not affected) | | | |
| frr | source | trixie | (not affected) | | | |
| frr | source | (unstable) | 10.6.0-2 | | | |
Notes
[trixie] - frr <not-affected> (Vulnerable code introduced since 10.4)
[bookworm] - frr <not-affected> (Vulnerable code not present)
https://github.com/FRRouting/frr/commit/693a2e02687cdc9d16501275e05136edea9650d9 (master)
https://github.com/FRRouting/frr/commit/854c4c579cbf3d799730bf7d4a584186954ce1da (frr-10.6.0)