GoBGP: Integer underflow in the BGPUpdate.DecodeFromBytes function

HIGH 7.5CVE-2026-37462 · GHSA-pw7p-7fqv-hpj8 · GO-2026-5971 · Published 03/06/2026 · updated 22/07/2026

In short

CVE-2026-37462 is a HIGH (CVSS 7.5) vulnerability affecting github.com/osrg/gobgp/v4.
Chance of exploitation in the next 30 days (EPSS): 0.28%, higher than 20.4% of all vulnerabilities.
Fix: update to 4.4.0 or later.

Package	Affected versions	Patched versions
github.com/osrg/gobgp/v4 Go	`< 4.4.0`	`4.4.0`

Description

An integer underflow in the BGPUpdate.DecodeFromBytes function (/bgp/bgp.go) of gobgp v4.3.0 allows attackers to cause a Denial of Service (DoS) via supplying a crafted BGP UPDATE message.

NVD description

An integer underflow in the BGPUpdate.DecodeFromBytes function (/bgp/bgp.go) of gobgp v4.3.0 allows attackers to cause a Denial of Service (DoS) via supplying a crafted BGP UPDATE message.

References

nvd.nist.gov/vuln/detail/CVE-2026-37462 · ADVISORY
osrg/gobgp commit 9ce8936 · WEB
osrg/gobgp · PACKAGE
osrg/gobgp · WEB
GitHub Advisory GHSA-pw7p-7fqv-hpj8 · ADVISORY

More vulnerabilities in github.com/osrg/gobgp/v4

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Package

Affected versions

Patched versions

github.com/osrg/gobgp/v4

< 4.4.0

4.4.0

Description

An integer underflow in the BGPUpdate.DecodeFromBytes function (/bgp/bgp.go) of gobgp v4.3.0 allows attackers to cause a Denial of Service (DoS) via supplying a crafted BGP UPDATE message.

NVD description

An integer underflow in the BGPUpdate.DecodeFromBytes function (/bgp/bgp.go) of gobgp v4.3.0 allows attackers to cause a Denial of Service (DoS) via supplying a crafted BGP UPDATE message.

More vulnerabilities in github.com/osrg/gobgp/v4

See all →