CVE-2026-5123

osrg GoBGP bgp.go DecodeFromBytes off-by-one

LOW
3.7
CVSS Score
Published: March 30, 2026 at 03:15 PM UTC
Updated: June 17, 2026 at 10:58 AM UTC
1 product affected across 1 vendorGoBGP

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Severity
LOW3.7
Exploit prediction
EPSS 0.4%
SSVC
No known exploit

Description

A weakness has been identified in osrg GoBGP up to 4.3.0. This impacts the function DecodeFromBytes of the file pkg/packet/bgp/bgp.go. Executing a manipulation of the argument data[1] can lead to off-by-one. The attack may be launched remotely. Attacks of this nature are highly complex. The exploitability is said to be difficult. This patch is called 67c059413470df64bc20801c46f64058e88f800f. A patch should be applied to remediate this issue.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 4.4.04.04.14.24.3.0

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (6)

VDB EntryTechnical DescriptionThird Party Advisory
Source: cverecord
https://vuldb.com/vuln/354155
SignaturePermissions RequiredVDB Entry
Source: cverecord
https://vuldb.com/vuln/354155/cti
Third Party AdvisoryVDB Entry
Source: cverecord
https://vuldb.com/submit/780179
Issue TrackingPatch
Source: cverecord
https://github.com/osrg/gobgp/pull/3342
Product
Source: cverecord
https://github.com/osrg/gobgp/

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

3.7LOWVulDB
Vector?

Quick Info

StatusANALYZED
CWE
CWE-193CWE-189

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