7.5

CVE-2026-41642: osrg gobgp NULL Pointer Dereference

CVSS: 7.5v3.1HighAnalyzed
AliasesUBUNTU-CVE-2026-41642DEBIAN-CVE-2026-41642GHSA-7235-89m6-f4px
Published 07-05-2026Last modified 07-05-2026
Open JSON

Vulnerability summary

CVE-2026-41642 is a high (CVSS 7.5) NULL Pointer Dereference vulnerability in osrg gobgp. EPSS estimates a 0.60% chance of exploitation in the next 30 days, higher than 48% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
40/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
0.60%
0%100%
Low · +0.10 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github

Advisory lineage

Upstream 0 · Downstream 3 · Related 3
OPENSUSE-SU-2026:21551-1SUSE-SU-2026:23216-1SUSE-SU-2026:23227-1

Timeline

  1. 07-05-2026
    PublishedVulnerability first disclosed.
  2. 07-05-2026
    Last modifiedVulnerability information updated.

Description

GoBGP is an open source Border Gateway Protocol (BGP) implementation in the Go Programming Language. In version 4.3.0, a remote Denial of Service (DoS) vulnerability exists in GoBGP due to a nil pointer dereference. When a malformed BGP UPDATE message contains an unrecognized Path Attribute marked as "Well-known," the daemon fails to interrupt the message handling flow. This results in an illegal memory access and a full process crash (panic). This issue has been patched in version 4.4.0.

CVSS metrics

5 scores · 5 sources · 1 version

EPSS trend

Probability

0.60%

Chance of exploitation in the next 30 days

Percentile

48%

Versus all other CVEs

30-day change

+0.10 pp

From 0.50% on 20-09-2026

20-09-202620-10-2026
EPSS score
0.60%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • githubUnverified

    Gobgp

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Debian1 product
  • gobgp< 4.4.0-1
Github.com/osrg/gobgp1 product
  • v4≥ 4.3.0, < 4.4.0
Osrg1 product
Ubuntu1 product
  • gobgpAll versions (No fix recorded)

4 vendors · 4 products

References

7 links