PT-2026-37135 · Gobgp · Gobgp

Bacon251 · Published 2026-04-29 · Updated 2026-05-07 · CVE-2026-41642

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions GoBGP versions prior to 4.4.0

Description A remote Denial of Service (DoS) issue exists 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 leads to an illegal memory access and a full process crash (panic) instead of simply closing the affected session. The issue is located in the Finite State Machine (FSM) message handling loop within the recvMessageloop() function in the pkg/server/fsm.go file.

Recommendations Update to version 4.4.0.

Exploit

Fix

DoS

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

CVE-2026-41642

GHSA-7235-89M6-F4PX

Affected Products

Gobgp

References · 12

• 🔥 https://github.com/osrg/gobgp/security/advisories/GHSA-7235-89m6-f4px · Exploit
• https://github.com/osrg/gobgp/releases/tag/v4.4.0 · Patch
• https://security-tracker.debian.org/tracker/CVE-2026-41642 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-41642 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-7235-89m6-f4px · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-41642 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-41642 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-41642 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-41642 · Security Note
• https://github.com/osrg/gobgp · Note
• https://twitter.com/CVEnew/status/2052400778086912396 · Twitter Post
• https://t.me/cveNotify/162502 · Telegram Post