PT-2026-36779 · Osrg+1 · Gobgp+1

Sunxj · Published 2026-05-04 · Updated 2026-06-03 · CVE-2026-7736

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 osrg GoBGP versions prior to 4.4.0

Description A remote attack can be launched against the parseRibEntry() function in the pkg/packet/mrt/mrt.go file, which may lead to an integer underflow. Integer underflow occurs when an arithmetic operation attempts to create a numeric value smaller than the minimum value the variable can store.

Recommendations Update to version 4.4.0. As a temporary workaround, restrict access to the parseRibEntry() function to minimize the risk of exploitation.

Fix

Integer Underflow

Weakness Enumeration

CWE-189

CWE-191

Related Identifiers

CVE-2026-7736

GHSA-HJ4W-QR9J-C4CF

USN-8348-1

Affected Products

Gobgp

Ubuntu

References · 20

• https://github.com/osrg/gobgp/releases/tag/v4.4.0 · Patch
• https://github.com/osrg/gobgp/commit/76d911046344a3923cbe573364197aa081944592 · Patch
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-7736 · Vendor Advisory
• https://osv.dev/vulnerability/USN-8348-1 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-8348-1 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-7736 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-7734 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-7736 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-hj4w-qr9j-c4cf · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-41643 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-7736 · Security Note
• https://ubuntu.com/security/CVE-2026-7737 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-7735 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-37461 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-7736 · Security Note