CVE-2026-7734

Publication date 4 May 2026

Last updated 6 June 2026

Ubuntu priority

Cvss 3 Severity Score

Description

A vulnerability has been found in osrg GoBGP up to 4.3.0. This impacts the function SRv6L3ServiceAttribute.DecodeFromBytes of the file pkg/packet/bgp/prefix_sid.go of the component SRv6 L3 Service. Such manipulation of the argument data leads to denial of service. The attack may be performed from remote. Upgrading to version 4.4.0 will fix this issue. The name of the patch is f9f7b55ec258e514be0264871fa645a2c3edad11. You should upgrade the affected component.

Status

Show unmaintained releases

Package	Ubuntu Release	Status
gobgp	26.04 LTS resolute	Fixed 3.36.0-2ubuntu0.1~esm1
	25.10 questing	Vulnerable
	24.04 LTS noble	Fixed 3.23.0-1ubuntu0.3+esm4
	22.04 LTS jammy	Fixed 2.25.0-3ubuntu0.1+esm4
	20.04 LTS focal	Not affected
	18.04 LTS bionic	Not affected

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Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package	Patch details
gobgp	Upstream: f9f7b55

Severity score breakdown

Parameter	Value
Base score	5.3 · Medium
Attack vector	Network
Attack complexity	Low
Privileges required	None
User interaction	None
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	Low
Vector	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

References

Related Ubuntu Security Notices (USN)

USN-8348-1
GoBGP vulnerabilities
3 June 2026