UBUNTU-CVE-2026-7736

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Source
https://ubuntu.com/security/CVE-2026-7736
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-7736.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-7736
Upstream
  • CVE-2026-7736
Downstream
Related
Published
2026-05-04T07:16:00Z
Modified
2026-06-03T09:15:18.494705058Z
Severity
  • 7.3 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L CVSS Calculator
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
  • 6.9 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

A vulnerability was determined in osrg GoBGP up to 4.3.0. Affected by this vulnerability is the function parseRibEntry of the file pkg/packet/mrt/mrt.go. Executing a manipulation can lead to integer underflow. It is possible to launch the attack remotely. Upgrading to version 4.4.0 addresses this issue. This patch is called 76d911046344a3923cbe573364197aa081944592. It is suggested to upgrade the affected component.

References

Affected packages

Ubuntu:25.10
gobgp

Package

Name
gobgp
Purl
pkg:deb/ubuntu/gobgp?arch=source&distro=questing

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

3.*
3.35.0-1
3.36.0-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "gobgpd",
            "binary_version": "3.36.0-2"
        },
        {
            "binary_name": "golang-github-osrg-gobgp-dev",
            "binary_version": "3.36.0-2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-7736.json"
Ubuntu:Pro:18.04:LTS
gobgp

Package

Name
gobgp
Purl
pkg:deb/ubuntu/gobgp?arch=source&distro=esm-apps%2Fbionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.29-1ubuntu0.1+esm2

Affected versions

1.*
1.15-1
1.29-1
1.29-1ubuntu0.1+esm1

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "gobgpd",
            "binary_version": "1.29-1ubuntu0.1+esm2"
        },
        {
            "binary_name": "golang-github-osrg-gobgp-dev",
            "binary_version": "1.29-1ubuntu0.1+esm2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-7736.json"
Ubuntu:Pro:20.04:LTS
gobgp

Package

Name
gobgp
Purl
pkg:deb/ubuntu/gobgp?arch=source&distro=esm-apps%2Ffocal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.12.0-1ubuntu0.1~esm3

Affected versions

1.*
1.33-1
2.*
2.11.0-1
2.12.0-1
2.12.0-1ubuntu0.1~esm1
2.12.0-1ubuntu0.1~esm2

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "gobgpd",
            "binary_version": "2.12.0-1ubuntu0.1~esm3"
        },
        {
            "binary_name": "golang-github-osrg-gobgp-dev",
            "binary_version": "2.12.0-1ubuntu0.1~esm3"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-7736.json"
Ubuntu:Pro:22.04:LTS
gobgp

Package

Name
gobgp
Purl
pkg:deb/ubuntu/gobgp?arch=source&distro=esm-apps%2Fjammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
2.25.0-3ubuntu0.1+esm4

Affected versions

2.*
2.25.0-2
2.25.0-3
2.25.0-3build1
2.25.0-3ubuntu0.1
2.25.0-3ubuntu0.1+esm1
2.25.0-3ubuntu0.1+esm2
2.25.0-3ubuntu0.1+esm3

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "gobgpd",
            "binary_version": "2.25.0-3ubuntu0.1+esm4"
        },
        {
            "binary_name": "golang-github-osrg-gobgp-dev",
            "binary_version": "2.25.0-3ubuntu0.1+esm4"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-7736.json"
Ubuntu:Pro:24.04:LTS
gobgp

Package

Name
gobgp
Purl
pkg:deb/ubuntu/gobgp?arch=source&distro=esm-apps%2Fnoble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
3.23.0-1ubuntu0.3+esm4

Affected versions

3.*
3.16.0-1build1
3.19.0-1
3.21.0-1
3.23.0-1
3.23.0-1ubuntu0.1
3.23.0-1ubuntu0.2
3.23.0-1ubuntu0.2+esm1
3.23.0-1ubuntu0.3
3.23.0-1ubuntu0.3+esm1
3.23.0-1ubuntu0.3+esm2
3.23.0-1ubuntu0.3+esm3

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "gobgpd",
            "binary_version": "3.23.0-1ubuntu0.3+esm4"
        },
        {
            "binary_name": "golang-github-osrg-gobgp-dev",
            "binary_version": "3.23.0-1ubuntu0.3+esm4"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-7736.json"
Ubuntu:Pro:26.04:LTS
gobgp

Package

Name
gobgp
Purl
pkg:deb/ubuntu/gobgp?arch=source&distro=esm-apps%2Fresolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
3.36.0-2ubuntu0.1~esm1

Affected versions

3.*
3.36.0-2
3.36.0-2build1

Ecosystem specific 

{
    "availability": "Available with Ubuntu Pro: https://ubuntu.com/pro",
    "binaries": [
        {
            "binary_name": "gobgpd",
            "binary_version": "3.36.0-2ubuntu0.1~esm1"
        },
        {
            "binary_name": "golang-github-osrg-gobgp-dev",
            "binary_version": "3.36.0-2ubuntu0.1~esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-7736.json"