UBUNTU-CVE-2026-0994

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Source
https://ubuntu.com/security/CVE-2026-0994
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-0994.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-0994
Upstream
  • CVE-2026-0994
Downstream
Related
Published
2026-01-23T15:16:00Z
Modified
2026-02-28T06:16:59.091824Z
Severity
  • 8.2 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:L CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

A denial-of-service (DoS) vulnerability exists in google.protobuf.jsonformat.ParseDict() in Python, where the maxrecursion_depth limit can be bypassed when parsing nested google.protobuf.Any messages. Due to missing recursion depth accounting inside the internal Any-handling logic, an attacker can supply deeply nested Any structures that bypass the intended recursion limit, eventually exhausting Python’s recursion stack and causing a RecursionError.

References

Affected packages

Ubuntu:Pro:18.04:LTS / protobuf

Package

Name
protobuf
Purl
pkg:deb/ubuntu/protobuf@3.0.0-9.1ubuntu1.1+esm3?arch=source&distro=esm-infra/bionic

Affected ranges

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

Affected versions

3.*
3.0.0-9ubuntu5
3.0.0-9ubuntu6
3.0.0-9.1ubuntu1
3.0.0-9.1ubuntu1.1
3.0.0-9.1ubuntu1.1+esm3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "3.0.0-9.1ubuntu1.1+esm3",
            "binary_name": "libprotobuf-dev"
        },
        {
            "binary_version": "3.0.0-9.1ubuntu1.1+esm3",
            "binary_name": "libprotobuf-java"
        },
        {
            "binary_version": "3.0.0-9.1ubuntu1.1+esm3",
            "binary_name": "libprotobuf-lite10"
        },
        {
            "binary_version": "3.0.0-9.1ubuntu1.1+esm3",
            "binary_name": "libprotobuf10"
        },
        {
            "binary_version": "3.0.0-9.1ubuntu1.1+esm3",
            "binary_name": "libprotoc-dev"
        },
        {
            "binary_version": "3.0.0-9.1ubuntu1.1+esm3",
            "binary_name": "libprotoc10"
        },
        {
            "binary_version": "3.0.0-9.1ubuntu1.1+esm3",
            "binary_name": "protobuf-compiler"
        },
        {
            "binary_version": "3.0.0-9.1ubuntu1.1+esm3",
            "binary_name": "python-protobuf"
        },
        {
            "binary_version": "3.0.0-9.1ubuntu1.1+esm3",
            "binary_name": "python3-protobuf"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-0994.json"

Ubuntu:Pro:20.04:LTS / protobuf

Package

Name
protobuf
Purl
pkg:deb/ubuntu/protobuf@3.6.1.3-2ubuntu5.2+esm2?arch=source&distro=esm-infra/focal

Affected ranges

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

Affected versions

3.*
3.6.1.3-2
3.6.1.3-2ubuntu1
3.6.1.3-2ubuntu3
3.6.1.3-2ubuntu4
3.6.1.3-2ubuntu5
3.6.1.3-2ubuntu5.2
3.6.1.3-2ubuntu5.2+esm2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "3.6.1.3-2ubuntu5.2+esm2",
            "binary_name": "libprotobuf-dev"
        },
        {
            "binary_version": "3.6.1.3-2ubuntu5.2+esm2",
            "binary_name": "libprotobuf-java"
        },
        {
            "binary_version": "3.6.1.3-2ubuntu5.2+esm2",
            "binary_name": "libprotobuf-lite17"
        },
        {
            "binary_version": "3.6.1.3-2ubuntu5.2+esm2",
            "binary_name": "libprotobuf17"
        },
        {
            "binary_version": "3.6.1.3-2ubuntu5.2+esm2",
            "binary_name": "libprotoc-dev"
        },
        {
            "binary_version": "3.6.1.3-2ubuntu5.2+esm2",
            "binary_name": "libprotoc17"
        },
        {
            "binary_version": "3.6.1.3-2ubuntu5.2+esm2",
            "binary_name": "protobuf-compiler"
        },
        {
            "binary_version": "3.6.1.3-2ubuntu5.2+esm2",
            "binary_name": "python-protobuf"
        },
        {
            "binary_version": "3.6.1.3-2ubuntu5.2+esm2",
            "binary_name": "python3-protobuf"
        },
        {
            "binary_version": "3.6.1.3-2ubuntu5.2+esm2",
            "binary_name": "ruby-google-protobuf"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-0994.json"

Ubuntu:22.04:LTS / protobuf

Package

Name
protobuf
Purl
pkg:deb/ubuntu/protobuf@3.12.4-1ubuntu7.22.04.6?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
3.12.4-1ubuntu7.22.04.6

Affected versions

3.*
3.12.4-1ubuntu3
3.12.4-1ubuntu5
3.12.4-1ubuntu6
3.12.4-1ubuntu7
3.12.4-1ubuntu7.22.04.1
3.12.4-1ubuntu7.22.04.2
3.12.4-1ubuntu7.22.04.4

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "3.12.4-1ubuntu7.22.04.6",
            "binary_name": "elpa-protobuf-mode"
        },
        {
            "binary_version": "3.12.4-1ubuntu7.22.04.6",
            "binary_name": "libprotobuf-dev"
        },
        {
            "binary_version": "3.12.4-1ubuntu7.22.04.6",
            "binary_name": "libprotobuf-java"
        },
        {
            "binary_version": "3.12.4-1ubuntu7.22.04.6",
            "binary_name": "libprotobuf-lite23"
        },
        {
            "binary_version": "3.12.4-1ubuntu7.22.04.6",
            "binary_name": "libprotobuf23"
        },
        {
            "binary_version": "3.12.4-1ubuntu7.22.04.6",
            "binary_name": "libprotoc-dev"
        },
        {
            "binary_version": "3.12.4-1ubuntu7.22.04.6",
            "binary_name": "libprotoc23"
        },
        {
            "binary_version": "3.12.4-1ubuntu7.22.04.6",
            "binary_name": "protobuf-compiler"
        },
        {
            "binary_version": "3.12.4-1ubuntu7.22.04.6",
            "binary_name": "python3-protobuf"
        },
        {
            "binary_version": "3.12.4-1ubuntu7.22.04.6",
            "binary_name": "ruby-google-protobuf"
        }
    ],
    "availability": "No subscription required"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-0994.json"

Ubuntu:24.04:LTS / protobuf

Package

Name
protobuf
Purl
pkg:deb/ubuntu/protobuf@3.21.12-8.2ubuntu0.3?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
3.21.12-8.2ubuntu0.3

Affected versions

3.*
3.21.12-7ubuntu1
3.21.12-8ubuntu1
3.21.12-8ubuntu5
3.21.12-8.2
3.21.12-8.2build1
3.21.12-8.2ubuntu0.1
3.21.12-8.2ubuntu0.2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "3.21.12-8.2ubuntu0.3",
            "binary_name": "elpa-protobuf-mode"
        },
        {
            "binary_version": "3.21.12-8.2ubuntu0.3",
            "binary_name": "libprotobuf-dev"
        },
        {
            "binary_version": "3.21.12-8.2ubuntu0.3",
            "binary_name": "libprotobuf-java"
        },
        {
            "binary_version": "3.21.12-8.2ubuntu0.3",
            "binary_name": "libprotobuf-lite32t64"
        },
        {
            "binary_version": "3.21.12-8.2ubuntu0.3",
            "binary_name": "libprotobuf32t64"
        },
        {
            "binary_version": "3.21.12-8.2ubuntu0.3",
            "binary_name": "libprotoc-dev"
        },
        {
            "binary_version": "3.21.12-8.2ubuntu0.3",
            "binary_name": "libprotoc32t64"
        },
        {
            "binary_version": "3.21.12-8.2ubuntu0.3",
            "binary_name": "php-google-protobuf"
        },
        {
            "binary_version": "3.21.12-8.2ubuntu0.3",
            "binary_name": "protobuf-compiler"
        },
        {
            "binary_version": "3.21.12-8.2ubuntu0.3",
            "binary_name": "python3-protobuf"
        },
        {
            "binary_version": "3.21.12-8.2ubuntu0.3",
            "binary_name": "ruby-google-protobuf"
        }
    ],
    "availability": "No subscription required"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-0994.json"

Ubuntu:25.10 / protobuf

Package

Name
protobuf
Purl
pkg:deb/ubuntu/protobuf@3.21.12-11ubuntu3.1?arch=source&distro=questing

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
3.21.12-11ubuntu3.1

Affected versions

3.*
3.21.12-10build2
3.21.12-11
3.21.12-11ubuntu1
3.21.12-11ubuntu3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "3.21.12-11ubuntu3.1",
            "binary_name": "elpa-protobuf-mode"
        },
        {
            "binary_version": "3.21.12-11ubuntu3.1",
            "binary_name": "libprotobuf-dev"
        },
        {
            "binary_version": "3.21.12-11ubuntu3.1",
            "binary_name": "libprotobuf-java"
        },
        {
            "binary_version": "3.21.12-11ubuntu3.1",
            "binary_name": "libprotobuf-lite32t64"
        },
        {
            "binary_version": "3.21.12-11ubuntu3.1",
            "binary_name": "libprotobuf32t64"
        },
        {
            "binary_version": "3.21.12-11ubuntu3.1",
            "binary_name": "libprotoc-dev"
        },
        {
            "binary_version": "3.21.12-11ubuntu3.1",
            "binary_name": "libprotoc32t64"
        },
        {
            "binary_version": "3.21.12-11ubuntu3.1",
            "binary_name": "php-google-protobuf"
        },
        {
            "binary_version": "3.21.12-11ubuntu3.1",
            "binary_name": "protobuf-compiler"
        },
        {
            "binary_version": "3.21.12-11ubuntu3.1",
            "binary_name": "python3-protobuf"
        },
        {
            "binary_version": "3.21.12-11ubuntu3.1",
            "binary_name": "ruby-google-protobuf"
        }
    ],
    "availability": "No subscription required"
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-0994.json"