UBUNTU-CVE-2026-56789

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Source
https://ubuntu.com/security/CVE-2026-56789
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-56789.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-56789
Upstream
  • CVE-2026-56789
Published
2026-06-25T19:16:00Z
Modified
2026-06-29T23:19:15.991292981Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H CVSS Calculator
  • 7.1 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

RTKLIB through 2.4.3 contains a heap buffer overflow vulnerability in the readrnxobsb function in src/rinex.c that allows attackers to trigger memory corruption by failing to clamp satellite count values from RINEX epoch headers. Attackers can craft malicious RINEX files declaring more than 64 satellites per epoch to cause heap buffer overflow writes and out-of-bounds stack reads, crashing RTKLIB-based applications including rnx2rtkp and RTKPOST.

References

Affected packages

Ubuntu:18.04:LTS
rtklib

Package

Name
rtklib
Purl
pkg:deb/ubuntu/rtklib?arch=source&distro=bionic

Affected ranges

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

Affected versions

2.*
2.4.3+dfsg1-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "rtklib",
            "binary_version": "2.4.3+dfsg1-1"
        },
        {
            "binary_name": "rtklib-qt",
            "binary_version": "2.4.3+dfsg1-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-56789.json"
Ubuntu:20.04:LTS
rtklib

Package

Name
rtklib
Purl
pkg:deb/ubuntu/rtklib?arch=source&distro=focal

Affected ranges

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

Affected versions

2.*
2.4.3+dfsg1-1
2.4.3+dfsg1-2.1
2.4.3+dfsg1-2.1build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "rtklib",
            "binary_version": "2.4.3+dfsg1-2.1build1"
        },
        {
            "binary_name": "rtklib-qt",
            "binary_version": "2.4.3+dfsg1-2.1build1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-56789.json"
Ubuntu:22.04:LTS
rtklib

Package

Name
rtklib
Purl
pkg:deb/ubuntu/rtklib?arch=source&distro=jammy

Affected ranges

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

Affected versions

2.*
2.4.3+dfsg1-2.1build1
2.4.3.b34+dfsg-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "librtklib1",
            "binary_version": "2.4.3.b34+dfsg-1"
        },
        {
            "binary_name": "rtklib",
            "binary_version": "2.4.3.b34+dfsg-1"
        },
        {
            "binary_name": "rtklib-qt",
            "binary_version": "2.4.3.b34+dfsg-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-56789.json"
Ubuntu:24.04:LTS
rtklib

Package

Name
rtklib
Purl
pkg:deb/ubuntu/rtklib?arch=source&distro=noble

Affected ranges

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

Affected versions

2.*
2.4.3.b34+dfsg-1
2.4.3.b34+dfsg-1build1
2.4.3.b34+dfsg-1build2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "librtklib1",
            "binary_version": "2.4.3.b34+dfsg-1build2"
        },
        {
            "binary_name": "rtklib",
            "binary_version": "2.4.3.b34+dfsg-1build2"
        },
        {
            "binary_name": "rtklib-qt",
            "binary_version": "2.4.3.b34+dfsg-1build2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-56789.json"
Ubuntu:25.10
rtklib

Package

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

Affected ranges

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

Affected versions

2.*
2.4.3.b34+dfsg-1build2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "librtklib1",
            "binary_version": "2.4.3.b34+dfsg-1build2"
        },
        {
            "binary_name": "rtklib",
            "binary_version": "2.4.3.b34+dfsg-1build2"
        },
        {
            "binary_name": "rtklib-qt",
            "binary_version": "2.4.3.b34+dfsg-1build2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-56789.json"
Ubuntu:26.04:LTS
rtklib

Package

Name
rtklib
Purl
pkg:deb/ubuntu/rtklib?arch=source&distro=resolute

Affected ranges

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

Affected versions

2.*
2.4.3.b34+dfsg-1build2
2.4.3.b34+dfsg-1build3

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "librtklib1",
            "binary_version": "2.4.3.b34+dfsg-1build3"
        },
        {
            "binary_name": "rtklib",
            "binary_version": "2.4.3.b34+dfsg-1build3"
        },
        {
            "binary_name": "rtklib-qt",
            "binary_version": "2.4.3.b34+dfsg-1build3"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-56789.json"