UBUNTU-CVE-2026-84838

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Source
https://ubuntu.com/security/CVE-2026-84838
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-84838.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-84838
Upstream
  • CVE-2026-84838
Published
2026-09-03T00:00:00Z
Modified
2026-09-03T22:53:13.467763421Z
Severity
  • 7.8 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

A flaw was found in rpmuncompress. This command injection vulnerability allows a local attacker to execute arbitrary commands. This occurs when rpmuncompress processes a specially crafted archive filename containing shell metacharacters, which are not properly escaped before being passed to shell command strings. Successful exploitation requires user interaction, where a user or automated workflow invokes rpmuncompress on the malicious file, leading to high impact on the confidentiality, integrity, and availability of data accessible to the invoking user.

References

Affected packages

Ubuntu:22.04:LTS
rpm

Package

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

Affected ranges

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

Affected versions

4.*
4.16.1.2+dfsg1-3ubuntu1
4.16.1.2+dfsg1-3ubuntu3
4.17.0+dfsg1-1
4.17.0+dfsg1-3
4.17.0+dfsg1-4
4.17.0+dfsg1-4build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "librpm9",
            "binary_version": "4.17.0+dfsg1-4build1"
        },
        {
            "binary_name": "librpmbuild9",
            "binary_version": "4.17.0+dfsg1-4build1"
        },
        {
            "binary_name": "librpmio9",
            "binary_version": "4.17.0+dfsg1-4build1"
        },
        {
            "binary_name": "librpmsign9",
            "binary_version": "4.17.0+dfsg1-4build1"
        },
        {
            "binary_name": "python3-rpm",
            "binary_version": "4.17.0+dfsg1-4build1"
        },
        {
            "binary_name": "rpm",
            "binary_version": "4.17.0+dfsg1-4build1"
        },
        {
            "binary_name": "rpm-common",
            "binary_version": "4.17.0+dfsg1-4build1"
        },
        {
            "binary_name": "rpm-i18n",
            "binary_version": "4.17.0+dfsg1-4build1"
        },
        {
            "binary_name": "rpm2cpio",
            "binary_version": "4.17.0+dfsg1-4build1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-84838.json"
Ubuntu:24.04:LTS
rpm

Package

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

Affected ranges

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

Affected versions

4.*
4.18.0+dfsg-1build1
4.18.0+dfsg-1build2
4.18.2+dfsg-1
4.18.2+dfsg-2
4.18.2+dfsg-2.1build1
4.18.2+dfsg-2.1build2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "librpm9t64",
            "binary_version": "4.18.2+dfsg-2.1build2"
        },
        {
            "binary_name": "librpmbuild9t64",
            "binary_version": "4.18.2+dfsg-2.1build2"
        },
        {
            "binary_name": "librpmio9t64",
            "binary_version": "4.18.2+dfsg-2.1build2"
        },
        {
            "binary_name": "librpmsign9t64",
            "binary_version": "4.18.2+dfsg-2.1build2"
        },
        {
            "binary_name": "python3-rpm",
            "binary_version": "4.18.2+dfsg-2.1build2"
        },
        {
            "binary_name": "rpm",
            "binary_version": "4.18.2+dfsg-2.1build2"
        },
        {
            "binary_name": "rpm-common",
            "binary_version": "4.18.2+dfsg-2.1build2"
        },
        {
            "binary_name": "rpm-i18n",
            "binary_version": "4.18.2+dfsg-2.1build2"
        },
        {
            "binary_name": "rpm2cpio",
            "binary_version": "4.18.2+dfsg-2.1build2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-84838.json"
Ubuntu:26.04:LTS
rpm

Package

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

Affected ranges

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

Affected versions

4.*
4.20.1+dfsg-3
6.*
6.0.0-2
6.0.1-1
6.0.1-1build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "librpm10",
            "binary_version": "6.0.1-1build1"
        },
        {
            "binary_name": "librpmbuild10",
            "binary_version": "6.0.1-1build1"
        },
        {
            "binary_name": "librpmio10",
            "binary_version": "6.0.1-1build1"
        },
        {
            "binary_name": "librpmsign10",
            "binary_version": "6.0.1-1build1"
        },
        {
            "binary_name": "python3-rpm",
            "binary_version": "6.0.1-1build1"
        },
        {
            "binary_name": "rpm",
            "binary_version": "6.0.1-1build1"
        },
        {
            "binary_name": "rpm-common",
            "binary_version": "6.0.1-1build1"
        },
        {
            "binary_name": "rpm2cpio",
            "binary_version": "6.0.1-1build1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-84838.json"
Ubuntu:Pro:14.04:LTS
rpm

Package

Name
rpm
Purl
pkg:deb/ubuntu/rpm?arch=source&distro=trusty%2Fesm

Affected ranges

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

Affected versions

4.*
4.11.1-2
4.11.1-3
4.11.1-3ubuntu0.1
4.11.1-3ubuntu0.1+esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "debugedit",
            "binary_version": "4.11.1-3ubuntu0.1+esm1"
        },
        {
            "binary_name": "librpm3",
            "binary_version": "4.11.1-3ubuntu0.1+esm1"
        },
        {
            "binary_name": "librpmbuild3",
            "binary_version": "4.11.1-3ubuntu0.1+esm1"
        },
        {
            "binary_name": "librpmio3",
            "binary_version": "4.11.1-3ubuntu0.1+esm1"
        },
        {
            "binary_name": "librpmsign1",
            "binary_version": "4.11.1-3ubuntu0.1+esm1"
        },
        {
            "binary_name": "python-rpm",
            "binary_version": "4.11.1-3ubuntu0.1+esm1"
        },
        {
            "binary_name": "rpm",
            "binary_version": "4.11.1-3ubuntu0.1+esm1"
        },
        {
            "binary_name": "rpm-common",
            "binary_version": "4.11.1-3ubuntu0.1+esm1"
        },
        {
            "binary_name": "rpm-i18n",
            "binary_version": "4.11.1-3ubuntu0.1+esm1"
        },
        {
            "binary_name": "rpm2cpio",
            "binary_version": "4.11.1-3ubuntu0.1+esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-84838.json"
Ubuntu:Pro:16.04:LTS
rpm

Package

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

Affected ranges

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

Affected versions

4.*
4.12.0.1+dfsg1-3build2
4.12.0.1+dfsg1-3build3
4.12.0.1+dfsg1-3ubuntu0.1~esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "debugedit",
            "binary_version": "4.12.0.1+dfsg1-3ubuntu0.1~esm1"
        },
        {
            "binary_name": "librpm3",
            "binary_version": "4.12.0.1+dfsg1-3ubuntu0.1~esm1"
        },
        {
            "binary_name": "librpmbuild3",
            "binary_version": "4.12.0.1+dfsg1-3ubuntu0.1~esm1"
        },
        {
            "binary_name": "librpmio3",
            "binary_version": "4.12.0.1+dfsg1-3ubuntu0.1~esm1"
        },
        {
            "binary_name": "librpmsign3",
            "binary_version": "4.12.0.1+dfsg1-3ubuntu0.1~esm1"
        },
        {
            "binary_name": "python-rpm",
            "binary_version": "4.12.0.1+dfsg1-3ubuntu0.1~esm1"
        },
        {
            "binary_name": "python3-rpm",
            "binary_version": "4.12.0.1+dfsg1-3ubuntu0.1~esm1"
        },
        {
            "binary_name": "rpm",
            "binary_version": "4.12.0.1+dfsg1-3ubuntu0.1~esm1"
        },
        {
            "binary_name": "rpm-common",
            "binary_version": "4.12.0.1+dfsg1-3ubuntu0.1~esm1"
        },
        {
            "binary_name": "rpm-i18n",
            "binary_version": "4.12.0.1+dfsg1-3ubuntu0.1~esm1"
        },
        {
            "binary_name": "rpm2cpio",
            "binary_version": "4.12.0.1+dfsg1-3ubuntu0.1~esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-84838.json"
Ubuntu:Pro:18.04:LTS
rpm

Package

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

Affected ranges

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

Affected versions

4.*
4.12.0.2+dfsg1-2build2
4.14.0+dfsg1-2
4.14.1+dfsg1-2
4.14.1+dfsg1-2ubuntu0.1~esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "debugedit",
            "binary_version": "4.14.1+dfsg1-2ubuntu0.1~esm1"
        },
        {
            "binary_name": "librpm8",
            "binary_version": "4.14.1+dfsg1-2ubuntu0.1~esm1"
        },
        {
            "binary_name": "librpmbuild8",
            "binary_version": "4.14.1+dfsg1-2ubuntu0.1~esm1"
        },
        {
            "binary_name": "librpmio8",
            "binary_version": "4.14.1+dfsg1-2ubuntu0.1~esm1"
        },
        {
            "binary_name": "librpmsign8",
            "binary_version": "4.14.1+dfsg1-2ubuntu0.1~esm1"
        },
        {
            "binary_name": "python-rpm",
            "binary_version": "4.14.1+dfsg1-2ubuntu0.1~esm1"
        },
        {
            "binary_name": "python3-rpm",
            "binary_version": "4.14.1+dfsg1-2ubuntu0.1~esm1"
        },
        {
            "binary_name": "rpm",
            "binary_version": "4.14.1+dfsg1-2ubuntu0.1~esm1"
        },
        {
            "binary_name": "rpm-common",
            "binary_version": "4.14.1+dfsg1-2ubuntu0.1~esm1"
        },
        {
            "binary_name": "rpm-i18n",
            "binary_version": "4.14.1+dfsg1-2ubuntu0.1~esm1"
        },
        {
            "binary_name": "rpm2cpio",
            "binary_version": "4.14.1+dfsg1-2ubuntu0.1~esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-84838.json"
Ubuntu:Pro:20.04:LTS
rpm

Package

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

Affected ranges

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

Affected versions

4.*
4.14.2.1+dfsg1-1
4.14.2.1+dfsg1-1build1
4.14.2.1+dfsg1-1build2
4.14.2.1+dfsg1-1ubuntu0.1~esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "debugedit",
            "binary_version": "4.14.2.1+dfsg1-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "librpm8",
            "binary_version": "4.14.2.1+dfsg1-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "librpmbuild8",
            "binary_version": "4.14.2.1+dfsg1-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "librpmio8",
            "binary_version": "4.14.2.1+dfsg1-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "librpmsign8",
            "binary_version": "4.14.2.1+dfsg1-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "python-rpm",
            "binary_version": "4.14.2.1+dfsg1-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "python3-rpm",
            "binary_version": "4.14.2.1+dfsg1-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "rpm",
            "binary_version": "4.14.2.1+dfsg1-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "rpm-common",
            "binary_version": "4.14.2.1+dfsg1-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "rpm-i18n",
            "binary_version": "4.14.2.1+dfsg1-1ubuntu0.1~esm1"
        },
        {
            "binary_name": "rpm2cpio",
            "binary_version": "4.14.2.1+dfsg1-1ubuntu0.1~esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-84838.json"