UBUNTU-CVE-2026-81878

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Source
https://ubuntu.com/security/CVE-2026-81878
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-81878.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-81878
Upstream
Published
2026-09-22T16:18:00Z
Modified
2026-09-24T02:00:14Z
Severity
  • 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

radare2 is a UNIX-like reverse engineering framework and command-line toolset. Prior to 6.2.0, radare2's CPython bytecode .pyc marshal parser was vulnerable because the CPython marshal readers accepted a 32-bit string length without rejecting values that overflow the size-plus-one allocation. The vulnerability is triggered by opening or inspecting a crafted .pyc file through r2 or rabin2. A length of 0xffffffff wrapped the allocation to zero before the common byte reader wrote attacker-controlled data and fill bytes beyond the heap allocation. This can cause heap memory corruption and denial of service; arbitrary code execution is possible but has not been demonstrated. This issue is fixed in version 6.2.0.

References

Affected packages

Ubuntu:16.04:LTS / radare2

Package

Name
radare2
Purl
pkg:deb/ubuntu/radare2?arch=source&distro=xenial

Affected ranges

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

Affected versions

0.*
0.9.6-3.1ubuntu1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "libradare2-0.9.6",
            "binary_version":  "0.9.6-3.1ubuntu1"
        },
        {
            "binary_name":  "libradare2-common",
            "binary_version":  "0.9.6-3.1ubuntu1"
        },
        {
            "binary_name":  "radare2",
            "binary_version":  "0.9.6-3.1ubuntu1"
        },
        {
            "binary_name":  "radare2-plugins",
            "binary_version":  "0.9.6-3.1ubuntu1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-81878.json"

Ubuntu:Pro:18.04:LTS / radare2

Package

Name
radare2
Purl
pkg:deb/ubuntu/radare2?arch=source&distro=esm-apps%2Fbionic

Affected ranges

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

Affected versions

1.*
1.6.0+dfsg-1
2.*
2.0.0+dfsg-1
2.1.0+dfsg-1
2.3.0+dfsg-1
2.3.0+dfsg-2
2.3.0+dfsg-2ubuntu0.1~esm1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "libradare2-2.3",
            "binary_version":  "2.3.0+dfsg-2ubuntu0.1~esm1"
        },
        {
            "binary_name":  "libradare2-common",
            "binary_version":  "2.3.0+dfsg-2ubuntu0.1~esm1"
        },
        {
            "binary_name":  "radare2",
            "binary_version":  "2.3.0+dfsg-2ubuntu0.1~esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-81878.json"

Ubuntu:Pro:20.04:LTS / radare2

Package

Name
radare2
Purl
pkg:deb/ubuntu/radare2?arch=source&distro=esm-apps%2Ffocal

Affected ranges

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

Affected versions

3.*
3.2.1+dfsg-5build1
4.*
4.0.0+dfsg-1
4.2.1+dfsg-1
4.2.1+dfsg-2
4.2.1+dfsg-2ubuntu0.1~esm1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "libradare2-4.2.1",
            "binary_version":  "4.2.1+dfsg-2ubuntu0.1~esm1"
        },
        {
            "binary_name":  "libradare2-common",
            "binary_version":  "4.2.1+dfsg-2ubuntu0.1~esm1"
        },
        {
            "binary_name":  "radare2",
            "binary_version":  "4.2.1+dfsg-2ubuntu0.1~esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-81878.json"

Ubuntu:Pro:24.04:LTS / radare2

Package

Name
radare2
Purl
pkg:deb/ubuntu/radare2?arch=source&distro=esm-apps%2Fnoble

Affected ranges

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

Affected versions

5.*
5.5.0+dfsg-1ubuntu1
5.5.0+dfsg-1.1ubuntu2
5.5.0+dfsg-1.1ubuntu3
5.5.0+dfsg-1.1ubuntu3+esm1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "libradare2-5.0.0t64",
            "binary_version":  "5.5.0+dfsg-1.1ubuntu3+esm1"
        },
        {
            "binary_name":  "libradare2-common",
            "binary_version":  "5.5.0+dfsg-1.1ubuntu3+esm1"
        },
        {
            "binary_name":  "radare2",
            "binary_version":  "5.5.0+dfsg-1.1ubuntu3+esm1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-81878.json"

Ubuntu:26.04:LTS / radare2

Package

Name
radare2
Purl
pkg:deb/ubuntu/radare2?arch=source&distro=resolute

Affected ranges

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

Affected versions

5.*
5.9.8+dfsg-2
6.*
6.0.4+dfsg-1
6.0.7+ds-1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "libradare2-6.0.0t64",
            "binary_version":  "6.0.7+ds-1"
        },
        {
            "binary_name":  "libradare2-common",
            "binary_version":  "6.0.7+ds-1"
        },
        {
            "binary_name":  "radare2",
            "binary_version":  "6.0.7+ds-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-81878.json"