UBUNTU-CVE-2026-81885

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Source
https://ubuntu.com/security/CVE-2026-81885
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-81885.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-81885
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 NE relocation fixup-chain parser was vulnerable because the NE relocation parser followed fixup chains without an active iteration limit or cycle detection. The vulnerability is triggered by opening a crafted NE executable whose in-bounds relocation entry points back to itself instead of reaching 0xffff. The parser repeatedly processed the same relocation and allocated another relocation object on each iteration. This can cause denial of service through continuous CPU and memory consumption. 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-2026-81885.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-2026-81885.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-2026-81885.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-2026-81885.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-2026-81885.json"