UBUNTU-CVE-2026-95508

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Source
https://ubuntu.com/security/CVE-2026-95508
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-95508.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-95508
Upstream
  • CVE-2026-95508
Published
2026-09-22T09:17:00Z
Modified
2026-09-24T02:03:14Z
Severity
  • 7.4 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:H CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

A heap-based buffer overflow was found in the DHCPv6 and TFTP response builders of libslirp. When the host is configured with a small interface MTU, a guest-supplied DHCPv6 CLIENTID option or TFTP blksize option can overflow the reply buffer with attacker-controlled content and length, resulting in denial of service and potentially arbitrary code execution in the host process. The default interface MTU is not affected.

References

Affected packages

Ubuntu:20.04:LTS / libslirp

Package

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

Affected ranges

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

Affected versions

4.*
4.0.0-1
4.0.0-2
4.1.0-1
4.1.0-2
4.1.0-2ubuntu1
4.1.0-2ubuntu2
4.1.0-2ubuntu2.1
4.1.0-2ubuntu2.2

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "libslirp0",
            "binary_version":  "4.1.0-2ubuntu2.2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-95508.json"

Ubuntu:22.04:LTS / libslirp

Package

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

Affected ranges

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

Affected versions

4.*
4.4.0-1build1
4.6.1-1
4.6.1-1build1
4.6.1-1ubuntu0.2

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "libslirp0",
            "binary_version":  "4.6.1-1ubuntu0.2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-95508.json"

Ubuntu:24.04:LTS / libslirp

Package

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

Affected ranges

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

Affected versions

4.*
4.7.0-1ubuntu1
4.7.0-1ubuntu2
4.7.0-1ubuntu3
4.7.0-1ubuntu3.1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "libslirp0",
            "binary_version":  "4.7.0-1ubuntu3.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-95508.json"

Ubuntu:26.04:LTS / libslirp

Package

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

Affected ranges

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

Affected versions

4.*
4.8.0-1ubuntu1
4.9.1-1ubuntu1
4.9.1-1ubuntu1.1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "libslirp0",
            "binary_version":  "4.9.1-1ubuntu1.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-95508.json"