UBUNTU-CVE-2026-121944

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Source
https://ubuntu.com/security/CVE-2026-121944
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-121944.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-121944
Upstream
Published
2026-11-04T00:00:00Z
Modified
2026-11-05T11:46:32Z
Severity
  • 6.8 (Medium) CVSS_V4 - CVSS:4.0/AV:L/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

sngrep through 1.9.0 contains an infinite loop vulnerability in capture_packet_reasm_ip() in src/capture.c that allows attackers to cause denial of service via crafted NFLOG TLVs. Attackers can supply a pcap file with link type NFLOG containing a non-payload TLV with length under 4, making the capture thread spin at full CPU and stop processing packets.

References

Affected packages

Ubuntu:16.04:LTS
sngrep

Package

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

Affected ranges

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

Affected versions

0.*
0.4.1-1
1.*
1.0.0-1
1.1.0-1
1.2.0-1
1.2.0-1build1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "sngrep",
            "binary_version": "1.2.0-1build1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-121944.json"
Ubuntu:18.04:LTS
sngrep

Package

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

Affected ranges

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

Affected versions

1.*
1.4.3-1
1.4.4-1
1.4.4-2
1.4.5-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "sngrep",
            "binary_version": "1.4.5-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-121944.json"
Ubuntu:20.04:LTS
sngrep

Package

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

Affected ranges

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

Affected versions

1.*
1.4.6-1
1.4.6-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "sngrep",
            "binary_version": "1.4.6-2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-121944.json"
Ubuntu:22.04:LTS
sngrep

Package

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

Affected ranges

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

Affected versions

1.*
1.4.9-1
1.4.10-1
1.4.10-1ubuntu0.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "sngrep",
            "binary_version": "1.4.10-1ubuntu0.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-121944.json"
Ubuntu:24.04:LTS
sngrep

Package

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

Affected ranges

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

Affected versions

1.*
1.7.0-2
1.8.0-1
1.8.0-1build1
1.8.0-1build2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "sngrep",
            "binary_version": "1.8.0-1build2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-121944.json"
Ubuntu:26.04:LTS
sngrep

Package

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

Affected ranges

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

Affected versions

1.*
1.8.2-1
1.8.3-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "sngrep",
            "binary_version": "1.8.3-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-121944.json"
Ubuntu:26.10
sngrep

Package

Name
sngrep
Purl
pkg:deb/ubuntu/sngrep?arch=source&distro=stonking

Affected ranges

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

Affected versions

1.*
1.8.3-1
1.8.4-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "sngrep",
            "binary_version": "1.8.4-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-121944.json"