DEBIAN-CVE-2026-18727

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Source
https://security-tracker.debian.org/tracker/CVE-2026-18727
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-18727.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-18727
Upstream
  • CVE-2026-18727
Published
2026-08-12T22:17:14Z
Modified
2026-09-14T17:02:38Z
Severity
  • 6.5 (Medium) CVSS_V3 - CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
Details

A flaw was found in open-iscsi's iscsiuio component. This vulnerability involves an integer underflow and out-of-bounds read during Dynamic Host Configuration Protocol for IPv6 (DHCPv6) packet parsing. Specifically, crafted DHCPv6 Advertise traffic with a short User Datagram Protocol (UDP) length can cause the DHCPv6 payload length to underflow. An unauthenticated attacker on an adjacent network segment can exploit this by sending specially crafted IPv6 UDP traffic while the client is in an active DHCPv6 exchange, leading to a denial of service due to a process crash or service disruption.

References

Affected packages

Debian:12 / open-iscsi

Package

Name
open-iscsi
Purl
pkg:deb/debian/open-iscsi?arch=source&distro=bookworm

Affected ranges

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

Affected versions

2.*
2.1.8-1
2.1.8-2
2.1.9-1
2.1.9-2
2.1.9-3
2.1.9-4
2.1.10-1
2.1.10-2
2.1.10-3
2.1.11-1
2.1.11-2
2.1.11-3
2.1.11-4
2.1.11-5
2.1.11-6
2.1.12-1
2.1.12-2
2.1.13-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-18727.json"

Debian:13 / open-iscsi

Package

Name
open-iscsi
Purl
pkg:deb/debian/open-iscsi?arch=source&distro=trixie

Affected ranges

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

Affected versions

2.*
2.1.11-1
2.1.11-1+deb13u1
2.1.11-1+deb13u2
2.1.11-2
2.1.11-3
2.1.11-4
2.1.11-5
2.1.11-6
2.1.12-1
2.1.12-2
2.1.13-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-18727.json"

Debian:14 / open-iscsi

Package

Name
open-iscsi
Purl
pkg:deb/debian/open-iscsi?arch=source&distro=forky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
2.1.13-1

Affected versions

2.*
2.1.11-1
2.1.11-2
2.1.11-3
2.1.11-4
2.1.11-5
2.1.11-6
2.1.12-1
2.1.12-2

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-18727.json"