CVE-Katalog
CVE-2026-18727
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
- Schweregrad
- Medium · CVSS 6.5
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.19% · Oct 22, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | open-iscsi | sid | 2.1.13-1 | fixed |
| Debian | open-iscsi | forky | 2.1.13-1 | fixed |
| Debian | open-iscsi | trixie | 2.1.11-1+deb13u2 | vulnerable |
| Debian | open-iscsi | bookworm | 2.1.8-1 | vulnerable |
| Debian | open-iscsi | bookworm-security | 2.1.8-1+deb12u1 | fixed |
| Cpe | enterprise_linux | Not reported | Not reported | unknown |
| Opensuse | open-iscsi | tumbleweed | 2.1.13-114.1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | open-iscsi | source | sid | 2.1.13-1 | not yet assigned | Not reported | [1144935] |
| Debian | open-iscsi | source | forky | 2.1.13-1 | not yet assigned | Not reported | [1144935] |
| Debian | open-iscsi | source | trixie | (unfixed) | not yet assigned | Not reported | [1144935] |
| Debian | open-iscsi | source | bookworm | 2.1.8-1+deb12u1 | not yet assigned | Not reported | [1144935] |
| Opensuse | open-iscsi | rpm | tumbleweed | 2.1.13-114.1 | Not reported | OPENSUSE-SU-2026:12102-1 | Not reported |
Notes
[trixie] open-iscsi: Minor issue
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [iscsiuio]Betroffen
Quellpaket: [open-iscsi]
Details (2)
2.1.8-1· amd64 · bookwormBetroffen · Behoben:
2.1.8-1+deb12u1nvd · open-iscsi · debian · bookworm; nvd · open-iscsi · debian · 12
2.1.8-1· arm64 · bookwormBetroffen · Behoben:
2.1.8-1+deb12u1nvd · open-iscsi · debian · bookworm; nvd · open-iscsi · debian · 12
- [libopeniscsiusr]Betroffen
Quellpaket: [open-iscsi]
Details (2)
2.1.8-1· amd64 · bookwormBetroffen · Behoben:
2.1.8-1+deb12u1nvd · open-iscsi · debian · bookworm; nvd · open-iscsi · debian · 12
2.1.8-1· arm64 · bookwormBetroffen · Behoben:
2.1.8-1+deb12u1nvd · open-iscsi · debian · bookworm; nvd · open-iscsi · debian · 12
- [libopeniscsiusr-dev]Betroffen
Quellpaket: [open-iscsi]
Details (2)
2.1.8-1· all · bookwormBetroffen · Behoben:
2.1.8-1+deb12u1nvd · open-iscsi · debian · bookworm; nvd · open-iscsi · debian · 12
2.1.8-1· all · bookwormBetroffen · Behoben:
2.1.8-1+deb12u1nvd · open-iscsi · debian · bookworm; nvd · open-iscsi · debian · 12
- [open-iscsi]Betroffen
Details (2)
2.1.8-1· amd64 · bookwormBetroffen · Behoben:
2.1.8-1+deb12u1nvd · open-iscsi · debian · bookworm; nvd · open-iscsi · debian · 12
2.1.8-1· arm64 · bookwormBetroffen · Behoben:
2.1.8-1+deb12u1nvd · open-iscsi · debian · bookworm; nvd · open-iscsi · debian · 12
[Debian 13 (Trixie)]
- [iscsiuio]Betroffen
Quellpaket: [open-iscsi]
Details (2)
2.1.11-1+deb13u2· amd64 · trixieBetroffen
nvd · open-iscsi · debian · 13
2.1.11-1+deb13u2· arm64 · trixieBetroffen
nvd · open-iscsi · debian · 13
- [libopeniscsiusr]Betroffen
Quellpaket: [open-iscsi]
Details (2)
2.1.11-1+deb13u2· amd64 · trixieBetroffen
nvd · open-iscsi · debian · 13
2.1.11-1+deb13u2· arm64 · trixieBetroffen
nvd · open-iscsi · debian · 13
- [libopeniscsiusr-dev]Betroffen
Quellpaket: [open-iscsi]
Details (2)
2.1.11-1+deb13u2· all · trixieBetroffen
nvd · open-iscsi · debian · 13
2.1.11-1+deb13u2· all · trixieBetroffen
nvd · open-iscsi · debian · 13
- [open-iscsi]Betroffen
Details (2)
2.1.11-1+deb13u2· amd64 · trixieBetroffen
nvd · open-iscsi · debian · 13
2.1.11-1+deb13u2· arm64 · trixieBetroffen
nvd · open-iscsi · debian · 13
[openSUSE Tumbleweed]
- [open-iscsi]Betroffen
Quellpaket: [open-iscsi]
Details (1)
2.1.12-113.1· x86_64 · tumbleweedBetroffen · Behoben:
2.1.13-114.1nvd · open-iscsi · opensuse · tumbleweed
- [iscsiuio]Unbekannt
Quellpaket: [open-iscsi]
Details (1)
0.7.8.8-113.1· x86_64 · tumbleweedUnbekannt · Behoben:
2.1.13-114.1Version impact unknown
nvd · open-iscsi · opensuse · tumbleweed
- [libopeniscsiusr0]Unbekannt
Quellpaket: [open-iscsi]
Details (1)
0.2.0-113.1· x86_64 · tumbleweedUnbekannt · Behoben:
2.1.13-114.1Version impact unknown
nvd · open-iscsi · opensuse · tumbleweed
- [open-iscsi-devel]Unbekannt
Quellpaket: [open-iscsi]
Details (1)
2.1.12-113.1· x86_64 · tumbleweedUnbekannt · Behoben:
2.1.13-114.1Version impact unknown
nvd · open-iscsi · opensuse · tumbleweed
Beobachtet:
Referenzen
- [https://ftp.suse.com/pub/projects/security/csaf/opensuse-su-2026_12102-1.json]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-18727]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-18727]
- [https://osv.dev/vulnerability/openSUSE-SU-2026:12102-1]
- [https://security-tracker.debian.org/tracker/CVE-2026-18727]
[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [SUSE security advisories and VEX]