Skip to main content

open-iscsi CVE-2026-18728

| EUVDEUVD-2026-57715 MEDIUM
Integer Underflow (CWE-191)
2026-08-13 redhat GHSA-v5q9-q65g-v5rv
Integer Overflow Buffer Overflow Denial Of Service Red Hat Enterprise Linux 10 Red Hat Enterprise Linux 9
6.5
CVSS 3.1 · Vendor: redhat
Share

Severity by source

Vendor (redhat) PRIMARY
6.5 MEDIUM
AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
vuln.today AI
6.5 MEDIUM

Adjacent-network vector only (AV:A), no privileges or interaction required; impact is a process crash with no confidentiality or integrity consequence.

3.1 AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
4.0 AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
SUSE
5.3 MEDIUM
AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Red Hat
6.5 MEDIUM
qualitative

Primary rating from Vendor (redhat).

CVSS VectorVendor: redhat

Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Lifecycle Timeline

2
Analysis Generated
Aug 13, 2026 - 03:59 vuln.today
CVE Published
Aug 13, 2026 - 03:13 cve.org
MEDIUM 6.5

DescriptionCVE.org

A flaw was found in open-iscsi. An integer underflow vulnerability in the iscsiuio component, specifically during IPv4 Dynamic Host Configuration Protocol (DHCP) parsing, allows a remote attacker on the same local network segment to cause a denial of service. By sending a specially crafted IPv4/UDP DHCP reply, the attacker can trigger an out-of-bounds read, leading to the iscsiuio process crashing. This issue affects systems where iscsiuio is actively handling IPv4 DHCP traffic.

AnalysisAI

The iscsiuio DHCP parser in open-iscsi crashes when processing maliciously crafted DHCP reply packets, disrupting iSCSI storage connectivity or network boot on affected hosts. An integer underflow (CWE-191) in the IPv4/UDP DHCP reply parsing path triggers an out-of-bounds read, causing the iscsiuio process to terminate; impact is limited to availability with no confidentiality or integrity exposure. …

Unlock full vulnerability intelligence

  • Risk assessment & exploitation conditions
  • Attack chain visualization
  • Remediation with exact patch versions
  • Threat intelligence from 22 sources
  • Personal watchlist & email alerts
Continue with Google Continue with GitHub

Free forever · No credit card required

Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
technique details hidden
Delivery
technique details hidden
Exploit
technique details hidden
Execution
technique details hidden
Persist
technique details hidden
Impact
technique details hidden
Sign in to reveal

Vulnerability AssessmentAI

Exploitation Exploitation requires the attacker to be present on the same Layer-2 local network segment as the target host (AV:A - adjacent network; internet-sourced exploitation is not possible). … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 3.1 vector (AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H, score 6.5) accurately captures the key risk dimensions: the attack is constrained to adjacent-network segments, requires no authentication or user interaction, and produces a high availability impact with no confidentiality or integrity consequence. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Apply the Red Hat-provided errata update for the open-iscsi package on affected RHEL 9 and RHEL 10 systems as soon as it is published; monitor the vendor advisory at https://access.redhat.com/security/cve/CVE-2026-18728 for the patched package version, which is not yet confirmed in the current data set. … Detailed patch versions, workarounds, and compensating controls in full report.
Sign in to read full assessment

Threat intelligence, references, and detailed analysis are available after sign-in.

More in Red Hat Enterprise Linux 10

View all
CVE-2026-18663 MEDIUM
5.9 Aug 12

Heap corruption via double-free in 389-ds-base's LDAP control parsing allows an unauthenticated remote attacker to crash
CVE-2026-4631 CRITICAL POC
9.8 Apr 07

Remote code execution in Cockpit's web interface allows unauthenticated attackers to execute arbitrary commands on the h
CVE-2026-4480 CRITICAL POC
9.0 May 26

Remote code execution in Samba's printing subsystem allows remote attackers to inject arbitrary shell commands via craft
CVE-2026-14544 CRITICAL
9.8 Jul 03

Remote code execution and privilege escalation in HPLIP (HP Linux Imaging and Printing) affects the hpcups print filter

CVE-2026-28369 CRITICAL
9.1 Mar 27

HTTP request smuggling in Undertow (the embedded web server underpinning JBoss EAP, Red Hat Data Grid, and Apache Camel

CVE-2026-28368 CRITICAL
9.1 Mar 27

HTTP request smuggling in Red Hat Undertow allows remote unauthenticated attackers to bypass front-end security controls
CVE-2026-33845 CRITICAL
9.1 Apr 30

Out-of-bounds read in the GnuTLS DTLS handshake reassembly logic lets remote unauthenticated attackers trigger an intege
CVE-2026-28367 CRITICAL
9.1 Mar 27

HTTP request smuggling in Undertow allows remote unauthenticated attackers to send `\r\r\r` as a header block terminator
CVE-2026-16526 HIGH
8.8 Jul 30

Local privilege escalation in Performance Co-Pilot (PCP) on Red Hat Enterprise Linux 6 through 10 and OpenShift Containe
CVE-2026-11610 HIGH
8.8 Jul 07

Denial of service in Red Hat / 389 Directory Server (389-ds-base, versions since ~1.3.2/2013) allows an authenticated LD
CVE-2026-14474 HIGH
8.8 Jul 07

Local-to-domain-wide root privilege escalation in SSSD's LDAP sudo provider allows an authenticated LDAP directory user

CVE-2026-52720 HIGH
8.8 Jun 15

Heap buffer overflow in GStreamer's librfb (RFB/VNC client) allows a malicious VNC server to corrupt heap memory on a co

Same weakness CWE-191 – Integer Underflow

View all
CVE-2014-0497 CRITICAL POC
9.8
CVE-2015-5212 MEDIUM
6.8
CVE-2017-14496 HIGH POC
7.5
CVE-2014-8768 MEDIUM POC
5.0
CVE-2017-11757 CRITICAL POC
9.8
CVE-2024-23313 CRITICAL POC
9.8
CVE-2021-3323 CRITICAL POC
9.8
CVE-2021-21811 CRITICAL POC
9.8

Same technique Integer Overflow

View all
CVE-2014-0497 CRITICAL POC
9.8
CVE-2013-2729 CRITICAL POC
9.8
CVE-2015-8651 HIGH
8.8
CVE-2012-5054 HIGH POC
8.8
CVE-2014-0569 CRITICAL POC
9.3
CVE-2023-21716 CRITICAL POC
9.8
CVE-2017-3599 HIGH POC
7.5
CVE-2017-7529 HIGH
7.5

Vendor StatusVendor

SUSE

Severity: Moderate
Product Status
SLES15-SP5-CHOST-BYOS-SAP-CCloud Affected
SLES15-SP6-CHOST-BYOS Affected
SLES15-SP6-CHOST-BYOS-Aliyun Affected
SLES15-SP6-CHOST-BYOS-Azure Affected
SLES15-SP6-CHOST-BYOS-EC2 Affected

Share

CVE-2026-18728 vulnerability details – vuln.today
Back

This site uses cookies essential for authentication and security. No tracking or analytics cookies are used. Privacy Policy