CVE-2026-17255 | BDVDB-2026-367921 Detail

IBMi

Description#

IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote attacker to cause a denial of service due to improper validation of the prefix length in ICMPv6 Router Advertisements.

Impact#

Per CVSS v3.1: confidentiality impact none, integrity impact none, availability impact low. Attack vector: adjacent.

Weaknesses#

CWE-787 Out-of-bounds Write

References#

https://www.ibm.com/support/pages/node/7286093

Exploit#

No public exploit known

History#

Version 12026-09-04Record published in the CVE List.
Version 22026-09-10Most recent update recorded in the CVE List.

Published

Published: 2026-09-04
Last modified: 2026-09-10

Vendor information

Vendor: IBM
Product: i

All IBM vulnerabilities

Score

4.3 Medium

EPSS

less than 1%, Very Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 50.6.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Memory Corruption

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
7.6
Fixed
Not stated
Vulnerable
7.5
Fixed
Not stated
Vulnerable
7.4
Fixed
Not stated
Vulnerable
7.3
Fixed
Not stated

Scoring System

CVSS v4.0

Not available

CVSS v3.1

4.3 Medium

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

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

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).