IBM i is Affected By Multiple Vulnerabilities in Host Servers
Summary
| CVE | CVE-2026-18846 |
|---|---|
| State | PUBLISHED |
| Assigner | ibm |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-08-13 20:17:19 UTC |
| Updated | 2026-08-17 15:28:53 UTC |
| Description | IBM i 7.6, 7.5, 7.4, and 7.3 s vulnerable to a buffer overflow from improperly validating client data. By sending malformed requests to one of the host servers, a remote attacker could leverage this vulnerability to cause a denial-of-server (DoS) for that server. |
Risk And Classification
Primary CVSS: v3.1 7.5 HIGH from [email protected]
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS: 0.003920000 probability, percentile 0.323690000 (date 2026-08-17)
Problem Types: CWE-787 | CWE-787 CWE-787 Out-of-bounds Write
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Primary | 7.5 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| 3.1 | CNA | CVSS | 7.5 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
CVSS v3.1 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD Known Affected Configurations (CPE 2.3)
Vendor Declared Affected Products
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| www.ibm.com/support/pages/node/7283578 | [email protected] | www.ibm.com | Vendor Advisory |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Additional Advisory Data
Solutions
CNA: IBM strongly recommends addressing the vulnerability now. Host Servers IBM i Release5770-SS1 PTF Number(s)PTF Download Link(s)7.6SJ11101 SJ11097 https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11101 https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11097 7.5SJ11102 SJ11098 https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11102 https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11098 7.4SJ11103 SJ11099 https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11103 https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11099 7.3SJ11104 SJ11100 https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11100 Debug Server IBM i Release5770-SS1 PTF Number(s)PTF Download Link(s)7.6SJ10899 https://www.ibm.com/mysupport/s/fix-information?legacy=SJ10899 Telnet IBM i Release5770-SS1 PTF Number(s)PTF Download Link(s)7.6SJ11022 https://www.ibm.com/mysupport/s/fix-information?legacy=SJ11022 DRDA/DDM IBM i Release5770-SS1 PTF Number(s)PTF Download Link(s)7.6SJ10848 https://www.ibm.com/mysupport/s/fix-information?legacy=SJ10848 IBM recommends users running unsupported versions of affected products upgrade to a supported and fixed version of affected products.