CVE-2026-115501
IBM i is Affected By A Buffer Overflow Vulnerability in QFileSvr.400 File System []
IBM i 7.3 7.4, 7.5, and 7.6 is vulnerable to a stack buffer overflow, caused by improper bounds checking in the QFileSvr.400 file system. By sending a command in the QFileSvr.400 file system, a local authenticated attacker could cause undefined behavior.
Fixes and workarounds
Fix
IBM i Release5770-SS1 PTF Number(s)PTF Download Link(s)7.6SJ12288 https://www.ibm.com/mysupport/s/fix-information?legacy=SJ12288 7.5SJ12287 https://www.ibm.com/mysupport/s/fix-information?legacy=SJ12287 7.4SJ12286 https://www.ibm.com/mysupport/s/fix-information?legacy=SJ12286 7.3SJ12285 https://www.ibm.com/mysupport/s/fix-information?legacy=SJ12285 IBM recommends users running unsupported versions of affected products upgrade to a supported and fixed version of affected products.
Source: CNA: ibmFix
The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.
Source: CNA: ibmAffected products and versions
| Product | Versions | Authority |
|---|---|---|
| i IBM |
7.6 (affected) 7.5 (affected) 7.4 (affected) 7.3 (affected) |
CNA: ibm |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 3.1 / 5.3 medium |
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L | CNA: ibm |
Exploit evidence
No exploit evidence in collected sources. This is not proof of no exploitation.
References
- https://www.ibm.com/support/pages/node/7296188CNA: ibm · vendor-advisory, patch
For agents and automation
Read public disclosures for free as Markdown or JSON. Compatible browsers also expose native WebMCP tools to search disclosures, read this page, and discover API access.
Use the ontology-linked Cyber API with x402 pay per request, or a Y2 Pro or Elite API key with the intel:cyber scope.
Endpoints and access details
https://api.y2.dev/api/v2/cyber/cveshttps://api.y2.dev/api/v2/cyber/cves/{cveId}
A workspace owner or admin can create a Pro or Elite API key. Send Authorization: Bearer <Y2_API_KEY> from your trusted agent runtime.
For x402, omit Authorization and read the HTTP 402 payment challenge before signing a retry. Public browser tools do not make payments.