Stack Buffer Overflow in IBM i File System
CVE-2026-115501

5.3MEDIUM

Key Information:

Vendor

IBM
Status
I
Vendor
CVE Published:
13 November 2026

What is CVE-2026-115501?

IBM i versions 7.3, 7.4, 7.5, and 7.6 exhibit a stack buffer overflow vulnerability due to improper bounds checking in the QFileSvr.400 file system. A local authenticated attacker can exploit this flaw by issuing specific commands, potentially resulting in undefined behavior. This vulnerability highlights the importance of securing file systems against unauthorized modifications and attacks.

Affected Version(s)

i 7.6

i 7.5

i 7.4

References

https://www.ibm.com/support/pages/node/7296188
vendor-advisorypatch

CVSS V3.1

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.