IBM i is Affected By A Buffer Overflow Vulnerability in QFileSvr.400 File System []

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-115501
StatePUBLISHED
Assigneribm
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-11-13 22:17:21 UTC
Updated2026-11-13 22:17:21 UTC
DescriptionIBM 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.

Risk And Classification

Primary CVSS: v3.1 5.3 MEDIUM from [email protected]

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

Problem Types: CWE-121 | CWE-121 CWE-121 Stack-based Buffer Overflow

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary5.3MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
3.1CNACVSS5.3MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

CVSS v3.1 Breakdown

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

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA IBM I affected 7.6 Not specified
CNA IBM I affected 7.5 Not specified
CNA IBM I affected 7.4 Not specified
CNA IBM I affected 7.3 Not specified

References

ReferenceSourceLinkTags
www.ibm.com/support/pages/node/7296188 [email protected] www.ibm.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Additional Advisory Data

Solutions

CNA: 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.

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