CVE-2026-115501
IBM i is Affected By A Buffer Overflow Vulnerability in QFileSvr.400 File System []
- Medium 5.3
Description
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.
Key facts
- Published
- 13 Nov 2026
- Last changed
- 13 Nov 2026
- Assigned by
- ibm
- EPSS
- 0.123% likely to be exploited in the next 30 days, higher than 2.137% of CVEs (scores for 15 Nov 2026)
- SSVC (CISA)
- Exploitation: none; Automatable: no; Technical impact: partial
Severity scores
Each score is shown as its source gave it. They are not averaged or merged.
- 5.3CVSS 3.1, Mediumfrom the CNA (ibm)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
What to do
- 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.CNA solution statement
Historical context and remediation
This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.
No separately sourced impact summary is available on this page yet. Consult the description, version data and dated exploitation evidence.
Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.
Affected products
| Vendor | Product | Versions |
|---|---|---|
| IBM | i |
|
Timeline
- 13 Nov 2026 Published