CVE-2026-17270: CWE-121 Stack-based Buffer Overflow
Description
IBM i 7.6, 7.5, 7.4, and 7.3 could allow a local attacker to cause a denial of service due to a stack-based buffer overflow.
CVSS v3.1
Score 4.3medium
Affected software
IBM
cpe:2.3:a:ibm:i:7.6:*:*:*:*:*:*:*cpe:2.3:a:ibm:i:7.6.0:*:*:*:*:*:*:*cpe:2.3:a:ibm:i:7.5:*:*:*:*:*:*:*cpe:2.3:a:ibm:i:7.5.0:*:*:*:*:*:*:*cpe:2.3:a:ibm:i:7.4:*:*:*:*:*:*:*cpe:2.3:a:ibm:i:7.4.0:*:*:*:*:*:*:*Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
IBM i versions 7.3 through 7.6 contain a stack-based buffer overflow vulnerability (CWE-121) that can be exploited by a local attacker to cause a denial of service. The vulnerability arises from improper handling of data on the stack, leading to potential memory corruption. The CVSS 3.1 base score is 4.3, reflecting a medium severity with network attack vector, low attack complexity, and requiring local privileges. There is no indication of confidentiality or integrity impact, only availability.
Potential Impact
The vulnerability allows a local attacker to cause a denial of service, potentially crashing affected IBM i systems. There is no reported impact on data confidentiality or integrity. No known exploits are currently in the wild.
Mitigation Recommendations
No vendor advisory or patch information is provided. Patch status is not yet confirmed — check the IBM vendor advisory for current remediation guidance. Until a patch is available, restrict local access to trusted users only to reduce risk.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- ibm
- Date Reserved
- 2026-07-24T23:19:32.306Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a9af761acd9273b49e77895
Added to database: 09/04/2026, 16:52:49 UTC
Last enriched: 09/14/2026, 23:51:45 UTC
Last updated: 10/19/2026, 18:48:18 UTC
Views: 107
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