EUVD-2026-62853
GHSA-3x6j-qqg9-972j
Severity by source
AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
Network vector and low-privilege authentication confirmed by description; AC:H reflects complex underflow triggering conditions; S:C reflects cross-component heap adjacency effect; no confidentiality or availability impact.
Primary rating from Vendor (ibm).
CVSS VectorNVD
Lifecycle Timeline
3DescriptionNVD
IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote authenticated attacker to overwrite adjacent memory due to an integer underflow during bounds checking.
AnalysisAI
Heap-based buffer overflow in IBM i 7.3 through 7.6 allows a remote, low-privileged authenticated attacker to overwrite adjacent memory regions by triggering an integer underflow in the bounds checking logic. The CVSS scope change (S:C) reflects that the overwrite can cross component boundaries, though direct impact is rated low integrity only with no confidentiality or availability consequence. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a valid authenticated session with at least low-privilege access to the IBM i system (PR:L per CVSS vector), which explicitly rules out unauthenticated remote exploitation. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS base score of 3.5 accurately represents a constrained real-world threat: network reachability (AV:N) is substantially offset by high attack complexity (AC:H) and a mandatory low-privilege authenticated session (PR:L). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | IBM has released a patch for this vulnerability, confirmed by the vendor advisory at https://www.ibm.com/support/pages/node/7283297. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-122 – Heap-based Buffer Overflow
View allSame technique Heap Overflow
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External POC / Exploit Code
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