EUVD-2026-62748
GHSA-r7x9-3h4v-9mc9
Severity by source
AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Local access and low privileges required to trigger heap overflow; impact is availability-only crash with no data exposure or integrity modification.
Primary rating from Vendor (ibm).
CVSS VectorNVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Lifecycle Timeline
2DescriptionNVD
IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a local attacker to cause a denial of service due to a heap buffer overflow.
AnalysisAI
Heap buffer overflow in IBM AIX 7.2, 7.3 and PowerVM VIOS 4.1 enables a local low-privileged attacker to crash the system, resulting in a denial of service. The flaw is rooted in improper bounds checking during heap memory operations (CWE-787). …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | The CVSS vector confirms PR:L, meaning a local account with low (non-root) privileges is sufficient - no administrative rights are required. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 base score of 5.5 (Medium) is consistent with the attack vector breakdown: AV:L (local access required), AC:L (no special conditions), PR:L (low privilege sufficient), UI:N (no user interaction needed), S:U (no scope change), C:N/I:N/A:H (pure availability impact). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | A local user with a low-privilege shell account on an IBM AIX 7.3 or PowerVM VIOS 4.1 system crafts an input or invokes a system call that triggers the heap buffer overflow in the vulnerable component, corrupting heap memory and causing the kernel or VIOS process to crash. On a PowerVM VIOS host, this crash could disrupt I/O services for all hosted LPARs simultaneously, causing a multi-partition outage. … |
| Remediation | A vendor-released patch is available per IBM advisory at https://www.ibm.com/support/pages/node/7283858; administrators should consult that page for the exact fix version and applicable APARs. … Detailed patch versions, workarounds, and compensating controls in full report. |
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Same weakness CWE-787 – Out-of-bounds Write
View allSame technique Memory Corruption
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External POC / Exploit Code
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