EUVD-2026-63738
GHSA-cjp4-x5rh-9pqj
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Remote unauthenticated low-complexity trigger justifies AV:N/AC:L/PR:N; DoS gives A:H, but the description's tentative 'potentially disclose' supports C:L rather than C:H, with no integrity impact.
Primary rating from Vendor (us).
CVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Lifecycle Timeline
6DescriptionNVD
IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a remote attacker to cause a denial of service and potentially disclose sensitive information due to an integer underflow.
AnalysisAI
Remote denial-of-service and potential information disclosure in IBM AIX 7.2/7.3 and PowerVM VIOS 4.1 arises from an integer underflow (CWE-190 class) reachable over the network without authentication. An unauthenticated remote attacker can send crafted input that triggers the arithmetic wraparound, crashing an affected service and possibly reading sensitive memory contents. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Per the CVSS vector (AV:N/AC:L/PR:N/UI:N), no authentication or user interaction is required and exploitation is remote against the affected service - the limiting factor is network reachability of the vulnerable AIX 7.2/7.3 or VIOS 4.1 service, which in well-segmented Power environments is typically confined to a management network. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The signals are mixed. … 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 | Apply the fixes described in IBM's advisory at https://www.ibm.com/support/pages/node/7283858; the provided data confirms a patch is available per vendor advisory but does not include an exact fixed version/technology level, so obtain the specific APAR/ifix or TL/SP levels for AIX 7.2, AIX 7.3, and VIOS 4.1 directly from that IBM support page (do not rely on an assumed version number). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all IBM AIX 7.2/7.3 and PowerVM VIOS 4.1 systems, document their network accessibility, and identify which systems are production-critical. …
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Remote code execution in IBM AIX 7.2 and 7.3 (and IBM PowerVM VIOS 4.1) stems from a stack-based buffer overflow that le
Remote code execution in IBM AIX 7.2/7.3 and PowerVM VIOS 4.1 stems from a buffer overflow (out-of-bounds write) that a
Remote code execution in IBM AIX 7.2/7.3 and PowerVM VIOS 4.1 stems from a buffer overflow (out-of-bounds write) that a
Remote code execution in IBM AIX 7.2 and 7.3, and IBM PowerVM VIOS 4.1, stems from a stack-based buffer overflow (CWE-78
Same weakness CWE-190 – Integer Overflow or Wraparound
View allSame technique Integer Overflow
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External POC / Exploit Code
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