EUVD-2026-62722
GHSA-cpmx-x7w2-qmhv
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Description states denial of service only, so C:N/I:N with A:H; network-reachable, unauthenticated, low-complexity per the stated vector gives AV:N/AC:L/PR:N/UI:N.
Primary rating from Vendor (ibm).
CVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Lifecycle Timeline
2DescriptionNVD
IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 could allow a remote attacker to cause a denial of service due to an integer underflow.
AnalysisAI
Denial of service in IBM AIX 7.2/7.3 and IBM PowerVM VIOS 4.1 lets a remote attacker crash or hang the affected system by triggering an integer underflow (CWE-190) in a network-reachable component. The flaw was reported by IBM, which has released a fix; no public exploit code has been identified at time of analysis and it is not listed in CISA KEV. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Per the provided CVSS vector (AV:N/AC:L/PR:N/UI:N), exploitation requires only network reachability to the affected AIX 7.2/7.3 or PowerVM VIOS 4.1 service, with no authentication and no user interaction against default configurations. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The signals here are mixed and warrant scrutiny rather than automatic crisis response. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker with network access to an exposed AIX or VIOS host sends a crafted request to the vulnerable network-facing service, causing a subtraction to underflow and wrap, which corrupts a size/length calculation and crashes or hangs the affected process or kernel path. Given the stated AV:N/AC:L/PR:N vector, this requires no authentication and low complexity; however, no public POC is referenced, so exploitation would require the attacker to independently identify the affected code path. |
| Remediation | Patch available per vendor advisory: apply the fix referenced in IBM's advisory at https://www.ibm.com/support/pages/node/7283858, which corresponds to the appropriate iFix/APAR or Technology Level/Service Pack for AIX 7.2, AIX 7.3, and PowerVM VIOS 4.1 (the exact patched build numbers are not enumerated in the provided data and should be read directly from that page). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify and catalog all systems running IBM AIX 7.2/7.3 or PowerVM VIOS 4.1; assess their criticality and network exposure to prioritize patching. …
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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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