Vulnerabilities in IBM AIX and PowerVM VIOS
IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 allows a remote unauthenticated attacker can send a crafted UDP packet to a reachable RPC service, resulting in complete system unavailability and requiring an LPAR restart.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for help- Published
- Aug 20, 2026
- Updated
- Aug 25, 2026
- EPSS
- 1.0% · 62th percentile
- CWE
- CWE-400
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Report tools
Action score
30
Monitor
Low priority for now.
- CVSS
- 30 / 40 · 7.5 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 1.0%
CISA SSVC decision
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
Vulnrichment: CISA's decision-tree inputs.
CNA vs NVD score
- NVD
- —
- CNA · ibm
- 7.5
- NVD has not scored this yet; the score shown is the CNA’s.
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
Affected systems
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- ibm aix7.2.5 and later · up to 7.2.5.212 inclusive
- ibm aix7.3.2 and later · up to 7.3.2.5 inclusive
- ibm aix7.3.3 and later · up to 7.3.3.2 inclusive
- ibm aix7.3.4 and later · up to 7.3.4.1 inclusive
- ibm vios4.1.1.0 and later · before 4.1.1.30
- ibm vios4.1.2.0 and later · before 4.1.2.20
- ibm vios4.1.0 and later · before 4.1.0.50
Versions reported by the vendor
Affected version ranges reported by the assigning authority (ibm). Independent of NVD's CPE analysis and usually ahead of it.
IBM AIX
- 7.2, 7.3affected
IBM PowerVM VIOS
- 4.1affected
Same product
ibm: all recordsOther highest-scoring records for the same primary product.
- CVE-2009-3699Stack-based buffer overflow in libcsa.a (aka the calendar daemon library) in IBM AIX 5.x through 5.3.10 and 6.x through 6.1.3, and VIOS 2.1 59Plan
- CVE-2026-19437Vulnerabilities in IBM AIX and PowerVM VIOS39Monitor
- CVE-2026-18835Vulnerabilities in IBM AIX and PowerVM VIOS39Monitor
- CVE-2026-18832Vulnerabilities in IBM AIX and PowerVM VIOS39Monitor
- CVE-2026-17436Vulnerabilities in IBM AIX and PowerVM VIOS39Monitor
- CVE-2026-17160Vulnerabilities in IBM AIX and PowerVM VIOS39Monitor
Remediation
Which version to upgrade to
Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.
No fix version is recorded for this entry. Check the references for vendor advisories.
Exploit status
No known public exploit
No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.
Research context
For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.
Timeline
From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.
No dated events beyond publication.
FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).
Patch and commit links
Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.
No commit or PR link among the references.
Credits
All researchersFinders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.
Variant candidates
Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.
- CVE-2026-171210 days apartVulnerabilities in IBM AIX and PowerVM VIOS30Monitor
- CVE-2026-166901 days apartVulnerabilities in IBM AIX and PowerVM VIOS30Monitor
- CVE-2026-168181 days apartVulnerabilities in IBM AIX and PowerVM VIOS30Monitor
- CVE-2026-169520 days apartVulnerabilities in IBM AIX and PowerVM VIOS22Monitor
- CVE-2026-188220 days apartVulnerabilities in IBM AIX and PowerVM VIOS22Monitor
- CVE-2026-196531 days apartVulnerabilities in IBM AIX and PowerVM VIOS22Monitor
Chain candidates
An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.
—
Bug bounty scope
The product’s vendor appears in a public program. Matched by name; verify the scope text in the program.
Technical details
Attack conditions
- Anyone who can reach it over the internet can trigger it.
- No account or password is required.
- No user action is required.
- No special conditions are required; it is repeatable.
If successful
- Confidentiality
- none
- Integrity
- none
- Availability
- high · the service can be disrupted
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- None
- Integrity impact
- None
- Availability impact
- High
Weakness class (CWE)
CWE-400 · Uncontrolled Resource ConsumptionCVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
nvd-secondary
Root cause
Code that parses nested structures sets no depth or size limit. A small input can turn into a disproportionate processing load.
The bug in code
The whole CWE-400 classA representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.
Vulnerable
function expand(node) { return node.children.map(expand);}Fixed
const MAX_DEPTH = 32;function expand(node, depth = 0) { if (depth > MAX_DEPTH) throw new Error("too deep"); return node.children.map((c) => expand(c, depth + 1));}Attack context
MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.
Change log
No changes recorded on tracked fields yet. Score, KEV, exploit maturity and fix status changes appear here.
References
Vendor advisories and official records. Exploit/PoC links are deliberately left out.