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CVE-2026-19448

Vulnerabilities in IBM AIX and PowerVM VIOS

HIGH
7.5
CVSS Score
Published: August 20, 2026 at 10:04 PM UTC
Updated: October 26, 2026 at 10:10 AM UTC
3 products affected across 1 vendorAIXVIOSpowervm_vios

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Severity
HIGH7.5
Exploit prediction
EPSS 0.4%
SSVC
No known exploit

Description

IBM AIX 7.2, and 7.3 and IBM PowerVM VIOS 4.1 A stack memory corruption vulnerability exists in the AIX IPsec ESP decapsulation handler. Successful exploitation may corrupt kernel stack state and cause a system crash, resulting in denial of service.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

AIX· IBM
95%
7.2.5 ≤ v ≤ 7.2.5.2127.3.2 ≤ v ≤ 7.3.2.57.3.3 ≤ v ≤ 7.3.3.27.3.4 ≤ v ≤ 7.3.4.17.27.2.07.37.3.0
powervm_vios· IBM
95%
4.14.1.0
VIOS· IBM
95%
All versions4.1.0 ≤ v < 4.1.0.504.1.1.0 ≤ v < 4.1.1.304.1.2.0 ≤ v < 4.1.2.204.1
Affected range stops below 4.1.0.50, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.1.1.30, so it looks safe — our inference, not a vendor statement
Affected range stops below 4.1.2.20, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

Vendor AdvisoryPatch
Source: cverecord
https://www.ibm.com/support/pages/node/7283858

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGH[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-908

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