Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-19448

CVE-2026-19448HIGH

IBM AIX — Vulnerabilities in IBM AIX and PowerVM VIOS

  AV  AC  PR  UI  S  C  I  A   CVSS    EPSS   %ile   KEV
   N   L   N   N  U  N  N  H    7.5   .0025   14.7     —

AFFECTED
  Product       Versions  Fixed
  AIX           7.2 –     —
  PowerVM VIOS  4.1 –     —

TIMELINE
  Aug 10  Reserved by ibm
  Aug 20  Published (CNA: ibm)
  Aug 25  RESCORED — CVE-2026-19448 (IBM AIX). CVSS 6.5 → 7.5 (NVD).

CWE-908 · CNA: ibm · CVSS v3.1 · 1 reference · NVD status: Analyzed

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.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
August 10, 2026	Reserved	Reserved by ibm
August 20, 2026	Published	Published (CNA: ibm)
August 25, 2026	RESCORED	RESCORED — CVE-2026-19448 (IBM AIX). CVSS 6.5 → 7.5 (NVD).

Affected

Affected products and packages — 2 rows
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
IBM	AIX	—	7.2	—
IBM	PowerVM VIOS	—	4.1	—

Weaknesses

CWE-908

References (1)

https://www.ibm.com/support/pages/node/7283858 [Patch, Vendor Advisory]

Authoritative record: CVE-2026-19448 at cve.org

Vendors: ibm

Weaknesses: CWE-908

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-19448 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.