CVE Intelligence
Medium Memory corruption

CVE-2026-17504 — Integer Underflow in Ibm Power System E1050 (9043-mrx) Firmware

IBM PowerVM Hypervisor FW1120.00 through FW1120.01, FW1110.00 through FW1110.31, FW1060.00 through FW1060.81, and FW950.00 through FW950.H3 is affected by a vulnerability in the partition firmware runtime. An attacker with root access to a partition can send a specially crafted request to the partition firmware runtime, causing it to crash with possible memory corruption.

Published Sep 24, 2026 · Updated Oct 15, 2026 · Sources: NIST National Vulnerability Database · CNA: psirt@us.ibm.com

Who exploits it and how urgent it is

A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.

No exploitation signal in the sources consulted so far.
How the score was calculated
  • Technical severity (medium)+3

The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).

Triage

Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.

Exploitation
Not confirmed
Not in CISA KEV — an absence of record, not proof it is unexploited.
EPSS FIRST
—
No EPSS score.
Affects
Ibm
Power System E1050 (9043-mrx) Firmware and 25 more
CVSS base
4.4
Medium · 2 source(s)
Prioritization reference: 5.1 provisional

Remediation

Fixes and mitigations documented by the sources — linked to the original advisory.

  • Documented patch — www.ibm.com (NIST National Vulnerability Database)

First 24 hours

Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.

  1. Identify exposed assets running the affected vendor/product/version combinations (Ibm Power System E1050 (9043-mrx) Firmware, Ibm Power System E1080 (9080-hex) Firmware, Ibm Power System E1150 (9043-mru) Firmware…).
  2. Apply the fixed version or the patch documented under Remediation.
  3. Search available logs for exploit probes matching the vulnerability class (memory corruption), errors and authentication anomalies.

Affected scope

Vendor, product and versions as the sources word them.

VendorProductVersionsStatusSource
Ibm Power System E1050 (9043-mrx) Firmware ≥ fw1060.00 and < fw1060.81 Vulnerable NIST National Vulnerability Database
Ibm Power System E1080 (9080-hex) Firmware ≥ fw1060.00 and < fw1060.81 Vulnerable NIST National Vulnerability Database
Ibm Power System E1150 (9043-mru) Firmware ≥ fw1110.00 and < fw1110.31version fw1120.00 Vulnerable NIST National Vulnerability Database
Ibm Power System E1180 (9080-heu) Firmware ≥ fw1110.00 and < fw1110.31version fw1120.00 Vulnerable NIST National Vulnerability Database
Ibm Power System E950 (9040-mr9) Firmware ≥ fw950.00 and < fw950.h3 Vulnerable NIST National Vulnerability Database
Ibm Power System E980 (9080-m9s) Firmware ≥ fw950.00 and < fw950.h3 Vulnerable NIST National Vulnerability Database
Ibm Power System H922 (9223-22s) Firmware ≥ fw950.00 and < fw950.h3 Vulnerable NIST National Vulnerability Database
Ibm Power System H924 (9223-42s) Firmware ≥ fw950.00 and < fw950.h3 Vulnerable NIST National Vulnerability Database
Ibm Power System L1022 (9786-22h) Firmware ≥ fw1060.00 and < fw1060.81 Vulnerable NIST National Vulnerability Database
Ibm Power System L1024 (9786-42h) Firmware ≥ fw1060.00 and < fw1060.81 Vulnerable NIST National Vulnerability Database
Ibm Power System L1122 (9856-22h) Firmware ≥ fw1110.00 and < fw1110.31version fw1120.00 Vulnerable NIST National Vulnerability Database
Ibm Power System L1124 (9856-42h) Firmware version fw1120.00≥ fw1110.00 and < fw1110.31 Vulnerable NIST National Vulnerability Database
Ibm Power System S1012 (9028-21b) Firmware ≥ fw1060.00 and < fw1060.81 Vulnerable NIST National Vulnerability Database
Ibm Power System S1014 (9105-41b) Firmware ≥ fw1060.00 and < fw1060.81 Vulnerable NIST National Vulnerability Database
Ibm Power System S1022 (9105-22a) Firmware ≥ fw1060.00 and < fw1060.81 Vulnerable NIST National Vulnerability Database
Ibm Power System S1022s (9105-22b) Firmware ≥ fw1060.00 and < fw1060.81 Vulnerable NIST National Vulnerability Database
Ibm Power System S1024 (9105-42a) Firmware ≥ fw1060.00 and < fw1060.81 Vulnerable NIST National Vulnerability Database
Ibm Power System S1112 (9242-21b) Firmware version fw1120.00 Vulnerable NIST National Vulnerability Database
Ibm Power System S1112 (9242-21t) Firmware version fw1120.00 Vulnerable NIST National Vulnerability Database
Ibm Power System S1114 (9824-41b) Firmware version fw1120.00≥ fw1110.00 and < fw1110.31 Vulnerable NIST National Vulnerability Database
Ibm Power System S1122 (9824-22a) Firmware version fw1120.00≥ fw1110.00 and < fw1110.31 Vulnerable NIST National Vulnerability Database
Ibm Power System S1122s (9824-22b) Firmware version fw1120.00≥ fw1110.00 and < fw1110.31 Vulnerable NIST National Vulnerability Database
Ibm Power System S1124 (9824-42a) Firmware version fw1120.00≥ fw1110.00 and < fw1110.31 Vulnerable NIST National Vulnerability Database
Ibm Power System S914 (9009-41g) Firmware ≥ fw950.00 and < fw950.h3 Vulnerable NIST National Vulnerability Database
Ibm Power System S922 (9009-22g) Firmware ≥ fw950.00 and < fw950.h3 Vulnerable NIST National Vulnerability Database
Ibm Power System S924 (9009-42g) Firmware ≥ fw950.00 and < fw950.h3 Vulnerable NIST National Vulnerability Database

Attack characteristics

The CVSS vector, decoded. It describes the attack, not your exposure to it.

Attack vector
Local
Attack complexity
Low
Privileges required
High
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

Every base score collected

Sources score independently and may disagree; each row says who scored it and under which version.

ScoreVersionSeverityExpl.ImpactScored by
5.1 CVSS 3.1 Medium 0.8 4.2 psirt@us.ibm.com via NIST National Vulnerability Database
4.4 CVSS 3.1 Medium 0.8 3.6 nvd@nist.gov via NIST National Vulnerability Database
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H (score shown at the top: nvd@nist.gov)
Scoring entities (NIST, CNA, ADP) score independently; each score is shown with its origin. For prioritization we use 5.1 (psirt@us.ibm.com via NIST National Vulnerability Database) as a conservative provisional reference — not a definitive official score.

Weakness MITRE

Weakness class according to MITRE’s CWE catalog.

CWE-191 · Integer Underflow

Other CVEs with this weakness →

Detection

Read off the CVSS vector and the weakness class. Starting points, not tested rules.

  • Local/physical vector: focus on endpoint telemetry (EDR) from affected hosts.
  • Correlate service crashes/restarts with inbound traffic; repeated crashes may indicate attempts.
endpoint telemetry (EDR)crash dumps

Timeline

What happened to this CVE, newest first.

  • 2026
  • Record published
    Oct 15, 2026
  • Fix documented
    Oct 15, 2026 · NIST National Vulnerability Database
  • CVSS changed · 4.4
    Oct 15, 2026 · NIST National Vulnerability Database
  • Source status changed · → Undergoing Analysis
    Oct 15, 2026 · NIST National Vulnerability Database
  • Record created in this database
    Oct 15, 2026 · NIST National Vulnerability Database
  • CVE published
    Sep 24, 2026 · psirt@us.ibm.com

Source activity

Repeated readings are counted rather than listed.

  • 1× Official description updated · Oct 15, 2026 – Oct 15, 2026

References

1 on the record

Elsewhere on this site

Ibm
every CVE for this vendor
Memory corruption
same class
CWE-191
other pages naming this weakness

Related CVEs (same products)

  • CVE-2026-93306 Out-of-bounds Read in Ibm Power System E1080 (9080-hex) Firmware 20d
  • CVE-2026-18870 Out-of-bounds Read in Ibm Power System S1122 (9824-22a) Firmware 21d
  • CVE-2026-19492 Use of Uninitialized Variable in Ibm Power System S1122 (9824-22a) Firmware 21d
  • CVE-2026-18857 Out-of-bounds Read in Ibm Power System S1122 (9824-22a) Firmware 21d
  • CVE-2026-17503 Improper Input Validation in Ibm Power System S1122 (9824-22a) Firmware 21d
  • CVE-2026-17511 IBM PowerVM Hypervisor FW1120.00 through FW1120.01, FW1110.00 through FW1110.31… 21d

Not in any source we poll

Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.

  • No FIRST EPSS score.
  • No CISA SSVC assessment.
  • No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
  • No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
  • No exploit packet captures, log samples, or incident case IDs supplied.

Answered from this record

Text assembled only from the fields above — no additional claims.

What should defenders know first?

CVE-2026-17504 is "Integer Underflow in Ibm Power System E1050 (9043-mrx) Firmware", rated Medium. It affects Power System E1050 (9043-mrx) Firmware (Ibm); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. CVSS 4.4 describes technical severity. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.

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