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CVE-2026-4936

Power System Insufficient Entropy

CVSS score

5.1

EPSS probability

%0.1

Risk score

0.0

Published

1 mo ago

OverviewPublic Exploits (0)NewsroomVulnerability Timeline
Official patch verified

Etkilenen ürün ve sürüm için yayımlanan güvenlik güncellemesini uygulayın.

Impact on My Inventory

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Vulnerability description

DayBreach CVE AI Research

CVE-2026-4936 has vendor, distribution, patch and security-source records on file. We can compare them and prepare an explanation linked to the evidence.

IBM PowerVM Hypervisor Platform KeyStore (PKS) and virtual TPM FW1110.00 through FW1110.20, FW1060.00 through FW1060.71, and FW950.00 through FW950.H2 use persistent storage key seeds that result in an AES key with reduced strength. An attacker with access to the service processor or HMC could exploit this weakness to derive the encryption key and access the data.

IMPACT: Affected Products and Software

Affected Products

The following products are affected by CVE-2026-4936 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.

IDVENDORPRODUCTACTION
1ibmPowerVM Hypervisor View
2ibmpower system s1122 (9824-22a) firmware View
3ibmpower system s1122 (9824-22a) firmware View
4ibmpower system s1122 (9824-22a) View
5ibmpower system s1124 (9824-42a) firmware View
6ibmpower system s1124 (9824-42a) firmware View
7ibmpower system s1124 (9824-42a) View
8ibmpower system s1122s (9824-22b) firmware View
9ibmpower system s1122s (9824-22b) firmware View
10ibmpower system s1122s (9824-22b) View
11ibmpower system s1114 (9824-41b) firmware View
12ibmpower system s1114 (9824-41b) firmware View
13ibmpower system s1114 (9824-41b) View
14ibmpower system l1122 (9856-22h) firmware View
15ibmpower system l1122 (9856-22h) firmware View
16ibmpower system l1122 (9856-22h) View
17ibmpower system l1124 (9856-42h) firmware View
18ibmpower system l1124 (9856-42h) firmware View
19ibmpower system l1124 (9856-42h) View
20ibmpower system e1150 (9043-mru) firmware View
21ibmpower system e1150 (9043-mru) firmware View
22ibmpower system e1150 (9043-mru) View
23ibmpower system s1112 (9242-21b) firmware View
24ibmpower system s1112 (9242-21b) View
25ibmpower system s1112 (9242-21t) firmware View
26ibmpower system s1112 (9242-21t) View
27ibmpower system e1080 (9080-hex) firmware View
28ibmpower system e1080 (9080-hex) View
29ibmpower system s1022 (9105-22a) firmware View
30ibmpower system s1022 (9105-22a) View
31ibmpower system s1024 (9105-42a) firmware View
32ibmpower system s1024 (9105-42a) View
33ibmpower system s1022s (9105-22b) firmware View
34ibmpower system s1022s (9105-22b) View
35ibmpower system s1014 (9105-41b) firmware View
36ibmpower system s1014 (9105-41b) View
37ibmpower system l1022 (9786-22h) firmware View
38ibmpower system l1022 (9786-22h) View
39ibmpower system l1024 (9786-42h) firmware View
40ibmpower system l1024 (9786-42h) View
41ibmpower system e1050 (9043-mrx) firmware View
42ibmpower system e1050 (9043-mrx) View
43ibmpower system s1012 (9028-21b) firmware View
44ibmpower system s1012 (9028-21b) View
45ibmpower system e1180 (9080-heu) firmware View
46ibmpower system e1180 (9080-heu) firmware View
47ibmpower system e1180 (9080-heu) View
48ibmpower system s922 (9009-22g) firmware View
49ibmpower system s922 (9009-22g) View
50ibmpower system h922 (9223-22s) firmware View
51ibmpower system h922 (9223-22s) View
52ibmpower system s914 (9009-41g) firmware View
53ibmpower system s914 (9009-41g) View
54ibmpower system s924 (9009-42g) firmware View
55ibmpower system s924 (9009-42g) View
56ibmpower system h924 (9223-42s) firmware View
57ibmpower system h924 (9223-42s) View
58ibmpower system e950 (9040-mr9) firmware View
59ibmpower system e950 (9040-mr9) View
60ibmpower system e980 (9080-m9s) firmware View
61ibmpower system e980 (9080-m9s) View
Total affected vendors: 1|Products: 61

RED HAT CSAF/VEX: Product Impact Check

Red Hat has not yet published a CSAF/VEX impact record for this CVE. This does not mean “not affected”.

SCORING: CVSS from Multiple Sources

CVSS Scores

The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.

SCOREVERSIONSEVERITYVECTORSOURCE
6.2CVSS V31MEDIUMCVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:NNVD
5.1CVSS V3_1MEDIUMCVSS:3.1/AV:A/AC:H/PR:H/UI:R/S:C/C:H/I:N/A:NCVE CNA
5.1CVSS V31MEDIUMCVSS:3.1/AV:A/AC:H/PR:H/UI:R/S:C/C:H/I:N/A:NNVD

Patch and Remediation Guide

Solution & Remediation Advisory

Patch verified

2 doğrulanmış yama veya düzeltilmiş sürüm kanıtı bulundu.

cvelist

CNA çözüm referansı

Open source
reference

Yama veya çözüm referansı

Open source
Confirm the affected product and version against the source evidence above.
Restrict access to internet-facing services and apply network segmentation.
Apply the official update named in the evidence only to the matching product and version.
Monitor server logs and network endpoints for signs of anomalous execution.

Public exploit and active exploitation status

Verified exploit intelligence

No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.

Weakness Classification and Attack Patterns (CWE & CAPEC)

CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-4936 is associated with the following CWEs:

CWE-331: Common Weakness Enumeration Entry CWE-331

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-4936 weaknesses.

CAPEC-66: SQL InjectionCAPEC-126: Path TraversalCAPEC-28: OS Command Injection

Attack Vector and Accessibility

ExposureBitişik ağ
PermissionsHigh
UserGerekiyor

Official Sources and Advisories

https://www.ibm.com/support/pages/node/7283890patch

CVSS Vector Radar Chart

5.1 / 10
Attack VectorAdjacentComplexityHighPrivilegesHighUser Interact.RequiredConfidentialityHighIntegrityNoneAvailabilityNone

Vulnerability Scoring Details

CVSS:3.1/AV:A/AC:H/PR:H/UI:R/S:C/C:H/I:N/A:N
Attack VectorAdjacent network
Attack ComplexityHigh
Privileges RequiredHigh privileges
User Interaction—
Confidentiality (Gizlilik)High
Integrity (Bütünlük)None
Availability (Erişilebilirlik)None

Yama doğrulandı

2 doğrulanmış yama veya düzeltilmiş sürüm kanıtı bulundu.

Follow the vendor

I
ibm logo
ibm

Weakness Type (CWE & CAPEC)

CWE-331

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