CVE-2020-4756

mediumpriority · track · 22EPSS 0.004 · 29 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.35% (29th) EPSS

CVSS 4.9 · medium

Is it mine?

11 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · nvd

EPSS · scored 2026-10-27

IBM Spectrum Scale V4.2.0.0 through V4.2.3.23 and V5.0.0.0 through V5.0.5.2 as well as IBM Elastic Storage System 6.0.0 through 6.0.1.0 could allow a local attacker to invoke a subset of ioctls on the device with invalid arguments that could crash the keneral and cause a denial of service. IBM X-Force ID: 188599.

cvss

Technical severity, 0–10. One row per scoring source.

6.2

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.04.9mediumAV:L/AC:L/Au:N/C:N/I:N/A:Cprimary · NVD / NIST USexploitability 3.9 · impact 6.9

v3.15.5mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:Hprimary · NVD / NIST USexploitability 1.8 · impact 3.6

v3.06.2mediumCVSS:3.0/A:H/C:N/PR:N/UI:N/S:U/I:N/AC:L/AV:L/RL:O/RC:C/E:Usecondary · ENISA EU

v3.06.2mediumCVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:Hsecondary · psirt@us.ibm.com USexploitability 2.5 · impact 3.6

v3.15.1mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-404USprimary

affected products (11)

Products and version ranges known to be affected.

IBM Elastic Storage Server≤ 6.0.1.0enisa_euvdEU
IBM Elastic Storage Server≤ 6.0.0enisa_euvdEU
IBM Spectrum Scale≤ 4.2.3.23enisa_euvdEU
IBM Spectrum Scale≤ 5.0.5.2enisa_euvdEU
IBM Spectrum Scale≤ 4.2.0.0enisa_euvdEU
IBM Spectrum Scale≤ 5.0.0.0enisa_euvdEU
ibm elastic storage server6.0.0.0 → 6.0.1.0nvdUScpe:2.3:a:ibm:elastic_storage_server:*:*:*:*:*:*:*:*
ibm spectrum scale≤ 4.2.3.23nvdUScpe:2.3:a:ibm:spectrum_scale:*:*:*:*:*:*:*:*
ibm spectrum scale≤ 5.0.5.2nvdUScpe:2.3:a:ibm:spectrum_scale:*:*:*:*:*:*:*:*
ibm spectrum scale4.2.0.0 → 4.2.3.23nvdUScpe:2.3:a:ibm:spectrum_scale:*:*:*:*:*:*:*:*
ibm spectrum scale5.0.0.0 → 5.0.5.2nvdUScpe:2.3:a:ibm:spectrum_scale:*:*:*:*:*:*:*:*

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd nvd NVD CVE.org MITRE

published 2020-10-20modified 2026-06-17

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+2014 more

references (14)

External citations — patches, advisories, analysis.

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