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CVE-2020-4756IBM 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…
- 6.2MediumCVSS base score
- 0.35%Exploitation in 30 daysEPSS · top 71% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
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.
Timeline
ID reserved
By ibm
- 10 months later
· 10 months later
Published
- 4 years later
· 4 years later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| ibmCNA (assigner) | 3.0 | Medium6.2 | CVSS:3.0/A:H/C:N/PR:N/UI:N/S:U/I:N/AC:L/AV:L/RL:O/RC:C/E:U |
| NVDNVD · Modified | 3.1 | Medium5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.35% · top 71% of all CVEs (13 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.2.
Affected products
- affected 6.0.0
- affected 6.0.1.0
- affected 4.2.0.0
- affected 5.0.0.0
- affected 4.2.3.23
- affected 5.0.5.2
References
References3
- https://www.ibm.com/support/pages/node/6349469 (opens in a new tab)x_refsource_CONFIRMx_transferred
- https://www.ibm.com/support/pages/node/6349475 (opens in a new tab)x_refsource_CONFIRMx_transferred
- ibm-spectrum-cve20204756-dos (188599) (opens in a new tab)vdb-entryx_refsource_XFx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2020-26003 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2020-4756)Record last updated .