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01 Record

CVE-2020-4839

IBM Host firmware for LC-class Systems is vulnerable to a stack based buffer overflow, caused by improper bounds checking. A remote privileged attacker could exploit this vulnerability and cause a

MediumPUBLISHEDCNA: ibm
CNA base score4.9 CVSS v3.xCVSS:3.0/PR:H/UI:N/AC:L/S:U/A:H/AV:N/I:N/C:N/RC:C/RL:O/E:U
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02 Description

IBM Host firmware for LC-class Systems is vulnerable to a stack based buffer overflow, caused by improper bounds checking. A remote privileged attacker could exploit this vulnerability and cause a

03 Exploitation and scoring

Exploitation
Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision
Not assessed by CISA
EPSS probability
1.51% probability of exploitation activity in the next 30 days.
EPSS percentile
Equal to or higher than the score of 74.0% of scored records. A rank, not a probability.
NVD base score
4.9 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
NVD analysis status
Modified. NVD last modified this record on 2026-06-17.
Red Hat severity
No Red Hat rating. Red Hat rates the CVEs that affect its products.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published
2021-05-25 16:00Z5 YR AGO
Last updated
2024-09-16 20:31Z2 YR AGO
Reserved
2019-12-30
Assigning CNA
ibm
Record state
PUBLISHED
Severity
Medium (CVSS 4.9)
CNA CVSS vector
CVSS:3.0/PR:H/UI:N/AC:L/S:U/A:H/AV:N/I:N/C:N/RC:C/RL:O/E:U
Weaknesses
Data version
5.1
Document digest
c88f1fc38ed31296e5117383a36c301c73239d6588efb751c90e2ed7e2a66d54

05 Affected products

VendorProductVersionsPlatforms
IBM8335-GTBOP820—
IBM8335-GTAOP820—
IBM8335-GCAOP820—

06 References