CVE-2020-21047

Exploitation

Public exploit code exists. CISA's assessment records a public proof of concept. That is not a report of exploitation in the wild.

SSVC decision

• ExploitationpocPublic proof-of-concept exploit code exists. Not a report of exploitation in the wild.
• AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
• Technical ImpactpartialSuccessful exploitation gives limited control of the vulnerable component.

CISA publishes the decision points, not a final SSVC decision. The decision also depends on mission and well-being impact, which is a property of your deployment rather than of the vulnerability.

EPSS probability

0.25% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 16.3% of scored records. A rank, not a probability.

NVD base score

5.5 (CVSS v3.x), scored by the NVD independently of the CNA.

NVD CVSS vector

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

NVD analysis status

Modified. NVD last modified this record on 2026-10-14.

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.

Published

2023-08-22 00:00Z3 YR AGO

Last updated

2026-10-14 09:35Z14 DAYS AGO

Reserved

2020-08-13

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-787Out-of-bounds WriteBase

Data version

5.2

Document digest

134e996ec4fcdcf004e68893c2ef3d960abfefea0d0565235979bc4c34a5e93c

• sourceware.orghttps://sourceware.org/bugzilla/show_bug.cgi?id=25068
• sourceware.orghttps://sourceware.org/git/?p=elfutils.git%3Ba=commitdiff%3Bh=99dc63b10b3878616b85df2dfd2e4e7103e414b8
• lists.debian.org[debian-lts-announce] 20230923 [SECURITY] [DLA 3579-1] elfutils security updatehttps://lists.debian.org/debian-lts-announce/2023/09/msg00026.htmlmailing-list
• cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-398330.html
• cert-portal.siemens.comhttps://cert-portal.siemens.com/productcert/html/ssa-202008.html