CVE-2020-23856

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

0.42% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 35.9% 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:L/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.

Published

2021-05-18 14:41Z5 YR AGO

Last updated

2024-08-04 15:05Z2 YR 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-416Use After FreeVariant

Data version

5.1

Document digest

d57775b5f3b41543709648fdda91217a7dbcb22535b81c515392e0d5d4beec7b

• lists.gnu.orghttps://lists.gnu.org/archive/html/bug-cflow/2020-07/msg00000.htmlx_refsource_MISC
• github.comhttps://github.com/yangjiageng/PoC/blob/master/PoC_cflow_uaf_parser_line1284x_refsource_MISC
• lists.fedoraproject.orgFEDORA-2021-e8cab459abhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/FZTTKZX274BVFZX7TMPEZG6UWL6UPMQF/vendor-advisoryx_refsource_FEDORA
• lists.fedoraproject.orgFEDORA-2021-6ef76430d0https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/BLSXGFK2NYPCJMPHSHE3W56ZU3ZO6RD7/vendor-advisoryx_refsource_FEDORA