CVE-2020-27830

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

0.30% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 22.8% 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

Moderate. Red Hat's rating for its own products, not a CVSS rating.

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

2021-05-13 14:15Z5 YR AGO

Last updated

2024-08-04 16:25Z2 YR AGO

Reserved

2020-10-27

Assigning CNA

redhat

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-476NULL Pointer DereferenceBase

Data version

5.1

Document digest

fdd67bcd57645baabae4eb35e32486a26d1afca8a37f1d3d5fd845f4189c0539

• www.openwall.com[oss-security] 20201208 Re: Linux kernel NULL-ptr deref bug in spk_ttyio_receive_buf2http://www.openwall.com/lists/oss-security/2020/12/08/1mailing-listx_refsource_MLIST
• www.openwall.com[oss-security] 20201208 Re: Linux kernel NULL-ptr deref bug in spk_ttyio_receive_buf2http://www.openwall.com/lists/oss-security/2020/12/08/4mailing-listx_refsource_MLIST
• www.debian.orgDSA-4843https://www.debian.org/security/2021/dsa-4843vendor-advisoryx_refsource_DEBIAN
• lists.debian.org[debian-lts-announce] 20210212 [SECURITY] [DLA 2557-1] linux-4.19 security updatehttps://lists.debian.org/debian-lts-announce/2021/02/msg00018.htmlmailing-listx_refsource_MLIST
• bugzilla.redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=1919900x_refsource_MISC
• security.netapp.comhttps://security.netapp.com/advisory/ntap-20210625-0004/x_refsource_CONFIRM