CVE-2020-28941

Exploitation

Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.

SSVC decision

• ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
• 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

0.33% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 26.1% 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

2020-11-19 15:23Z5 YR AGO

Last updated

2026-05-29 16:06Z5 MO AGO

Reserved

2020-11-19

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Medium (CVSS 5.5)

CNA CVSS vector

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

Weaknesses

• CWE-763Release of Invalid Pointer or ReferenceBase
• CWE-476NULL Pointer DereferenceBase

Data version

5.2

Document digest

e84f99d34418fc7b1c27112712fc34ab776e3dd00feb940f0c772d912bc05bd2

• git.kernel.orghttps://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git/commit/?h=tty-linus&id=d4122754442799187d5d537a9c039a49a67e57f1x_refsource_MISC
• www.openwall.comhttps://www.openwall.com/lists/oss-security/2020/11/19/3x_refsource_MISC
• github.comhttps://github.com/torvalds/linux/commit/d4122754442799187d5d537a9c039a49a67e57f1x_refsource_MISC
• git.kernel.orghttps://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=d4122754442799187d5d537a9c039a49a67e57f1x_refsource_MISC
• www.openwall.com[oss-security] 20201119 Re: Linux kernel NULL-ptr deref bug in spk_ttyio_ldisc_closehttp://www.openwall.com/lists/oss-security/2020/11/19/5mailing-listx_refsource_MLIST
• lists.fedoraproject.orgFEDORA-2020-4700a73bd5https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZF4OGZPKTAJJXWHPIFP3LHEWWEMR5LPT/vendor-advisoryx_refsource_FEDORA
• lists.fedoraproject.orgFEDORA-2020-8c15928d23https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TITJQPYDWZ4NB2ONJWUXW75KSQIPF35T/vendor-advisoryx_refsource_FEDORA
• lists.debian.org[debian-lts-announce] 20201210 [SECURITY] [DLA 2483-1] linux-4.19 security updatehttps://lists.debian.org/debian-lts-announce/2020/12/msg00015.htmlmailing-listx_refsource_MLIST