CVE-2020-25668

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

1.02% probability of exploitation activity in the next 30 days.

EPSS percentile

Equal to or higher than the score of 63.2% of scored records. A rank, not a probability.

NVD base score

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

NVD CVSS vector

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

2021-05-26 11:11Z5 YR AGO

Last updated

2024-08-04 15:40Z2 YR AGO

Reserved

2020-09-16

Assigning CNA

redhat

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

• CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')Class
• CWE-662Improper SynchronizationClass
• CWE-366Race Condition within a ThreadBase

Data version

5.1

Document digest

abf79857f58f71b71d821de9f060013e8d6ef5856ef7114719fb8973018e1799

• www.openwall.com[oss-security] 20201030 CVE-2020-25668: Linux kernel concurrency use-after-free in vthttp://www.openwall.com/lists/oss-security/2020/10/30/1mailing-listx_refsource_MLIST
• www.openwall.com[oss-security] 20201104 Re: CVE-2020-25668: Linux kernel concurrency use-after-free in vthttp://www.openwall.com/lists/oss-security/2020/11/04/3mailing-listx_refsource_MLIST
• 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
• lists.debian.org[debian-lts-announce] 20201218 [SECURITY] [DLA 2494-1] linux security updatehttps://lists.debian.org/debian-lts-announce/2020/12/msg00027.htmlmailing-listx_refsource_MLIST
• www.openwall.comhttps://www.openwall.com/lists/oss-security/2020/11/04/3%2Cx_refsource_MISC
• www.openwall.comhttps://www.openwall.com/lists/oss-security/2020/10/30/1%2Cx_refsource_MISC
• bugzilla.redhat.comhttps://bugzilla.redhat.com/show_bug.cgi?id=1893287%2Cx_refsource_MISC
• git.kernel.orghttps://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit?id=90bfdeef83f1d6c696039b6a917190dcbbad3220x_refsource_MISC
• security.netapp.comhttps://security.netapp.com/advisory/ntap-20210702-0005/x_refsource_CONFIRM