CVE & CISA-KEV CatalogNVD
CVE-2020-25668
HIGH7.0
CVSS v3
Description
A flaw was found in Linux Kernel because access to the global variable fg_console is not properly synchronized leading to a use after free in con_font_op.
How to fix
Remediation Available
linuxDebian
Fixed in:5.9.6-1CVE-2020-25668
Fixed in:5.9.6-1CVE-2020-25668
Fixed in:5.9.6-1CVE-2020-25668
Fixed in:5.9.6-1CVE-2020-25668
linuxUbuntu
linux-awsUbuntu
Fixed in:4.4.0-1083.87USN-4681-1
Fixed in:4.4.0-1119.133USN-4681-1
Fixed in:4.15.0-1091.96USN-4680-1
Fixed in:5.4.0-1034.35USN-4679-1
linux-aws-5.4Ubuntu
Fixed in:5.4.0-1034.35~18.04.1USN-4679-1
linux-aws-hweUbuntu
Fixed in:4.15.0-1091.96~16.04.1USN-4680-1
linux-azureUbuntu
Fixed in:4.15.0-1103.114~14.04.1USN-4680-1
Fixed in:4.15.0-1103.114~16.04.1USN-4680-1
Fixed in:5.4.0-1035.36USN-4679-1
linux-azure-4.15Ubuntu
Fixed in:4.15.0-1103.114USN-4680-1
linux-azure-5.4Ubuntu
Fixed in:5.4.0-1035.36~18.04.1USN-4679-1
linux-gcpUbuntu
Fixed in:4.15.0-1091.104~16.04.1USN-4680-1
Fixed in:5.4.0-1033.35USN-4679-1
linux-gcp-4.15Ubuntu
Fixed in:4.15.0-1091.104USN-4680-1
linux-gcp-5.4Ubuntu
Fixed in:5.4.0-1033.35~18.04.1USN-4679-1
linux-gke-4.15Ubuntu
Fixed in:4.15.0-1077.82USN-4680-1
linux-gke-5.4Ubuntu
Fixed in:5.4.0-1033.35~18.04.1USN-4679-1
linux-hweUbuntu
Fixed in:4.15.0-129.132~16.04.1USN-4680-1
linux-hwe-5.4Ubuntu
Fixed in:5.4.0-59.65~18.04.1USN-4679-1
linux-hwe-5.8Ubuntu
Fixed in:5.8.0-44.50~20.04.1USN-4751-1
linux-image-4.15.0-1062-oracleUbuntu
Fixed in:4.15.0-1062.68~16.04.1USN-4680-1
Fixed in:4.15.0-1062.68USN-4680-1
linux-image-4.15.0-1077-gkeUbuntu
Fixed in:4.15.0-1077.82USN-4680-1
linux-image-4.15.0-1077-raspi2Ubuntu
Fixed in:4.15.0-1077.82USN-4680-1
linux-image-4.15.0-1082-kvmUbuntu
Fixed in:4.15.0-1082.84USN-4680-1
linux-image-4.15.0-1091-awsUbuntu
Fixed in:4.15.0-1091.96~16.04.1USN-4680-1
Fixed in:4.15.0-1091.96USN-4680-1
linux-image-4.15.0-1091-gcpUbuntu
Fixed in:4.15.0-1091.104~16.04.1USN-4680-1
Fixed in:4.15.0-1091.104USN-4680-1
linux-image-4.15.0-1094-snapdragonUbuntu
Fixed in:4.15.0-1094.103USN-4680-1
linux-image-4.15.0-1103-azureUbuntu
Fixed in:4.15.0-1103.114~14.04.1USN-4680-1
Fixed in:4.15.0-1103.114~16.04.1USN-4680-1
Fixed in:4.15.0-1103.114USN-4680-1
linux-image-4.15.0-129-genericUbuntu
Fixed in:4.15.0-129.132~16.04.1USN-4680-1
Fixed in:4.15.0-129.132USN-4680-1
linux-image-4.15.0-129-generic-lpaeUbuntu
Fixed in:4.15.0-129.132~16.04.1USN-4680-1
Fixed in:4.15.0-129.132USN-4680-1
linux-image-4.15.0-129-lowlatencyUbuntu
Fixed in:4.15.0-129.132~16.04.1USN-4680-1
Fixed in:4.15.0-129.132USN-4680-1
linux-image-4.4.0-1083-awsUbuntu
Fixed in:4.4.0-1083.87USN-4681-1
linux-image-4.4.0-1085-kvmUbuntu
Fixed in:4.4.0-1085.94USN-4681-1
linux-image-4.4.0-1119-awsUbuntu
Fixed in:4.4.0-1119.133USN-4681-1
linux-image-4.4.0-1143-raspi2Ubuntu
Fixed in:4.4.0-1143.153USN-4681-1
linux-image-4.4.0-1147-snapdragonUbuntu
Fixed in:4.4.0-1147.157USN-4681-1
linux-image-4.4.0-198-genericUbuntu
Fixed in:4.4.0-198.230~14.04.1USN-4681-1
Fixed in:4.4.0-198.230USN-4681-1
linux-image-4.4.0-198-generic-lpaeUbuntu
Fixed in:4.4.0-198.230~14.04.1USN-4681-1
Fixed in:4.4.0-198.230USN-4681-1
linux-image-4.4.0-198-lowlatencyUbuntu
Fixed in:4.4.0-198.230~14.04.1USN-4681-1
Fixed in:4.4.0-198.230USN-4681-1
linux-image-4.4.0-198-powerpc-e500mcUbuntu
Fixed in:4.4.0-198.230~14.04.1USN-4681-1
Fixed in:4.4.0-198.230USN-4681-1
linux-image-4.4.0-198-powerpc-smpUbuntu
Fixed in:4.4.0-198.230~14.04.1USN-4681-1
Fixed in:4.4.0-198.230USN-4681-1
linux-image-4.4.0-198-powerpc64-embUbuntu
Fixed in:4.4.0-198.230~14.04.1USN-4681-1
Fixed in:4.4.0-198.230USN-4681-1
linux-image-4.4.0-198-powerpc64-smpUbuntu
Fixed in:4.4.0-198.230~14.04.1USN-4681-1
Fixed in:4.4.0-198.230USN-4681-1
linux-image-5.4.0-1026-raspiUbuntu
Fixed in:5.4.0-1026.29~18.04.1USN-4679-1
Fixed in:5.4.0-1026.29USN-4679-1
linux-image-5.4.0-1031-kvmUbuntu
Fixed in:5.4.0-1031.32USN-4679-1
linux-image-5.4.0-1033-gcpUbuntu
Fixed in:5.4.0-1033.35~18.04.1USN-4679-1
Fixed in:5.4.0-1033.35USN-4679-1
linux-image-5.4.0-1033-gkeUbuntu
Fixed in:5.4.0-1033.35~18.04.1USN-4679-1
linux-image-5.4.0-1034-awsUbuntu
Fixed in:5.4.0-1034.35~18.04.1USN-4679-1
Fixed in:5.4.0-1034.35USN-4679-1
linux-image-5.4.0-1034-oracleUbuntu
Fixed in:5.4.0-1034.36~18.04.1USN-4679-1
Fixed in:5.4.0-1034.36USN-4679-1
linux-image-5.4.0-1035-azureUbuntu
Fixed in:5.4.0-1035.36~18.04.1USN-4679-1
Fixed in:5.4.0-1035.36USN-4679-1
linux-image-5.4.0-59-genericUbuntu
Fixed in:5.4.0-59.65~18.04.1USN-4679-1
Fixed in:5.4.0-59.65USN-4679-1
linux-image-5.4.0-59-generic-lpaeUbuntu
Fixed in:5.4.0-59.65~18.04.1USN-4679-1
Fixed in:5.4.0-59.65USN-4679-1
linux-image-5.4.0-59-lowlatencyUbuntu
Fixed in:5.4.0-59.65~18.04.1USN-4679-1
Fixed in:5.4.0-59.65USN-4679-1
linux-image-5.8.0-44-genericUbuntu
Fixed in:5.8.0-44.50~20.04.1USN-4751-1
linux-image-5.8.0-44-generic-lpaeUbuntu
Fixed in:5.8.0-44.50~20.04.1USN-4751-1
linux-image-5.8.0-44-lowlatencyUbuntu
Fixed in:5.8.0-44.50~20.04.1USN-4751-1
linux-image-awsUbuntu
Fixed in:4.4.0.1083.80USN-4681-1
Fixed in:4.4.0.1119.124USN-4681-1
Fixed in:5.4.0.1034.19USN-4679-1
Fixed in:5.4.0.1034.35USN-4679-1
linux-image-aws-hweUbuntu
Fixed in:4.15.0.1091.85USN-4680-1
linux-image-aws-lts-18.04Ubuntu
Fixed in:4.15.0.1091.93USN-4680-1
linux-image-azureUbuntu
Fixed in:4.15.0.1103.78USN-4680-1
Fixed in:4.15.0.1103.96USN-4680-1
Fixed in:5.4.0.1035.17USN-4679-1
Fixed in:5.4.0.1035.33USN-4679-1
linux-image-azure-lts-18.04Ubuntu
Fixed in:4.15.0.1103.76USN-4680-1
linux-image-gcpUbuntu
linux-image-gcp-lts-18.04Ubuntu
Fixed in:4.15.0.1091.109USN-4680-1
linux-image-genericUbuntu
linux-image-generic-64k-hwe-20.04Ubuntu
Fixed in:5.8.0.44.50~20.04.30USN-4751-1
linux-image-generic-hwe-16.04Ubuntu
Fixed in:4.15.0.129.128USN-4680-1
linux-image-generic-hwe-18.04Ubuntu
Fixed in:5.4.0.59.65~18.04.54USN-4679-1
linux-image-generic-hwe-20.04Ubuntu
Fixed in:5.8.0.44.50~20.04.30USN-4751-1
linux-image-generic-lpaeUbuntu
linux-image-generic-lpae-hwe-16.04Ubuntu
Fixed in:4.15.0.129.128USN-4680-1
linux-image-generic-lpae-hwe-18.04Ubuntu
Fixed in:5.4.0.59.65~18.04.54USN-4679-1
linux-image-generic-lpae-hwe-20.04Ubuntu
Fixed in:5.8.0.44.50~20.04.30USN-4751-1
linux-image-generic-lpae-lts-xenialUbuntu
Fixed in:4.4.0.198.173USN-4681-1
linux-image-generic-lts-xenialUbuntu
Fixed in:4.4.0.198.173USN-4681-1
linux-image-gkeUbuntu
Fixed in:4.15.0.1091.92USN-4680-1
Fixed in:4.15.0.1077.81USN-4680-1
linux-image-gke-4.15Ubuntu
Fixed in:4.15.0.1077.81USN-4680-1
linux-image-gke-5.4Ubuntu
Fixed in:5.4.0.1033.35~18.04.2USN-4679-1
linux-image-kvmUbuntu
linux-image-lowlatencyUbuntu
linux-image-lowlatency-hwe-16.04Ubuntu
Fixed in:4.15.0.129.128USN-4680-1
linux-image-lowlatency-hwe-18.04Ubuntu
Fixed in:5.4.0.59.65~18.04.54USN-4679-1
linux-image-lowlatency-hwe-20.04Ubuntu
Fixed in:5.8.0.44.50~20.04.30USN-4751-1
linux-image-lowlatency-lts-xenialUbuntu
Fixed in:4.4.0.198.173USN-4681-1
linux-image-oemUbuntu
Fixed in:4.15.0.129.128USN-4680-1
Fixed in:5.4.0.59.65~18.04.54USN-4679-1
Fixed in:5.4.0.59.62USN-4679-1
linux-image-oem-osp1Ubuntu
Fixed in:5.4.0.59.65~18.04.54USN-4679-1
Fixed in:5.4.0.59.62USN-4679-1
linux-image-oracleUbuntu
Fixed in:4.15.0.1062.51USN-4680-1
Fixed in:5.4.0.1034.36~18.04.18USN-4679-1
Fixed in:5.4.0.1034.31USN-4679-1
linux-image-oracle-lts-18.04Ubuntu
Fixed in:4.15.0.1062.72USN-4680-1
linux-image-powerpc-e500mcUbuntu
Fixed in:4.4.0.198.204USN-4681-1
linux-image-powerpc-e500mc-lts-xenialUbuntu
Fixed in:4.4.0.198.173USN-4681-1
linux-image-powerpc-smpUbuntu
Fixed in:4.4.0.198.204USN-4681-1
linux-image-powerpc-smp-lts-xenialUbuntu
Fixed in:4.4.0.198.173USN-4681-1
linux-image-powerpc64-embUbuntu
Fixed in:4.4.0.198.204USN-4681-1
linux-image-powerpc64-emb-lts-xenialUbuntu
Fixed in:4.4.0.198.173USN-4681-1
linux-image-powerpc64-smpUbuntu
Fixed in:4.4.0.198.204USN-4681-1
linux-image-powerpc64-smp-lts-xenialUbuntu
Fixed in:4.4.0.198.173USN-4681-1
linux-image-raspiUbuntu
Fixed in:5.4.0.1026.61USN-4679-1
linux-image-raspi-hwe-18.04Ubuntu
Fixed in:5.4.0.1026.30USN-4679-1
linux-image-raspi2Ubuntu
linux-image-snapdragonUbuntu
Fixed in:4.4.0.1147.139USN-4681-1
Fixed in:4.15.0.1094.97USN-4680-1
linux-image-snapdragon-hwe-18.04Ubuntu
Fixed in:5.4.0.59.65~18.04.54USN-4679-1
linux-image-virtualUbuntu
linux-image-virtual-hwe-16.04Ubuntu
Fixed in:4.15.0.129.128USN-4680-1
linux-image-virtual-hwe-18.04Ubuntu
Fixed in:5.4.0.59.65~18.04.54USN-4679-1
linux-image-virtual-hwe-20.04Ubuntu
Fixed in:5.8.0.44.50~20.04.30USN-4751-1
linux-image-virtual-lts-xenialUbuntu
Fixed in:4.4.0.198.173USN-4681-1
linux-kvmUbuntu
linux-lts-xenialUbuntu
Fixed in:4.4.0-198.230~14.04.1USN-4681-1
linux-oracleUbuntu
Fixed in:4.15.0-1062.68~16.04.1USN-4680-1
Fixed in:4.15.0-1062.68USN-4680-1
Fixed in:5.4.0-1034.36USN-4679-1
linux-oracle-5.4Ubuntu
Fixed in:5.4.0-1034.36~18.04.1USN-4679-1
linux-raspiUbuntu
Fixed in:5.4.0-1026.29USN-4679-1
linux-raspi-5.4Ubuntu
Fixed in:5.4.0-1026.29~18.04.1USN-4679-1
linux-raspi2Ubuntu
Fixed in:4.4.0-1143.153USN-4681-1
Fixed in:4.15.0-1077.82USN-4680-1
linux-snapdragonUbuntu
Fixed in:4.4.0-1147.157USN-4681-1
Fixed in:4.15.0-1094.103USN-4680-1
TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works
Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.
CVSS v3 Vector
Exploitability
Attack VectorLocal
Attack ComplexityHigh
Privileges RequiredLow
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Exploit Intelligence
1.03%probability of exploitation in 30 days
60thpercentile
Moderate risk: more likely to be exploited than 60% of all known CVEs.
References
Third-Party Advisory3
Other references3
Related Vulnerabilities
Other CWE-362 (Race Condition) vulnerabilities, ordered by exploit likelihood. View all
| CVE | Severity | CVSS | EPSS | Exploited | Fix |
|---|---|---|---|---|---|
| CVE-2024-6387 | High | 8.1 | 100% | - | Fix |
| CVE-2023-36884 | High | 7.5 | 99% | KEV + Ransom | Fix |
| CVE-2018-15473 | Medium | 5.3 | 99% | - | Fix |
| CVE-2024-27983 | High | 8.2 | 87% | - | Fix |
| CVE-2014-0226 | Medium | 6.8 | 86% | - | Fix |
| CVE-2016-5195 | High | 7.0 | 83% | KEV | Fix |
Common questions
How do I fix CVE-2020-25668?
Published advisories record a fix for 109 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.
Is CVE-2020-25668 being actively exploited?
Not that we know of. CVE-2020-25668 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 1.0% is the estimated probability that it will be exploited in the next 30 days. That is higher than 60% of all scored CVEs.
How severe is CVE-2020-25668?
CVE-2020-25668 has a CVSS v3 base score of 7.0, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.
What does CVE-2020-25668 affect?
Published advisories record a fix for linux (Debian), linux (Ubuntu), linux-aws (Ubuntu), linux-aws-5.4 (Ubuntu), and 105 more. Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.
Embed a live status badge for CVE-2020-25668
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TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.
This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2024-11-21.