Is CVE-2020-27675 in the CISA KEV catalog?

No. CVE-2020-27675 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2020-27675?

CVE-2020-27675 has a CVSS v3 base score of 4.7 (MEDIUM).

What is the EPSS score for CVE-2020-27675?

CVE-2020-27675 has an EPSS score of 0.27% (18th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2020-27675?

Upgrade linux on debian 11 to 5.9.6-1 or later. Fixes are available for 109 affected products.

CVE & CISA-KEV Catalog

CVE-2020-27675

MEDIUM

4.7

CVSS v3

NVD

Description

An issue was discovered in the Linux kernel through 5.9.1, as used with Xen through 4.14.x. drivers/xen/events/events_base.c allows event-channel removal during the event-handling loop (a race condition). This can cause a use-after-free or NULL pointer dereference, as demonstrated by a dom0 crash via events for an in-reconfiguration paravirtualized device, aka CID-073d0552ead5.

CWE-362Race Condition CWE-416Use After Free CWE-476NULL Pointer Dereference

How to fix

Remediation Available

linuxDebian

Fixed in:5.9.6-1CVE-2020-27675

linuxUbuntu

Fixed in:4.4.0-198.230USN-4681-1

Fixed in:4.15.0-129.132USN-4680-1

Fixed in:5.4.0-59.65USN-4679-1

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

Fixed in:4.15.0.1091.92USN-4680-1

Fixed in:5.4.0.1033.21USN-4679-1

Fixed in:5.4.0.1033.42USN-4679-1

linux-image-gcp-lts-18.04Ubuntu

Fixed in:4.15.0.1091.109USN-4680-1

linux-image-genericUbuntu

Fixed in:4.4.0.198.204USN-4681-1

Fixed in:4.15.0.129.116USN-4680-1

Fixed in:5.4.0.59.62USN-4679-1

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

Fixed in:4.4.0.198.204USN-4681-1

Fixed in:4.15.0.129.116USN-4680-1

Fixed in:5.4.0.59.62USN-4679-1

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

Fixed in:4.4.0.1085.83USN-4681-1

Fixed in:4.15.0.1082.78USN-4680-1

Fixed in:5.4.0.1031.29USN-4679-1

linux-image-lowlatencyUbuntu

Fixed in:4.4.0.198.204USN-4681-1

Fixed in:4.15.0.129.116USN-4680-1

Fixed in:5.4.0.59.62USN-4679-1

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

Fixed in:4.4.0.1143.143USN-4681-1

Fixed in:4.15.0.1077.74USN-4680-1

Fixed in:5.4.0.1026.61USN-4679-1

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

Fixed in:4.4.0.198.204USN-4681-1

Fixed in:4.15.0.129.116USN-4680-1

Fixed in:5.4.0.59.62USN-4679-1

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

Fixed in:4.4.0-1085.94USN-4681-1

Fixed in:4.15.0-1082.84USN-4680-1

Fixed in:5.4.0-1031.32USN-4679-1

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

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

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

0.27%probability of exploitation in 30 days

18thpercentile

Low risk: more likely to be exploited than 18% of all known CVEs.

References

Patch3

Third-Party Advisory4

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	84%	KEV	Fix

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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.