Is CVE-2021-3492 in the CISA KEV catalog?

No. CVE-2021-3492 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-3492?

CVE-2021-3492 has a CVSS v3 base score of 8.8 (HIGH).

What is the EPSS score for CVE-2021-3492?

CVE-2021-3492 has an EPSS score of 1.55% (72th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-3492?

Upgrade gcp on ubuntu 20.04 to 5.4.0-1009 or later. Fixes are available for 82 affected products.

CVE & CISA-KEV Catalog

CVE-2021-3492

HIGHEPSS 72th pctl

8.8

CVSS v3

NVD

Description

Shiftfs, an out-of-tree stacking file system included in Ubuntu Linux kernels, did not properly handle faults occurring during copy_from_user() correctly. These could lead to either a double-free situation or memory not being freed at all. An attacker could use this to cause a denial of service (kernel memory exhaustion) or gain privileges via executing arbitrary code. AKA ZDI-CAN-13562.

CWE-401Missing Release of Memory (Memory Leak)CWE-415

How to fix

Remediation Available

gcpUbuntu

Fixed in:5.4.0-1009LSN-0077-1

generic-5.4Ubuntu

Fixed in:5.4.0-26LSN-0077-1

gkeUbuntu

Fixed in:5.4.0-1033LSN-0077-1

gke-5.4Ubuntu

Fixed in:5.4.0-1009LSN-0077-1

gkeopUbuntu

Fixed in:5.4.0-1009LSN-0077-1

gkeop-5.4Ubuntu

Fixed in:5.4.0-1007LSN-0077-1

linuxUbuntu

Fixed in:5.4.0-72.80USN-4917-1

linux-awsUbuntu

Fixed in:5.4.0-1045.47USN-4917-1

linux-aws-5.4Ubuntu

Fixed in:5.4.0-1045.47~18.04.1USN-4917-1

linux-azureUbuntu

Fixed in:5.4.0-1046.48USN-4917-1

linux-azure-5.4Ubuntu

Fixed in:5.4.0-1046.48~18.04.1USN-4917-1

linux-gcpUbuntu

Fixed in:5.4.0-1042.45USN-4917-1

linux-gcp-5.4Ubuntu

Fixed in:5.4.0-1042.45~18.04.1USN-4917-1

linux-gke-5.3Ubuntu

Fixed in:5.3.0-1042.45USN-4917-1

linux-gke-5.4Ubuntu

Fixed in:5.4.0-1042.44~18.04.1USN-4917-1

linux-gkeopUbuntu

Fixed in:5.4.0-1014.15USN-4917-1

linux-gkeop-5.4Ubuntu

Fixed in:5.4.0-1014.15~18.04.1USN-4917-1

linux-hweUbuntu

Fixed in:5.3.0-73.69USN-4917-1

linux-hwe-5.4Ubuntu

Fixed in:5.4.0-72.80~18.04.1USN-4917-1

linux-hwe-5.8Ubuntu

Fixed in:5.8.0-50.56~20.04.1USN-4917-1

linux-image-5.10.0-1022-oemUbuntu

Fixed in:5.10.0-1022.23USN-4917-1

linux-image-5.3.0-1039-raspi2Ubuntu

Fixed in:5.3.0-1039.41USN-4917-1

linux-image-5.3.0-1042-gkeUbuntu

Fixed in:5.3.0-1042.45USN-4917-1

linux-image-5.3.0-73-genericUbuntu

Fixed in:5.3.0-73.69USN-4917-1

linux-image-5.3.0-73-lowlatencyUbuntu

Fixed in:5.3.0-73.69USN-4917-1

linux-image-5.4.0-1014-gkeopUbuntu

Fixed in:5.4.0-1014.15~18.04.1USN-4917-1

Fixed in:5.4.0-1014.15USN-4917-1

linux-image-5.4.0-1034-raspiUbuntu

Fixed in:5.4.0-1034.37~18.04.1USN-4917-1

Fixed in:5.4.0-1034.37USN-4917-1

linux-image-5.4.0-1038-kvmUbuntu

Fixed in:5.4.0-1038.39USN-4917-1

linux-image-5.4.0-1042-gcpUbuntu

Fixed in:5.4.0-1042.45~18.04.1USN-4917-1

Fixed in:5.4.0-1042.45USN-4917-1

linux-image-5.4.0-1042-gkeUbuntu

Fixed in:5.4.0-1042.44~18.04.1USN-4917-1

linux-image-5.4.0-1043-oracleUbuntu

Fixed in:5.4.0-1043.46~18.04.1USN-4917-1

Fixed in:5.4.0-1043.46USN-4917-1

linux-image-5.4.0-1045-awsUbuntu

Fixed in:5.4.0-1045.47~18.04.1USN-4917-1

Fixed in:5.4.0-1045.47USN-4917-1

linux-image-5.4.0-1046-azureUbuntu

Fixed in:5.4.0-1046.48~18.04.1USN-4917-1

Fixed in:5.4.0-1046.48USN-4917-1

linux-image-5.4.0-72-genericUbuntu

Fixed in:5.4.0-72.80~18.04.1USN-4917-1

Fixed in:5.4.0-72.80USN-4917-1

linux-image-5.4.0-72-generic-lpaeUbuntu

Fixed in:5.4.0-72.80~18.04.1USN-4917-1

Fixed in:5.4.0-72.80USN-4917-1

linux-image-5.4.0-72-lowlatencyUbuntu

Fixed in:5.4.0-72.80~18.04.1USN-4917-1

Fixed in:5.4.0-72.80USN-4917-1

linux-image-5.6.0-1054-oemUbuntu

Fixed in:5.6.0-1054.58USN-4915-1

linux-image-5.8.0-50-genericUbuntu

Fixed in:5.8.0-50.56~20.04.1USN-4917-1

linux-image-5.8.0-50-generic-64kUbuntu

Fixed in:5.8.0-50.56~20.04.1USN-4917-1

linux-image-5.8.0-50-generic-lpaeUbuntu

Fixed in:5.8.0-50.56~20.04.1USN-4917-1

linux-image-5.8.0-50-lowlatencyUbuntu

Fixed in:5.8.0-50.56~20.04.1USN-4917-1

linux-image-awsUbuntu

Fixed in:5.4.0.1045.27USN-4917-1

Fixed in:5.4.0.1045.46USN-4917-1

linux-image-azureUbuntu

Fixed in:5.4.0.1046.25USN-4917-1

Fixed in:5.4.0.1046.44USN-4917-1

linux-image-gcpUbuntu

Fixed in:5.4.0.1042.29USN-4917-1

Fixed in:5.4.0.1042.51USN-4917-1

linux-image-genericUbuntu

Fixed in:5.4.0.72.75USN-4917-1

linux-image-generic-64k-hwe-20.04Ubuntu

Fixed in:5.8.0.50.56~20.04.34USN-4917-1

linux-image-generic-hwe-18.04Ubuntu

Fixed in:5.4.0.72.80~18.04.65USN-4917-1

linux-image-generic-hwe-20.04Ubuntu

Fixed in:5.8.0.50.56~20.04.34USN-4917-1

linux-image-generic-lpaeUbuntu

Fixed in:5.4.0.72.75USN-4917-1

linux-image-generic-lpae-hwe-18.04Ubuntu

Fixed in:5.4.0.72.80~18.04.65USN-4917-1

linux-image-generic-lpae-hwe-20.04Ubuntu

Fixed in:5.8.0.50.56~20.04.34USN-4917-1

linux-image-gke-5.3Ubuntu

Fixed in:5.3.0.1042.25USN-4917-1

linux-image-gke-5.4Ubuntu

Fixed in:5.4.0.1042.44~18.04.8USN-4917-1

linux-image-gkeopUbuntu

Fixed in:5.4.0.1014.17USN-4917-1

linux-image-gkeop-5.3Ubuntu

Fixed in:5.3.0.73.130USN-4917-1

linux-image-gkeop-5.4Ubuntu

Fixed in:5.4.0.1014.15~18.04.15USN-4917-1

Fixed in:5.4.0.1014.17USN-4917-1

linux-image-kvmUbuntu

Fixed in:5.4.0.1038.36USN-4917-1

linux-image-lowlatencyUbuntu

Fixed in:5.4.0.72.75USN-4917-1

linux-image-lowlatency-hwe-18.04Ubuntu

Fixed in:5.4.0.72.80~18.04.65USN-4917-1

linux-image-lowlatency-hwe-20.04Ubuntu

Fixed in:5.8.0.50.56~20.04.34USN-4917-1

linux-image-oemUbuntu

Fixed in:5.4.0.72.80~18.04.65USN-4917-1

Fixed in:5.4.0.72.75USN-4917-1

linux-image-oem-20.04Ubuntu

Fixed in:5.6.0.1054.50USN-4915-1

linux-image-oem-20.04bUbuntu

Fixed in:5.10.0.1022.23USN-4917-1

linux-image-oem-osp1Ubuntu

Fixed in:5.4.0.72.80~18.04.65USN-4917-1

Fixed in:5.4.0.72.75USN-4917-1

linux-image-oracleUbuntu

Fixed in:5.4.0.1043.46~18.04.25USN-4917-1

Fixed in:5.4.0.1043.40USN-4917-1

linux-image-raspiUbuntu

Fixed in:5.4.0.1034.69USN-4917-1

linux-image-raspi-hwe-18.04Ubuntu

Fixed in:5.4.0.1034.36USN-4917-1

linux-image-raspi2Ubuntu

Fixed in:5.4.0.1034.69USN-4917-1

linux-image-raspi2-hwe-18.04Ubuntu

Fixed in:5.3.0.1039.28USN-4917-1

linux-image-snapdragon-hwe-18.04Ubuntu

Fixed in:5.4.0.72.80~18.04.65USN-4917-1

linux-image-virtualUbuntu

Fixed in:5.4.0.72.75USN-4917-1

linux-image-virtual-hwe-18.04Ubuntu

Fixed in:5.4.0.72.80~18.04.65USN-4917-1

linux-image-virtual-hwe-20.04Ubuntu

Fixed in:5.8.0.50.56~20.04.34USN-4917-1

linux-kvmUbuntu

Fixed in:5.4.0-1038.39USN-4917-1

linux-oem-5.10Ubuntu

Fixed in:5.10.0-1022.23USN-4917-1

linux-oem-5.6Ubuntu

Fixed in:5.6.0-1054.58USN-4915-1

linux-oracleUbuntu

Fixed in:5.4.0-1043.46USN-4917-1

linux-oracle-5.4Ubuntu

Fixed in:5.4.0-1043.46~18.04.1USN-4917-1

linux-raspiUbuntu

Fixed in:5.4.0-1034.37USN-4917-1

linux-raspi-5.4Ubuntu

Fixed in:5.4.0-1034.37~18.04.1USN-4917-1

linux-raspi2-5.3Ubuntu

Fixed in:5.3.0-1039.41USN-4917-1

lowlatency-5.4Ubuntu

Fixed in:5.4.0-26LSN-0077-1

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 ComplexityLow

Privileges RequiredLow

User InteractionNone

ScopeChanged

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Exploit Intelligence

1.55%probability of exploitation in 30 days

72ndpercentile

Elevated risk: more likely to be exploited than 72% of all known CVEs.

References

Patch2

Vendor Advisory1

ubuntu.com

Third-Party Advisory3

Related Vulnerabilities

Other CWE-401 (Missing Release of Memory (Memory Leak)) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2020-13934	High	7.5	64%	-	Fix
CVE-2016-6304	High	7.5	63%	-	Fix
CVE-2019-12265	Medium	5.3	55%	-	Fix
CVE-2001-0136	Medium	5.0	45%	-	-
CVE-2016-4232	High	7.5	36%	-	-
CVE-2001-0543	Medium	5.0	21%	-	-

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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.