Is CVE-2021-4155 in the CISA KEV catalog?

No. CVE-2021-4155 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2021-4155?

CVE-2021-4155 has a CVSS v3 base score of 5.5 (MEDIUM).

What is the EPSS score for CVE-2021-4155?

CVE-2021-4155 has an EPSS score of 0.29% (20th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2021-4155?

Upgrade linux on debian 11 to 5.10.92-1 or later. Fixes are available for 123 affected products.

CVE & CISA-KEV Catalog

CVE-2021-4155

MEDIUM

5.5

CVSS v3

NVD

Description

A data leak flaw was found in the way XFS_IOC_ALLOCSP IOCTL in the XFS filesystem allowed for size increase of files with unaligned size. A local attacker could use this flaw to leak data on the XFS filesystem otherwise not accessible to them.

CWE-131

How to fix

Remediation Available

linuxDebian

Fixed in:5.10.92-1CVE-2021-4155

Fixed in:5.15.15-1CVE-2021-4155

linuxUbuntu

Fixed in:4.4.0-237.271USN-5926-1

Fixed in:4.15.0-169.177USN-5298-1

Fixed in:5.4.0-100.113USN-5294-1

linux-awsUbuntu

Fixed in:4.4.0-1116.122USN-5926-1

Fixed in:4.4.0-1154.169USN-5884-1

Fixed in:4.15.0-1121.129USN-5298-1

Fixed in:5.4.0-1066.69USN-5294-2

linux-aws-5.13Ubuntu

Fixed in:5.13.0-1014.15~20.04.1USN-5295-2

linux-aws-5.4Ubuntu

Fixed in:5.4.0-1066.69~18.04.1USN-5294-2

linux-aws-hweUbuntu

Fixed in:4.15.0-1120.128~16.04.1USN-5298-1

linux-azureUbuntu

Fixed in:4.15.0-1131.144~14.04.1USN-5298-1

Fixed in:4.15.0-1131.144~16.04.1USN-5298-1

Fixed in:5.4.0-1070.73USN-5294-2

linux-azure-4.15Ubuntu

Fixed in:4.15.0-1131.144USN-5298-1

linux-azure-5.4Ubuntu

Fixed in:5.4.0-1070.73~18.04.1USN-5294-2

linux-azure-fdeUbuntu

Fixed in:5.4.0-1070.73+cvm1.1USN-5294-2

linux-bluefieldUbuntu

Fixed in:5.4.0-1028.31USN-5294-2

linux-dell300xUbuntu

Fixed in:4.15.0-1035.40USN-5298-1

linux-gcpUbuntu

Fixed in:4.15.0-1116.130~16.04.1USN-5298-1

Fixed in:5.4.0-1065.69USN-5294-2

linux-gcp-4.15Ubuntu

Fixed in:4.15.0-1116.130USN-5298-1

linux-gcp-5.4Ubuntu

Fixed in:5.4.0-1065.69~18.04.1USN-5294-2

linux-gkeUbuntu

Fixed in:5.4.0-1063.66USN-5297-1

linux-gke-5.4Ubuntu

Fixed in:5.4.0-1063.66~18.04.1USN-5297-1

linux-gkeopUbuntu

Fixed in:5.4.0-1034.35USN-5294-2

linux-gkeop-5.4Ubuntu

Fixed in:5.4.0-1034.35~18.04.1USN-5294-2

linux-hweUbuntu

Fixed in:4.15.0-169.177~16.04.1USN-5298-1

linux-hwe-5.13Ubuntu

Fixed in:5.13.0-30.33~20.04.1USN-5295-1

linux-hwe-5.4Ubuntu

Fixed in:5.4.0-100.113~18.04.1USN-5294-2

linux-ibmUbuntu

Fixed in:5.4.0-1015.16USN-5294-2

linux-ibm-5.4Ubuntu

Fixed in:5.4.0-1015.16~18.04.1USN-5294-2

linux-image-4.15.0-1035-dell300xUbuntu

Fixed in:4.15.0-1035.40USN-5298-1

linux-image-4.15.0-1087-oracleUbuntu

Fixed in:4.15.0-1087.95~16.04.1USN-5298-1

Fixed in:4.15.0-1087.95USN-5298-1

linux-image-4.15.0-1103-raspi2Ubuntu

Fixed in:4.15.0-1103.110USN-5298-1

linux-image-4.15.0-1107-kvmUbuntu

Fixed in:4.15.0-1107.109USN-5298-1

linux-image-4.15.0-1116-gcpUbuntu

Fixed in:4.15.0-1116.130~16.04.1USN-5298-1

Fixed in:4.15.0-1116.130USN-5298-1

linux-image-4.15.0-1120-snapdragonUbuntu

Fixed in:4.15.0-1120.129USN-5298-1

linux-image-4.15.0-1131-azureUbuntu

Fixed in:4.15.0-1131.144~14.04.1USN-5298-1

Fixed in:4.15.0-1131.144~16.04.1USN-5298-1

Fixed in:4.15.0-1131.144USN-5298-1

linux-image-4.15.0-169-genericUbuntu

Fixed in:4.15.0-169.177~16.04.1USN-5298-1

Fixed in:4.15.0-169.177USN-5298-1

linux-image-4.15.0-169-generic-lpaeUbuntu

Fixed in:4.15.0-169.177USN-5298-1

linux-image-4.15.0-169-lowlatencyUbuntu

Fixed in:4.15.0-169.177~16.04.1USN-5298-1

Fixed in:4.15.0-169.177USN-5298-1

linux-image-4.4.0-1116-awsUbuntu

Fixed in:4.4.0-1116.122USN-5926-1

linux-image-4.4.0-1117-kvmUbuntu

Fixed in:4.4.0-1117.127USN-5926-1

linux-image-4.4.0-1154-awsUbuntu

Fixed in:4.4.0-1154.169USN-5884-1

linux-image-4.4.0-237-genericUbuntu

Fixed in:4.4.0-237.271~14.04.1USN-5926-1

Fixed in:4.4.0-237.271+1USN-5926-1

linux-image-4.4.0-237-lowlatencyUbuntu

Fixed in:4.4.0-237.271~14.04.1USN-5926-1

Fixed in:4.4.0-237.271+1USN-5926-1

linux-image-5.13.0-1010-intelUbuntu

Fixed in:5.13.0-1010.10USN-5362-1

linux-image-5.13.0-1014-awsUbuntu

Fixed in:5.13.0-1014.15~20.04.1USN-5295-2

linux-image-5.13.0-1018-oracleUbuntu

Fixed in:5.13.0-1018.22~20.04.1USN-5295-2

linux-image-5.13.0-30-genericUbuntu

Fixed in:5.13.0-30.33~20.04.1USN-5295-1

linux-image-5.13.0-30-generic-64kUbuntu

Fixed in:5.13.0-30.33~20.04.1USN-5295-1

linux-image-5.13.0-30-generic-lpaeUbuntu

Fixed in:5.13.0-30.33~20.04.1USN-5295-1

linux-image-5.13.0-30-lowlatencyUbuntu

Fixed in:5.13.0-30.33~20.04.1USN-5295-1

linux-image-5.14.0-1022-oemUbuntu

Fixed in:5.14.0-1022.24USN-5278-1

linux-image-5.4.0-100-genericUbuntu

Fixed in:5.4.0-100.113~18.04.1USN-5294-2

Fixed in:5.4.0-100.113USN-5294-1

linux-image-5.4.0-100-generic-lpaeUbuntu

Fixed in:5.4.0-100.113~18.04.1USN-5294-2

Fixed in:5.4.0-100.113USN-5294-1

linux-image-5.4.0-100-lowlatencyUbuntu

Fixed in:5.4.0-100.113~18.04.1USN-5294-2

Fixed in:5.4.0-100.113USN-5294-1

linux-image-5.4.0-1015-ibmUbuntu

Fixed in:5.4.0-1015.16~18.04.1USN-5294-2

Fixed in:5.4.0-1015.16USN-5294-2

linux-image-5.4.0-1028-bluefieldUbuntu

Fixed in:5.4.0-1028.31USN-5294-2

linux-image-5.4.0-1034-gkeopUbuntu

Fixed in:5.4.0-1034.35~18.04.1USN-5294-2

Fixed in:5.4.0-1034.35USN-5294-2

linux-image-5.4.0-1053-raspiUbuntu

Fixed in:5.4.0-1053.60~18.04.1USN-5294-2

Fixed in:5.4.0-1053.60USN-5294-2

linux-image-5.4.0-1056-kvmUbuntu

Fixed in:5.4.0-1056.58USN-5294-2

linux-image-5.4.0-1063-gkeUbuntu

Fixed in:5.4.0-1063.66~18.04.1USN-5297-1

Fixed in:5.4.0-1063.66USN-5297-1

linux-image-5.4.0-1064-oracleUbuntu

Fixed in:5.4.0-1064.68~18.04.1USN-5294-2

Fixed in:5.4.0-1064.68USN-5294-2

linux-image-5.4.0-1065-gcpUbuntu

Fixed in:5.4.0-1065.69~18.04.1USN-5294-2

Fixed in:5.4.0-1065.69USN-5294-2

linux-image-5.4.0-1066-awsUbuntu

Fixed in:5.4.0-1066.69USN-5294-2

linux-image-5.4.0-1070-azureUbuntu

Fixed in:5.4.0-1070.73~18.04.1USN-5294-2

Fixed in:5.4.0-1070.73USN-5294-2

linux-image-5.4.0-1070-azure-fdeUbuntu

Fixed in:5.4.0-1070.73+cvm1.1USN-5294-2

linux-image-awsUbuntu

Fixed in:4.4.0.1116.113USN-5926-1

Fixed in:4.4.0.1154.158USN-5884-1

Fixed in:5.4.0.1066.48USN-5294-2

Fixed in:5.13.0.1014.15~20.04.7USN-5295-2

linux-image-aws-hweUbuntu

Fixed in:4.15.0.1120.111USN-5298-1

linux-image-aws-lts-18.04Ubuntu

Fixed in:4.15.0.1121.124USN-5298-1

linux-image-aws-lts-20.04Ubuntu

Fixed in:5.4.0.1066.68USN-5294-2

linux-image-azureUbuntu

Fixed in:4.15.0.1131.104USN-5298-1

Fixed in:4.15.0.1131.122USN-5298-1

Fixed in:5.4.0.1070.49USN-5294-2

linux-image-azure-fdeUbuntu

Fixed in:5.4.0.1070.73+cvm1.16USN-5294-2

linux-image-azure-lts-18.04Ubuntu

Fixed in:4.15.0.1131.104USN-5298-1

linux-image-azure-lts-20.04Ubuntu

Fixed in:5.4.0.1070.68USN-5294-2

linux-image-bluefieldUbuntu

Fixed in:5.4.0.1028.29USN-5294-2

linux-image-dell300xUbuntu

Fixed in:4.15.0.1035.37USN-5298-1

linux-image-gcpUbuntu

Fixed in:4.15.0.1116.117USN-5298-1

Fixed in:5.4.0.1065.50USN-5294-2

linux-image-gcp-lts-18.04Ubuntu

Fixed in:4.15.0.1116.135USN-5298-1

linux-image-gcp-lts-20.04Ubuntu

Fixed in:5.4.0.1065.75USN-5294-2

linux-image-genericUbuntu

Fixed in:4.4.0.237.243USN-5926-1

Fixed in:4.15.0.169.158USN-5298-1

Fixed in:5.4.0.100.104USN-5294-1

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

Fixed in:5.13.0.30.33~20.04.17USN-5295-1

linux-image-generic-hwe-16.04Ubuntu

Fixed in:4.15.0.169.161USN-5298-1

linux-image-generic-hwe-18.04Ubuntu

Fixed in:5.4.0.100.113~18.04.87USN-5294-2

linux-image-generic-hwe-20.04Ubuntu

Fixed in:5.13.0.30.33~20.04.17USN-5295-1

linux-image-generic-lpaeUbuntu

Fixed in:4.15.0.169.158USN-5298-1

Fixed in:5.4.0.100.104USN-5294-1

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

Fixed in:5.4.0.100.113~18.04.87USN-5294-2

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

Fixed in:5.13.0.30.33~20.04.17USN-5295-1

linux-image-generic-lts-xenialUbuntu

Fixed in:4.4.0.237.206USN-5926-1

Fixed in:4.4.0.237.243USN-5926-1

linux-image-gkeUbuntu

Fixed in:4.15.0.1116.117USN-5298-1

Fixed in:5.4.0.1063.73USN-5297-1

linux-image-gke-5.4Ubuntu

Fixed in:5.4.0.1063.66~18.04.27USN-5297-1

Fixed in:5.4.0.1063.73USN-5297-1

linux-image-gkeopUbuntu

Fixed in:5.4.0.1034.37USN-5294-2

linux-image-gkeop-5.4Ubuntu

Fixed in:5.4.0.1034.35~18.04.34USN-5294-2

Fixed in:5.4.0.1034.37USN-5294-2

linux-image-ibmUbuntu

Fixed in:5.4.0.1015.32USN-5294-2

Fixed in:5.4.0.1015.16USN-5294-2

linux-image-ibm-lts-20.04Ubuntu

Fixed in:5.4.0.1015.16USN-5294-2

linux-image-intelUbuntu

Fixed in:5.13.0.1010.11USN-5362-1

linux-image-kvmUbuntu

Fixed in:4.4.0.1117.114USN-5926-1

Fixed in:4.15.0.1107.103USN-5298-1

Fixed in:5.4.0.1056.55USN-5294-2

linux-image-lowlatencyUbuntu

Fixed in:4.4.0.237.243USN-5926-1

Fixed in:4.15.0.169.158USN-5298-1

Fixed in:5.4.0.100.104USN-5294-1

linux-image-lowlatency-hwe-16.04Ubuntu

Fixed in:4.15.0.169.161USN-5298-1

linux-image-lowlatency-hwe-18.04Ubuntu

Fixed in:5.4.0.100.113~18.04.87USN-5294-2

linux-image-lowlatency-hwe-20.04Ubuntu

Fixed in:5.13.0.30.33~20.04.17USN-5295-1

linux-image-lowlatency-lts-xenialUbuntu

Fixed in:4.4.0.237.206USN-5926-1

Fixed in:4.4.0.237.243USN-5926-1

linux-image-oemUbuntu

Fixed in:4.15.0.169.161USN-5298-1

Fixed in:5.4.0.100.113~18.04.87USN-5294-2

Fixed in:5.4.0.100.104USN-5294-1

linux-image-oem-20.04dUbuntu

Fixed in:5.14.0.1022.19USN-5278-1

linux-image-oem-osp1Ubuntu

Fixed in:5.4.0.100.113~18.04.87USN-5294-2

Fixed in:5.4.0.100.104USN-5294-1

linux-image-oracleUbuntu

Fixed in:4.15.0.1087.75USN-5298-1

Fixed in:5.4.0.1064.68~18.04.43USN-5294-2

Fixed in:5.13.0.1018.22~20.04.1USN-5295-2

linux-image-oracle-lts-18.04Ubuntu

Fixed in:4.15.0.1087.97USN-5298-1

linux-image-oracle-lts-20.04Ubuntu

Fixed in:5.4.0.1064.64USN-5294-2

linux-image-raspiUbuntu

Fixed in:5.4.0.1053.87USN-5294-2

linux-image-raspi-hwe-18.04Ubuntu

Fixed in:5.4.0.1053.55USN-5294-2

linux-image-raspi2Ubuntu

Fixed in:4.15.0.1103.101USN-5298-1

Fixed in:5.4.0.1053.87USN-5294-2

linux-image-snapdragonUbuntu

Fixed in:4.15.0.1120.123USN-5298-1

linux-image-snapdragon-hwe-18.04Ubuntu

Fixed in:5.4.0.100.113~18.04.87USN-5294-2

linux-image-virtualUbuntu

Fixed in:4.4.0.237.243USN-5926-1

Fixed in:4.15.0.169.158USN-5298-1

Fixed in:5.4.0.100.104USN-5294-1

linux-image-virtual-hwe-16.04Ubuntu

Fixed in:4.15.0.169.161USN-5298-1

linux-image-virtual-hwe-18.04Ubuntu

Fixed in:5.4.0.100.113~18.04.87USN-5294-2

linux-image-virtual-hwe-20.04Ubuntu

Fixed in:5.13.0.30.33~20.04.17USN-5295-1

linux-image-virtual-lts-xenialUbuntu

Fixed in:4.4.0.237.206USN-5926-1

Fixed in:4.4.0.237.243USN-5926-1

linux-intel-5.13Ubuntu

Fixed in:5.13.0-1010.10USN-5362-1

linux-kvmUbuntu

Fixed in:4.4.0-1117.127USN-5926-1

Fixed in:4.15.0-1107.109USN-5298-1

Fixed in:5.4.0-1056.58USN-5294-2

linux-lts-xenialUbuntu

Fixed in:4.4.0-237.271~14.04.1USN-5926-1

linux-oem-5.14Ubuntu

Fixed in:5.14.0-1022.24USN-5278-1

linux-oracleUbuntu

Fixed in:4.15.0-1087.95~16.04.1USN-5298-1

Fixed in:4.15.0-1087.95USN-5298-1

Fixed in:5.4.0-1064.68USN-5294-2

linux-oracle-5.13Ubuntu

Fixed in:5.13.0-1018.22~20.04.1USN-5295-2

linux-oracle-5.4Ubuntu

Fixed in:5.4.0-1064.68~18.04.1USN-5294-2

linux-raspiUbuntu

Fixed in:5.4.0-1053.60USN-5294-2

linux-raspi-5.4Ubuntu

Fixed in:5.4.0-1053.60~18.04.1USN-5294-2

linux-raspi2Ubuntu

Fixed in:4.15.0-1103.110USN-5298-1

linux-snapdragonUbuntu

Fixed in:4.15.0-1120.129USN-5298-1

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

ScopeUnchanged

Impact

ConfidentialityHigh

IntegrityNone

AvailabilityNone

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

Exploit Intelligence

0.29%probability of exploitation in 30 days

20thpercentile

Low risk: more likely to be exploited than 20% of all known CVEs.

References

Patch2

Mitigation1

access.redhat.com

Third-Party Advisory2

Related Vulnerabilities

Other CWE-131 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-36824	High	7.4	75%	-	Fix
CVE-2020-8450	High	7.3	72%	-	Fix
CVE-2020-6113	High	7.8	69%	-	-
CVE-2026-42945	Critical	8.1	61%	-	Fix
CVE-2020-6116	High	7.8	28%	-	-
CVE-2005-3120	Critical	9.8	23%	-	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.