CVE & CISA-KEV Catalog

CVE-2021-41073

HIGHEPSS 74th pctl
7.8
CVSS v3
NVD

Description

loop_rw_iter in fs/io_uring.c in the Linux kernel 5.10 through 5.14.6 allows local users to gain privileges by using IORING_OP_PROVIDE_BUFFERS to trigger a free of a kernel buffer, as demonstrated by using /proc/<pid>/maps for exploitation.

CWE-763

How to fix

Remediation Available
linuxDebian
Fixed in:5.10.46-5CVE-2021-41073
Fixed in:5.14.6-2CVE-2021-41073
Fixed in:5.14.6-2CVE-2021-41073
Fixed in:5.14.6-2CVE-2021-41073
linux-aws-5.11Ubuntu
Fixed in:5.11.0-1019.20~20.04.1USN-5092-1
linux-azure-5.11Ubuntu
Fixed in:5.11.0-1017.18~20.04.1USN-5092-2
linux-hwe-5.11Ubuntu
Fixed in:5.11.0-37.41~20.04.2USN-5092-2
linux-image-5.10.0-1049-oemUbuntu
Fixed in:5.10.0-1049.51USN-5106-1
linux-image-5.11.0-1017-azureUbuntu
Fixed in:5.11.0-1017.18~20.04.1USN-5092-2
linux-image-5.11.0-1019-awsUbuntu
Fixed in:5.11.0-1019.20~20.04.1USN-5092-1
linux-image-5.11.0-1019-oracleUbuntu
Fixed in:5.11.0-1019.20~20.04.1USN-5092-2
linux-image-5.11.0-37-genericUbuntu
Fixed in:5.11.0-37.41~20.04.2USN-5092-2
linux-image-5.11.0-37-generic-64kUbuntu
Fixed in:5.11.0-37.41~20.04.2USN-5092-2
linux-image-5.11.0-37-generic-lpaeUbuntu
Fixed in:5.11.0-37.41~20.04.2USN-5092-2
linux-image-5.11.0-37-lowlatencyUbuntu
Fixed in:5.11.0-37.41~20.04.2USN-5092-2
linux-image-5.13.0-1014-oemUbuntu
Fixed in:5.13.0-1014.18USN-5096-1
linux-image-awsUbuntu
Fixed in:5.11.0.1019.20~20.04.18USN-5092-1
linux-image-azure-edgeUbuntu
Fixed in:5.11.0.1017.18~20.04.16USN-5092-2
linux-image-generic-64k-hwe-20.04Ubuntu
Fixed in:5.11.0.37.41~20.04.16USN-5092-2
linux-image-generic-hwe-20.04Ubuntu
Fixed in:5.11.0.37.41~20.04.16USN-5092-2
linux-image-generic-lpae-hwe-20.04Ubuntu
Fixed in:5.11.0.37.41~20.04.16USN-5092-2
linux-image-lowlatency-hwe-20.04Ubuntu
Fixed in:5.11.0.37.41~20.04.16USN-5092-2
linux-image-oem-20.04Ubuntu
Fixed in:5.10.0.1049.51USN-5106-1
linux-image-oem-20.04bUbuntu
Fixed in:5.10.0.1049.51USN-5106-1
linux-image-oem-20.04cUbuntu
Fixed in:5.13.0.1014.18USN-5096-1
linux-image-oracleUbuntu
Fixed in:5.11.0.1019.20~20.04.12USN-5092-2
linux-image-virtual-hwe-20.04Ubuntu
Fixed in:5.11.0.37.41~20.04.16USN-5092-2
linux-oem-5.10Ubuntu
Fixed in:5.10.0-1049.51USN-5106-1
linux-oem-5.13Ubuntu
Fixed in:5.13.0-1014.18USN-5096-1
linux-oracle-5.11Ubuntu
Fixed in:5.11.0-1019.20~20.04.1USN-5092-2

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
IntegrityHigh
AvailabilityHigh

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

Exploit Intelligence

1.69%probability of exploitation in 30 days
74thpercentile

Elevated risk: more likely to be exploited than 74% of all known CVEs.

References

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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.