CVE & CISA-KEV Catalog

CVE-2021-26708

HIGHEPSS 73th pctl
7.0
CVSS v3
NVD

Description

A local privilege escalation was discovered in the Linux kernel before 5.10.13. Multiple race conditions in the AF_VSOCK implementation are caused by wrong locking in net/vmw_vsock/af_vsock.c. The race conditions were implicitly introduced in the commits that added VSOCK multi-transport support.

CWE-667

How to fix

Remediation Available
linuxDebian
Fixed in:5.10.13-1CVE-2021-26708
Fixed in:5.10.13-1CVE-2021-26708
Fixed in:5.10.13-1CVE-2021-26708
Fixed in:5.10.13-1CVE-2021-26708
linux-hwe-5.8Ubuntu
Fixed in:5.8.0-43.49~20.04.1USN-4727-1
linux-image-5.6.0-1047-oemUbuntu
Fixed in:5.6.0-1047.51USN-4727-1
linux-image-5.8.0-43-genericUbuntu
Fixed in:5.8.0-43.49~20.04.1USN-4727-1
linux-image-5.8.0-43-generic-lpaeUbuntu
Fixed in:5.8.0-43.49~20.04.1USN-4727-1
linux-image-5.8.0-43-lowlatencyUbuntu
Fixed in:5.8.0-43.49~20.04.1USN-4727-1
linux-image-generic-64k-hwe-20.04Ubuntu
Fixed in:5.8.0.43.49~20.04.29USN-4727-1
linux-image-generic-hwe-20.04Ubuntu
Fixed in:5.8.0.43.49~20.04.29USN-4727-1
linux-image-generic-lpae-hwe-20.04Ubuntu
Fixed in:5.8.0.43.49~20.04.29USN-4727-1
linux-image-lowlatency-hwe-20.04Ubuntu
Fixed in:5.8.0.43.49~20.04.29USN-4727-1
linux-image-oem-20.04Ubuntu
Fixed in:5.6.0.1047.43USN-4727-1
linux-image-virtual-hwe-20.04Ubuntu
Fixed in:5.8.0.43.49~20.04.29USN-4727-1
linux-oem-5.6Ubuntu
Fixed in:5.6.0-1047.51USN-4727-1

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

ConfidentialityHigh
IntegrityHigh
AvailabilityHigh

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

Exploit Intelligence

1.60%probability of exploitation in 30 days
73rdpercentile

Elevated risk: more likely to be exploited than 73% of all known CVEs.

References

Vendor Advisory1
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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.