CVE & CISA-KEV Catalog

CVE-2020-8835

HIGHEPSS 93th pctl
7.8
CVSS v3
NVD

Description

In the Linux kernel 5.5.0 and newer, the bpf verifier (kernel/bpf/verifier.c) did not properly restrict the register bounds for 32-bit operations, leading to out-of-bounds reads and writes in kernel memory. The vulnerability also affects the Linux 5.4 stable series, starting with v5.4.7, as the introducing commit was backported to that branch. This vulnerability was fixed in 5.6.1, 5.5.14, and 5.4.29. (issue is aka ZDI-CAN-10780)

CWE-125Out-of-bounds ReadCWE-787Out-of-bounds Write

How to fix

Remediation Available
linuxDebian
Fixed in:5.5.13-2CVE-2020-8835
Fixed in:5.5.13-2CVE-2020-8835
Fixed in:5.5.13-2CVE-2020-8835
Fixed in:5.5.13-2CVE-2020-8835
linux-azure-5.3Ubuntu
Fixed in:5.3.0-1018.19~18.04.1USN-4313-1
linux-gcp-5.3Ubuntu
Fixed in:5.3.0-1016.17~18.04.1USN-4313-1
linux-gke-5.3Ubuntu
Fixed in:5.3.0-1016.17~18.04.1USN-4313-1
linux-hweUbuntu
Fixed in:5.3.0-45.37~18.04.1USN-4313-1
linux-image-5.3.0-1013-oracleUbuntu
Fixed in:5.3.0-1013.14~18.04.1USN-4313-1
linux-image-5.3.0-1016-gcpUbuntu
Fixed in:5.3.0-1016.17~18.04.1USN-4313-1
linux-image-5.3.0-1016-gkeUbuntu
Fixed in:5.3.0-1016.17~18.04.1USN-4313-1
linux-image-5.3.0-1018-azureUbuntu
Fixed in:5.3.0-1018.19~18.04.1USN-4313-1
linux-image-5.3.0-1021-raspi2Ubuntu
Fixed in:5.3.0-1021.23~18.04.1USN-4313-1
linux-image-5.3.0-45-genericUbuntu
Fixed in:5.3.0-45.37~18.04.1USN-4313-1
linux-image-5.3.0-45-generic-lpaeUbuntu
Fixed in:5.3.0-45.37~18.04.1USN-4313-1
linux-image-5.3.0-45-lowlatencyUbuntu
Fixed in:5.3.0-45.37~18.04.1USN-4313-1
linux-image-azure-edgeUbuntu
Fixed in:5.3.0.1018.18USN-4313-1
linux-image-gcp-edgeUbuntu
Fixed in:5.3.0.1016.15USN-4313-1
linux-image-generic-hwe-18.04Ubuntu
Fixed in:5.3.0.45.101USN-4313-1
linux-image-generic-lpae-hwe-18.04Ubuntu
Fixed in:5.3.0.45.101USN-4313-1
linux-image-gke-5.3Ubuntu
Fixed in:5.3.0.1016.6USN-4313-1
linux-image-lowlatency-hwe-18.04Ubuntu
Fixed in:5.3.0.45.101USN-4313-1
linux-image-oracle-edgeUbuntu
Fixed in:5.3.0.1013.12USN-4313-1
linux-image-raspi2-hwe-18.04Ubuntu
Fixed in:5.3.0.1021.10USN-4313-1
linux-image-snapdragon-hwe-18.04Ubuntu
Fixed in:5.3.0.45.101USN-4313-1
linux-image-virtual-hwe-18.04Ubuntu
Fixed in:5.3.0.45.101USN-4313-1
linux-oracle-5.3Ubuntu
Fixed in:5.3.0-1013.14~18.04.1USN-4313-1
linux-raspi2-5.3Ubuntu
Fixed in:5.3.0-1021.23~18.04.1USN-4313-1

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
ScopeChanged

Impact

ConfidentialityHigh
IntegrityHigh
AvailabilityHigh

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

Exploit Intelligence

6.06%probability of exploitation in 30 days
93rdpercentile

High risk: more likely to be exploited than 93% of all known CVEs.

References

Exploit1

Related Vulnerabilities

Other CWE-125 (Out-of-bounds Read) vulnerabilities, ordered by exploit likelihood. View all

CVESeverityCVSSEPSSExploitedFix
CVE-2014-0160High7.5100%KEVFix
CVE-2025-5777High7.5100%KEV + RansomFix
CVE-2021-4034High7.895%KEVFix
CVE-2023-21769High7.592%-Fix
CVE-2023-49285High8.689%-Fix
CVE-2020-8794Critical9.889%-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.