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CVE-2020-8835

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)

Risk Information

Base Score
7.8
MODERATE
Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS Score
Exploitation Probability
26.55

Associated Vulnerability

VulnerabilityOS Platform
Linux kernel (USN-4313-1) linux-image-aws_5.3.0.1015.17_amd64.debLinux
Linux kernel (USN-4313-1) linux-image-gcp_5.3.0.1016.17_amd64.debLinux
Linux kernel (USN-4313-1) linux-image-gke_5.3.0.1016.17_amd64.debLinux
Linux kernel (USN-4313-1) linux-image-kvm_5.3.0.1014.16_amd64.debLinux
Linux kernel (USN-4313-1) linux-image-azure_5.3.0.1018.37_amd64.debLinux
Linux kernel (USN-4313-1) linux-image-oracle_5.3.0.1013.14_amd64.debLinux
Linux kernel (USN-4313-1) linux-image-generic_5.3.0.45.38_amd64.debLinux
Linux kernel (USN-4313-1) linux-image-gke-5.3_5.3.0.1016.6_amd64.debLinux
Linux kernel (USN-4313-1) linux-image-virtual_5.3.0.45.38_amd64.debLinux
Linux kernel (USN-4313-1) linux-image-gcp-edge_5.3.0.1016.15_amd64.debLinux
Linux kernel (USN-4313-1) linux-image-azure-edge_5.3.0.1018.18_amd64.debLinux
Linux kernel (USN-4313-1) linux-image-lowlatency_5.3.0.45.38_amd64.debLinux
Linux kernel (USN-4313-1) linux-image-oracle-edge_5.3.0.1013.12_amd64.debLinux
Linux kernel (USN-4313-1) linux-image-5.3.0-1014-kvm_5.3.0-1014.15_amd64.debLinux
Linux kernel (USN-4313-1) linux-image-5.3.0-1015-aws_5.3.0-1015.16_amd64.debLinux
Linux kernel (USN-4313-1) linux-image-5.3.0-1016-gcp_5.3.0-1016.17_amd64.debLinux
Linux kernel (USN-4313-1) linux-image-5.3.0-1016-gcp_5.3.0-1016.17~18.04.1_amd64.debLinux
Linux kernel (USN-4313-1) linux-image-5.3.0-1016-gke_5.3.0-1016.17~18.04.1_amd64.debLinux
Linux kernel (USN-4313-1) linux-image-5.3.0-1018-azure_5.3.0-1018.19_amd64.debLinux
Linux kernel (USN-4313-1) linux-image-5.3.0-1018-azure_5.3.0-1018.19~18.04.1_amd64.debLinux
Linux kernel (USN-4313-1) linux-image-5.3.0-45-generic_5.3.0-45.37_amd64.debLinux
Linux kernel (USN-4313-1) linux-image-5.3.0-45-generic_5.3.0-45.37~18.04.1_i386.debLinux
Linux kernel (USN-4313-1) linux-image-5.3.0-45-generic_5.3.0-45.37~18.04.1_amd64.debLinux
Linux kernel (USN-4313-1) linux-image-5.3.0-1013-oracle_5.3.0-1013.14_amd64.debLinux
Linux kernel (USN-4313-1) linux-image-5.3.0-1013-oracle_5.3.0-1013.14~18.04.1_amd64.debLinux
Linux kernel (USN-4313-1) linux-image-generic-hwe-18.04_5.3.0.45.101_i386.debLinux
Linux kernel (USN-4313-1) linux-image-generic-hwe-18.04_5.3.0.45.101_amd64.debLinux
Linux kernel (USN-4313-1) linux-image-virtual-hwe-18.04_5.3.0.45.101_i386.debLinux
Linux kernel (USN-4313-1) linux-image-virtual-hwe-18.04_5.3.0.45.101_amd64.debLinux
Linux kernel (USN-4313-1) linux-image-5.3.0-45-lowlatency_5.3.0-45.37_amd64.debLinux
Linux kernel (USN-4313-1) linux-image-5.3.0-45-lowlatency_5.3.0-45.37~18.04.1_i386.debLinux
Linux kernel (USN-4313-1) linux-image-5.3.0-45-lowlatency_5.3.0-45.37~18.04.1_amd64.debLinux
Linux kernel (USN-4313-1) linux-image-lowlatency-hwe-18.04_5.3.0.45.101_i386.debLinux
Linux kernel (USN-4313-1) linux-image-lowlatency-hwe-18.04_5.3.0.45.101_amd64.debLinux
Kernel-uek update (ELSA-2020-5914) kernel-uek-5.4.17-2036.100.6.1.el8uek.x86_64.rpmLinux
Kernel-uek-debug update (ELSA-2020-5914) kernel-uek-debug-5.4.17-2036.100.6.1.el8uek.x86_64.rpmLinux
Kernel-uek-debug-devel update (ELSA-2020-5914) kernel-uek-debug-devel-5.4.17-2036.100.6.1.el8uek.x86_64.rpmLinux
Kernel-uek-devel update (ELSA-2020-5914) kernel-uek-devel-5.4.17-2036.100.6.1.el8uek.x86_64.rpmLinux
Kernel-uek-doc update (ELSA-2020-5914) kernel-uek-doc-5.4.17-2036.100.6.1.el8uek.noarch.rpmLinux

Patch Details

No records found

References

https://nvd.nist.gov/vuln/detail/CVE-2023-1234
https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-1234