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CVE-2021-3489

Description

The eBPF RINGBUF bpf_ringbuf_reserve() function in the Linux kernel did not check that the allocated size was smaller than the ringbuf size, allowing an attacker to perform out-of-bounds writes within the kernel and therefore, arbitrary code execution. This issue was fixed via commit 4b81ccebaeee (bpf, ringbuf: Deny reserve of buffers larger than ringbuf) (v5.13-rc4) and backported to the stable kernels in v5.12.4, v5.11.21, and v5.10.37. It was introduced via 457f44363a88 (bpf: Implement BPF ring buffer and verifier support for it) (v5.8-rc1).

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
0.076

Associated Vulnerability

VulnerabilityOS Platform
Linux kernel for OEM systems (USN-4948-1) linux-image-oem-20.04b_5.10.0.1026.27_amd64.debLinux
Linux kernel for OEM systems (USN-4948-1) linux-image-5.10.0-1026-oem_5.10.0-1026.27_amd64.debLinux
(RHSA-2021:4356) kernel security, bug fix, and enhancement update bpftool-4.18.0-348.el8.x86_64.rpmLinux
(RHSA-2021:4356) kernel security, bug fix, and enhancement update kernel-4.18.0-348.el8.x86_64.rpmLinux
(RHSA-2021:4356) kernel security, bug fix, and enhancement update kernel-abi-stablelists-4.18.0-348.el8.noarch.rpmLinux
(RHSA-2021:4356) kernel security, bug fix, and enhancement update kernel-core-4.18.0-348.el8.x86_64.rpmLinux
(RHSA-2021:4356) kernel security, bug fix, and enhancement update kernel-cross-headers-4.18.0-348.el8.x86_64.rpmLinux
(RHSA-2021:4356) kernel security, bug fix, and enhancement update kernel-debug-4.18.0-348.el8.x86_64.rpmLinux
(RHSA-2021:4356) kernel security, bug fix, and enhancement update kernel-debug-core-4.18.0-348.el8.x86_64.rpmLinux
(RHSA-2021:4356) kernel security, bug fix, and enhancement update kernel-debug-devel-4.18.0-348.el8.x86_64.rpmLinux
(RHSA-2021:4356) kernel security, bug fix, and enhancement update kernel-debug-modules-4.18.0-348.el8.x86_64.rpmLinux
(RHSA-2021:4356) kernel security, bug fix, and enhancement update kernel-debug-modules-extra-4.18.0-348.el8.x86_64.rpmLinux
(RHSA-2021:4356) kernel security, bug fix, and enhancement update kernel-devel-4.18.0-348.el8.x86_64.rpmLinux
(RHSA-2021:4356) kernel security, bug fix, and enhancement update kernel-doc-4.18.0-348.el8.noarch.rpmLinux
(RHSA-2021:4356) kernel security, bug fix, and enhancement update kernel-headers-4.18.0-348.el8.x86_64.rpmLinux
(RHSA-2021:4356) kernel security, bug fix, and enhancement update kernel-modules-4.18.0-348.el8.x86_64.rpmLinux
(RHSA-2021:4356) kernel security, bug fix, and enhancement update kernel-modules-extra-4.18.0-348.el8.x86_64.rpmLinux
(RHSA-2021:4356) kernel security, bug fix, and enhancement update kernel-tools-4.18.0-348.el8.x86_64.rpmLinux
(RHSA-2021:4356) kernel security, bug fix, and enhancement update kernel-tools-libs-4.18.0-348.el8.x86_64.rpmLinux
(RHSA-2021:4356) kernel security, bug fix, and enhancement update perf-4.18.0-348.el8.x86_64.rpmLinux
(RHSA-2021:4356) kernel security, bug fix, and enhancement update python3-perf-4.18.0-348.el8.x86_64.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