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Vigil@nce - Linux kernel: buffer overflow via __cgroup_bpf_run_filter_getsockopt

April 2021 by Vigil@nce

This bulletin was written by Vigil@nce : https://vigilance.fr/computer-vulnerability

SYNTHESIS OF THE VULNERABILITY

Impacted products: Fedora, Linux, Ubuntu.

Severity: 2/4.

Consequences: administrator access/rights, denial of service on
server.

Provenance: user shell.

Confidence: confirmed by the editor (5/5).

Creation date: 15/02/2021.

DESCRIPTION OF THE VULNERABILITY

An attacker can trigger a buffer overflow via
__cgroup_bpf_run_filter_getsockopt() of the Linux kernel, in order
to trigger a denial of service, and possibly to run code.

ACCESS TO THE FULL VIGIL@NCE BULLETIN

https://vigilance.fr/vulnerability/Linux-kernel-buffer-overflow-via-cgroup-bpf-run-filter-getsockopt-34579


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