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CVE-2021-4158

Status Candidate

Overview

A NULL pointer dereference issue was found in the ACPI code of QEMU. A malicious, privileged user within the guest could use this flaw to crash the QEMU process on the host, resulting in a denial of service condition.

Related Files

Red Hat Security Advisory 2022-7967-01
Posted Nov 15, 2022
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2022-7967-01 - Kernel-based Virtual Machine is a full virtualization solution for Linux on a variety of architectures. The qemu-kvm packages provide the user-space component for running virtual machines that use KVM. Issues addressed include buffer overflow, bypass, null pointer, and use-after-free vulnerabilities.

tags | advisory, overflow, kernel, vulnerability
systems | linux, redhat
advisories | CVE-2021-3507, CVE-2021-3611, CVE-2021-3750, CVE-2021-4158
SHA-256 | e5b756fa88106520e91abca563e807d16bb838880fef65956bfd26e61dc8090a
Ubuntu Security Notice USN-5307-1
Posted Feb 28, 2022
Authored by Ubuntu | Site security.ubuntu.com

Ubuntu Security Notice 5307-1 - Gaoning Pan discovered that QEMU incorrectly handled the floppy disk emulator. An attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service. Gaoning Pan discovered that the QEMU vmxnet3 NIC emulator incorrectly handled certain values. An attacker inside the guest could use this issue to cause QEMU to crash, resulting in a denial of service. It was discovered that the QEMU vhost-user GPU device contained several security issues. An attacker inside the guest could use these issues to cause QEMU to crash, resulting in a denial of service, leak sensitive information, or possibly execute arbitrary code. This issue only affected Ubuntu 21.10.

tags | advisory, denial of service, arbitrary
systems | linux, ubuntu
advisories | CVE-2021-20196, CVE-2021-20203, CVE-2021-3546, CVE-2021-3682, CVE-2021-3713, CVE-2021-3748, CVE-2021-3930, CVE-2021-4158, CVE-2022-0358
SHA-256 | 93c74c6aff190d655abe77b615cbb1fdb9e7fd27501547e3980eeee5e03af9e9
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