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CVE-2021-4145

Status Candidate

Overview

A NULL pointer dereference issue was found in the block mirror layer of QEMU in versions prior to 6.2.0. The `self` pointer is dereferenced in mirror_wait_on_conflicts() without ensuring that it's not NULL. A malicious unprivileged user within the guest could use this flaw to crash the QEMU process on the host when writing data reaches the threshold of mirroring node.

Related Files

Red Hat Security Advisory 2022-1759-01
Posted May 11, 2022
Authored by Red Hat | Site access.redhat.com

Red Hat Security Advisory 2022-1759-01 - Kernel-based Virtual Machine offers a full virtualization solution for Linux on numerous hardware platforms. The virt:rhel module contains packages which provide user-space components used to run virtual machines using KVM. The packages also provide APIs for managing and interacting with the virtualized systems. Issues addressed include buffer overflow, integer overflow, null pointer, out of bounds access, out of bounds read, and use-after-free vulnerabilities.

tags | advisory, overflow, kernel, vulnerability
systems | linux, redhat
advisories | CVE-2021-20196, CVE-2021-33285, CVE-2021-33286, CVE-2021-33287, CVE-2021-33289, CVE-2021-35266, CVE-2021-35267, CVE-2021-35268, CVE-2021-35269, CVE-2021-3622, CVE-2021-3716, CVE-2021-3748, CVE-2021-39251, CVE-2021-39252, CVE-2021-39253, CVE-2021-39254, CVE-2021-39255, CVE-2021-39256, CVE-2021-39257, CVE-2021-39258, CVE-2021-39259, CVE-2021-39260, CVE-2021-39261, CVE-2021-39262, CVE-2021-39263, CVE-2021-3975, CVE-2021-4145
SHA-256 | cf2c26724e7650e1aeb0964cd78478438588a1ed37ddff36eb738dc4866cc442
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