安全公告/【CVE-2021-3748】

基本信息

漏洞描述

A use-after-free vulnerability was found in the virtio-net device of QEMU. It could occur when the descriptor's address belongs to the non direct access region, due to num_buffers being set after the virtqueue elem has been unmapped. A malicious guest could use this flaw to crash QEMU, resulting in a denial of service condition, or potentially execute code on the host with the privileges of the QEMU process.

漏洞判定

执行命令yum info PackageName获取软件包版本号，版本小于修复版本，则受此漏洞影响，版本大于等于修复版本，则此漏洞已修复

修复方式

yum update PackageName

参考

https://access.redhat.com/security/cve/CVE-2021-3748 https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3748 https://nvd.nist.gov/vuln/detail/CVE-2021-3748