Improper memory handling in Linux KVM
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.7epss 0.7%
exploitation probability
0.7%top 52% of all CVEs
observed exploitation
nono source reports it
An issue was discovered in Linux: KVM through Improper handling of VM_IO|VM_PFNMAP vmas in KVM can bypass RO checks and can lead to pages being freed while still accessible by the VMM and guest. This allows users with the ability to start and control a VM to read/write random pages of memory and can result in local privilege escalation.
CVSS:4.0/AV:L/AC:H/AT:N/PR:L/UI:N/VC:H/VI:H/VA:L/SC:H/SI:H/SA:L
Affected products
Linux Kernel · Linux KernelReferences
https://github.com/google/security-research/security/advisories/GHSA-7wq5-phmq-m584https://lists.debian.org/debian-lts-announce/2021/10/msg00010.htmlhttps://lists.debian.org/debian-lts-announce/2021/12/msg00012.htmlhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4G5YBUVEPHZYXMKNGBZ3S6INFCTEEL4E/https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ROQIXQB7ZAWI3KSGSHR6H5RDUWZI775S/https://security.netapp.com/advisory/ntap-20210708-0002/http://www.openwall.com/lists/oss-security/2021/06/26/1