CVE-2021-22543
Improper memory handling in Linux KVM
Vexday Risk Score
21Bajo
Decisión SSVC (CISA)
Track
Sin señal de explotación → monitorear
CVSS 8.7EPSS 0.7%KEV nãoPoC —Nuclei —Metasploit —Patch referenciado
Ciclo de vida
26 may 2021Publicada en NVD
Recomendación: Monitorear — sin señal de explotación por ahora.
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
Productos afectados
Linux Kernel · Linux Kernel¿Quieres saber si tu infraestructura está expuesta a esto?
Hablar con TrueHacking →Referencias
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