CVSS: 6.7EPSS: 0%CPEs: 1EXPL: 0CVE-2022-2785 – Arbitrary Memory read in BPF Linux Kernel
https://notcve.org/view.php?id=CVE-2022-2785
There exists an arbitrary memory read within the Linux Kernel BPF - Constants provided to fill pointers in structs passed in to bpf_sys_bpf are not verified and can point anywhere, including memory not owned by BPF. An attacker with CAP_BPF can arbitrarily read memory from anywhere on the system. We recommend upgrading past commit 86f44fcec22c Se presenta una lectura de memoria arbitraria dentro del BPF del Kernel de Linux - Las constantes proporcionadas para rellenar los punteros en los structs pasados a bpf_sys_bpf no son verificados y pueden apuntar a cualquier lugar, incluyendo la memoria que no es propiedad de BPF. Un atacante con CAP_BPF puede leer arbitrariamente la memoria de cualquier parte del sistema. Recomendamos actualizar el commit pasado 86f44fcec22c • https://git.kernel.org/bpf/bpf/c/86f44fcec22c https://lore.kernel.org/bpf/20220816205517.682470-1-zhuyifei%40google.com/T/#t • CWE-125: Out-of-bounds Read •
CVSS: 8.7EPSS: 0%CPEs: 22EXPL: 1CVE-2021-22543 – Improper memory handling in Linux KVM
https://notcve.org/view.php?id=CVE-2021-22543
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. Se detectó un problema en Linux: KVM mediante del manejo inapropiado de Los vmas VM_IO|VM_PFNMAP en KVM pueden omitir unas comprobaciones RO y puede conllevar a que las páginas sean liberadas mientras el VMM y el invitado aún pueden acceder a ellas. Esto permite a usuarios con la capacidad de iniciar y controlar una máquina virtual leer y escribir páginas aleatorias de memoria y puede resultar en una escalada de privilegios local A flaw was found in the Linux kernel’s KVM implementation, where improper handing of the VM_IO|VM_PFNMAP VMAs in KVM bypasses RO checks and leads to pages being freed while still accessible by the VMM and guest. This flaw allows users who can start and control a VM to read/write random pages of memory, resulting in local privilege escalation. • http://www.openwall.com/lists/oss-security/2021/06/26/1 https://github.com/google/security-research/security/advisories/GHSA-7wq5-phmq-m584 https://lists.debian.org/debian-lts-announce/2021/10/msg00010.html https://lists.debian.org/debian-lts-announce/2021/12/msg00012.html https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4G5YBUVEPHZYXMKNGBZ3S6INFCTEEL4E https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ROQIXQB7ZAWI3KSGSHR6H5RDUWZI77 • CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer CWE-863: Incorrect Authorization •