Files

1041 lines
28 KiB
JSON

{
"schema_version": "1.7.0",
"id": "LSN-0081-1",
"summary": "Kernel Live Patch Security Notice",
"details": "Maxim Levitsky discovered that the KVM hypervisor implementation for AMD\nprocessors in the Linux kernel did not properly prevent a guest VM from\nenabling AVIC in nested guest VMs. An attacker in a guest VM could use this\nto write to portions of the host's physical memory.(CVE-2021-3653)\n\nMaxim Levitsky and Paolo Bonzini discovered that the KVM hypervisor\nimplementation for AMD processors in the Linux kernel allowed a guest VM to\ndisable restrictions on VMLOAD/VMSAVE in a nested guest. An attacker in a\nguest VM could use this to read or write portions of the host's physical\nmemory.(CVE-2021-3656)\n\nAndy Nguyen discovered that the netfilter subsystem in the Linux kernel\ncontained an out-of-bounds write in its setsockopt() implementation. A\nlocal attacker could use this to cause a denial of service (system crash)\nor possibly execute arbitrary code.(CVE-2021-22555)\n\nIt was discovered that the virtual file system implementation in the Linux\nkernel contained an unsigned to signed integer conversion error. A local\nattacker could use this to cause a denial of service (system crash) or\nexecute arbitrary code.(CVE-2021-33909)",
"aliases": [],
"upstream": [
"UBUNTU-CVE-2021-3653",
"UBUNTU-CVE-2021-3656",
"UBUNTU-CVE-2021-22555",
"UBUNTU-CVE-2021-33909"
],
"related": [],
"published": "2021-09-13T07:12:04Z",
"modified": "2026-06-03T10:46:31Z",
"affected": [
{
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