ghsa-v7qr-4h7w-77cm
Vulnerability from github
In the Linux kernel, the following vulnerability has been resolved:
KVM: x86: Free kvm_cpuid_entry2 array on post-KVM_RUN KVM_SET_CPUID{,2}
Free the "struct kvm_cpuid_entry2" array on successful post-KVM_RUN KVM_SET_CPUID{,2} to fix a memory leak, the callers of kvm_set_cpuid() free the array only on failure.
BUG: memory leak
unreferenced object 0xffff88810963a800 (size 2048):
comm "syz-executor025", pid 3610, jiffies 4294944928 (age 8.080s)
hex dump (first 32 bytes):
00 00 00 00 00 00 00 00 00 00 00 00 0d 00 00 00 ................
47 65 6e 75 6e 74 65 6c 69 6e 65 49 00 00 00 00 GenuntelineI....
backtrace:
[
{
"affected": [],
"aliases": [
"CVE-2022-48764"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2024-06-20T12:15:14Z",
"severity": null
},
"details": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: x86: Free kvm_cpuid_entry2 array on post-KVM_RUN KVM_SET_CPUID{,2}\n\nFree the \"struct kvm_cpuid_entry2\" array on successful post-KVM_RUN\nKVM_SET_CPUID{,2} to fix a memory leak, the callers of kvm_set_cpuid()\nfree the array only on failure.\n\n BUG: memory leak\n unreferenced object 0xffff88810963a800 (size 2048):\n comm \"syz-executor025\", pid 3610, jiffies 4294944928 (age 8.080s)\n hex dump (first 32 bytes):\n 00 00 00 00 00 00 00 00 00 00 00 00 0d 00 00 00 ................\n 47 65 6e 75 6e 74 65 6c 69 6e 65 49 00 00 00 00 GenuntelineI....\n backtrace:\n [\u003cffffffff814948ee\u003e] kmalloc_node include/linux/slab.h:604 [inline]\n [\u003cffffffff814948ee\u003e] kvmalloc_node+0x3e/0x100 mm/util.c:580\n [\u003cffffffff814950f2\u003e] kvmalloc include/linux/slab.h:732 [inline]\n [\u003cffffffff814950f2\u003e] vmemdup_user+0x22/0x100 mm/util.c:199\n [\u003cffffffff8109f5ff\u003e] kvm_vcpu_ioctl_set_cpuid2+0x8f/0xf0 arch/x86/kvm/cpuid.c:423\n [\u003cffffffff810711b9\u003e] kvm_arch_vcpu_ioctl+0xb99/0x1e60 arch/x86/kvm/x86.c:5251\n [\u003cffffffff8103e92d\u003e] kvm_vcpu_ioctl+0x4ad/0x950 arch/x86/kvm/../../../virt/kvm/kvm_main.c:4066\n [\u003cffffffff815afacc\u003e] vfs_ioctl fs/ioctl.c:51 [inline]\n [\u003cffffffff815afacc\u003e] __do_sys_ioctl fs/ioctl.c:874 [inline]\n [\u003cffffffff815afacc\u003e] __se_sys_ioctl fs/ioctl.c:860 [inline]\n [\u003cffffffff815afacc\u003e] __x64_sys_ioctl+0xfc/0x140 fs/ioctl.c:860\n [\u003cffffffff844a3335\u003e] do_syscall_x64 arch/x86/entry/common.c:50 [inline]\n [\u003cffffffff844a3335\u003e] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80\n [\u003cffffffff84600068\u003e] entry_SYSCALL_64_after_hwframe+0x44/0xae",
"id": "GHSA-v7qr-4h7w-77cm",
"modified": "2024-06-20T12:31:22Z",
"published": "2024-06-20T12:31:22Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2022-48764"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/811f95ff95270e6048197821434d9301e3d7f07c"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b9ee734a14bb685b2088f2176d82b34cb4e30dbc"
}
],
"schema_version": "1.4.0",
"severity": []
}