# CVE-2022-48764: linux: In the Linux kernel, the following vulnerability has been resolved:  KVM: x86: Free kvm_cpuid_entry2 array on post-KV...

CVE-2022-48764 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-48764, released June 20, 2024. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2022-48764
- Priority: Routine
- CVSS: 5.3 (medium)
- EPSS: 0.0018
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jun 20, 2024

## Description

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:     [<ffffffff814948ee>] kmalloc_node include/linux/slab.h:604 [inline]     [<ffffffff814948ee>] kvmalloc_node+0x3e/0x100 mm/util.c:580     [<ffffffff814950f2>] kvmalloc include/linux/slab.h:732 [inline]     [<ffffffff814950f2>] vmemdup_user+0x22/0x100 mm/util.c:199     [<ffffffff8109f5ff>] kvm_vcpu_ioctl_set_cpuid2+0x8f/0xf0 arch/x86/kvm/cpuid.c:423     [<ffffffff810711b9>] kvm_arch_vcpu_ioctl+0xb99/0x1e60 arch/x86/kvm/x86.c:5251     [<ffffffff8103e92d>] kvm_vcpu_ioctl+0x4ad/0x950 arch/x86/kvm/../../../virt/kvm/kvm_main.c:4066     [<ffffffff815afacc>] vfs_ioctl fs/ioctl.c:51 [inline]     [<ffffffff815afacc>] __do_sys_ioctl fs/ioctl.c:874 [inline]     [<ffffffff815afacc>] __se_sys_ioctl fs/ioctl.c:860 [inline]     [<ffffffff815afacc>] __x64_sys_ioctl+0xfc/0x140 fs/ioctl.c:860     [<ffffffff844a3335>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]     [<ffffffff844a3335>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80     [<ffffffff84600068>] entry_SYSCALL_64_after_hwframe+0x44/0xae

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 5.16.7-1 | [DEBIAN-CVE-2022-48764](https://patchblox.com/security/data/fix/linux/debian-cve-2022-48764.md) | Jun 20, 2024 |
| Linux | linux Debian 13.5 (trixie) | 5.16.7-1 | [DEBIAN-CVE-2022-48764](https://patchblox.com/security/data/fix/linux/debian-cve-2022-48764.md) | Jun 20, 2024 |
| Linux | linux Debian 14 | 5.16.7-1 | [DEBIAN-CVE-2022-48764](https://patchblox.com/security/data/fix/linux/debian-cve-2022-48764.md) | Jun 20, 2024 |

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