CVE-2024-53196

/// Technical description

In the Linux kernel, the following vulnerability has been resolved:

KVM: arm64: Don't retire aborted MMIO instruction

Returning an abort to the guest for an unsupported MMIO access is a

documented feature of the KVM UAPI. Nevertheless, it's clear that this

plumbing has seen limited testing, since userspace can trivially cause a

WARN in the MMIO return:

WARNING: CPU: 0 PID: 30558 at arch/arm64/include/asm/kvm_emulate.h:536 kvm_handle_mmio_return+0x46c/0x5c4 arch/arm64/include/asm/kvm_emulate.h:536

Call trace:

kvm_handle_mmio_return+0x46c/0x5c4 arch/arm64/include/asm/kvm_emulate.h:536

kvm_arch_vcpu_ioctl_run+0x98/0x15b4 arch/arm64/kvm/arm.c:1133

kvm_vcpu_ioctl+0x75c/0xa78 virt/kvm/kvm_main.c:4487

__do_sys_ioctl fs/ioctl.c:51 [inline]

__se_sys_ioctl fs/ioctl.c:893 [inline]

__arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:893

__invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]

invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:49

el0_svc_common+0x1e0/0x23c

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References