CVE-2024-55881— KVM: x86: Play nice with protected guests in complete_hypercall_exit()
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I. Basic Information for CVE-2024-55881
Vulnerability Information
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Vulnerability Title
KVM: x86: Play nice with protected guests in complete_hypercall_exit()
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Play nice with protected guests in complete_hypercall_exit() Use is_64_bit_hypercall() instead of is_64_bit_mode() to detect a 64-bit hypercall when completing said hypercall. For guests with protected state, e.g. SEV-ES and SEV-SNP, KVM must assume the hypercall was made in 64-bit mode as the vCPU state needed to detect 64-bit mode is unavailable. Hacking the sev_smoke_test selftest to generate a KVM_HC_MAP_GPA_RANGE hypercall via VMGEXIT trips the WARN: ------------[ cut here ]------------ WARNING: CPU: 273 PID: 326626 at arch/x86/kvm/x86.h:180 complete_hypercall_exit+0x44/0xe0 [kvm] Modules linked in: kvm_amd kvm ... [last unloaded: kvm] CPU: 273 UID: 0 PID: 326626 Comm: sev_smoke_test Not tainted 6.12.0-smp--392e932fa0f3-feat #470 Hardware name: Google Astoria/astoria, BIOS 0.20240617.0-0 06/17/2024 RIP: 0010:complete_hypercall_exit+0x44/0xe0 [kvm] Call Trace: <TASK> kvm_arch_vcpu_ioctl_run+0x2400/0x2720 [kvm] kvm_vcpu_ioctl+0x54f/0x630 [kvm] __se_sys_ioctl+0x6b/0xc0 do_syscall_64+0x83/0x160 entry_SYSCALL_64_after_hwframe+0x76/0x7e </TASK> ---[ end trace 0000000000000000 ]---
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于KVM在处理受保护的客户机时，错误地使用is_64_bit_mode而不是is_64_bit_hypercall来检测64位超调用。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2024-55881
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Same Patch Batch · Linux · 2025-01-11 · 67 CVEs total
| CVE-2024-57793 | virt: tdx-guest: Just leak decrypted memory on unrecoverable errors | |
| CVE-2024-57878 | arm64: ptrace: fix partial SETREGSET for NT_ARM_FPMR | |
| CVE-2024-57877 | arm64: ptrace: fix partial SETREGSET for NT_ARM_POE | |
| CVE-2024-57876 | drm/dp_mst: Fix resetting msg rx state after topology removal | |
| CVE-2024-57806 | btrfs: fix transaction atomicity bug when enabling simple quotas | |
| CVE-2024-57805 | ASoC: SOF: Intel: hda-dai: Do not release the link DMA on STOP | |
| CVE-2024-57804 | scsi: mpi3mr: Fix corrupt config pages PHY state is switched in sysfs | |
| CVE-2024-57800 | ALSA: memalloc: prefer dma_mapping_error() over explicit address checking | |
| CVE-2024-57799 | phy: rockchip: samsung-hdptx: Set drvdata before enabling runtime PM | |
| CVE-2024-57798 | drm/dp_mst: Ensure mst_primary pointer is valid in drm_dp_mst_handle_up_req() | |
| CVE-2024-57807 | scsi: megaraid_sas: Fix for a potential deadlock | |
| CVE-2024-57792 | power: supply: gpio-charger: Fix set charge current limits | |
| CVE-2024-57791 | net/smc: check return value of sock_recvmsg when draining clc data | |
| CVE-2024-56788 | net: ethernet: oa_tc6: fix tx skb race condition between reference pointers | |
| CVE-2024-56372 | net: tun: fix tun_napi_alloc_frags() | |
| CVE-2024-56369 | drm/modes: Avoid divide by zero harder in drm_mode_vrefresh() | |
| CVE-2024-56368 | ring-buffer: Fix overflow in __rb_map_vma | |
| CVE-2024-55916 | Drivers: hv: util: Avoid accessing a ringbuffer not initialized yet | |
| CVE-2024-54193 | accel/ivpu: Fix WARN in ivpu_ipc_send_receive_internal() | |
| CVE-2024-54455 | accel/ivpu: Fix general protection fault in ivpu_bo_list() |
Showing top 20 of 67 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-46333
ptrace: slightly saner 'get_dumpable()' logic - CVE-2026-43490
ksmbd: validate inherited ACE SID length - CVE-2026-43489
liveupdate: luo_file: remember retrieve() status - CVE-2026-43487
ata: libata-core: Disable LPM on ST1000DM010-2EP102 - CVE-2026-43488
usb: xhci: Prevent interrupt storm on host controller error
Same vendor: Linux
- CVE-2026-46333
ptrace: slightly saner 'get_dumpable()' logic - CVE-2026-43490
ksmbd: validate inherited ACE SID length - CVE-2026-43489
liveupdate: luo_file: remember retrieve() status - CVE-2026-43487
ata: libata-core: Disable LPM on ST1000DM010-2EP102 - CVE-2026-43488
usb: xhci: Prevent interrupt storm on host controller error
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