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CVE-2025-40184— KVM: arm64: Fix debug checking for np-guests using huge mappings

AI Predicted 5.5 Difficulty: Theoretical EPSS 0.18% · P8

Possible ATT&CK Techniques 1AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 6

VendorProductVersion RangeStatus
LinuxLinuxf28f1d02f4eaac05c2ad6bf7264a8696dc21d011< 4f7af3d8a1177c807d1f2563c7c171700b020656affected
f28f1d02f4eaac05c2ad6bf7264a8696dc21d011< 2ba972bf71cb71d2127ec6c3db1ceb6dd0c73173affected
6.16affected
< 6.16unaffected
6.17.4≤ 6.17.*unaffected
6.18≤ *unaffected
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I. Basic Information for CVE-2025-40184

Vulnerability Information
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Vulnerability Title
KVM: arm64: Fix debug checking for np-guests using huge mappings
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: Fix debug checking for np-guests using huge mappings When running with transparent huge pages and CONFIG_NVHE_EL2_DEBUG then the debug checking in assert_host_shared_guest() fails on the launch of an np-guest. This WARN_ON() causes a panic and generates the stack below. In __pkvm_host_relax_perms_guest() the debug checking assumes the mapping is a single page but it may be a block map. Update the checking so that the size is not checked and just assumes the correct size. While we're here make the same fix in __pkvm_host_mkyoung_guest(). Info: # lkvm run -k /share/arch/arm64/boot/Image -m 704 -c 8 --name guest-128 Info: Removed ghost socket file "/.lkvm//guest-128.sock". [ 1406.521757] kvm [141]: nVHE hyp BUG at: arch/arm64/kvm/hyp/nvhe/mem_protect.c:1088! [ 1406.521804] kvm [141]: nVHE call trace: [ 1406.521828] kvm [141]: [<ffff8000811676b4>] __kvm_nvhe_hyp_panic+0xb4/0xe8 [ 1406.521946] kvm [141]: [<ffff80008116d12c>] __kvm_nvhe_assert_host_shared_guest+0xb0/0x10c [ 1406.522049] kvm [141]: [<ffff80008116f068>] __kvm_nvhe___pkvm_host_relax_perms_guest+0x48/0x104 [ 1406.522157] kvm [141]: [<ffff800081169df8>] __kvm_nvhe_handle___pkvm_host_relax_perms_guest+0x64/0x7c [ 1406.522250] kvm [141]: [<ffff800081169f0c>] __kvm_nvhe_handle_trap+0x8c/0x1a8 [ 1406.522333] kvm [141]: [<ffff8000811680fc>] __kvm_nvhe___skip_pauth_save+0x4/0x4 [ 1406.522454] kvm [141]: ---[ end nVHE call trace ]--- [ 1406.522477] kvm [141]: Hyp Offset: 0xfffece8013600000 [ 1406.522554] Kernel panic - not syncing: HYP panic: [ 1406.522554] PS:834003c9 PC:0000b1806db6d170 ESR:00000000f2000800 [ 1406.522554] FAR:ffff8000804be420 HPFAR:0000000000804be0 PAR:0000000000000000 [ 1406.522554] VCPU:0000000000000000 [ 1406.523337] CPU: 3 UID: 0 PID: 141 Comm: kvm-vcpu-0 Not tainted 6.16.0-rc7 #97 PREEMPT [ 1406.523485] Hardware name: FVP Base RevC (DT) [ 1406.523566] Call trace: [ 1406.523629] show_stack+0x18/0x24 (C) [ 1406.523753] dump_stack_lvl+0xd4/0x108 [ 1406.523899] dump_stack+0x18/0x24 [ 1406.524040] panic+0x3d8/0x448 [ 1406.524184] nvhe_hyp_panic_handler+0x10c/0x23c [ 1406.524325] kvm_handle_guest_abort+0x68c/0x109c [ 1406.524500] handle_exit+0x60/0x17c [ 1406.524630] kvm_arch_vcpu_ioctl_run+0x2e0/0x8c0 [ 1406.524794] kvm_vcpu_ioctl+0x1a8/0x9cc [ 1406.524919] __arm64_sys_ioctl+0xac/0x104 [ 1406.525067] invoke_syscall+0x48/0x10c [ 1406.525189] el0_svc_common.constprop.0+0x40/0xe0 [ 1406.525322] do_el0_svc+0x1c/0x28 [ 1406.525441] el0_svc+0x38/0x120 [ 1406.525588] el0t_64_sync_handler+0x10c/0x138 [ 1406.525750] el0t_64_sync+0x1ac/0x1b0 [ 1406.525876] SMP: stopping secondary CPUs [ 1406.525965] Kernel Offset: disabled [ 1406.526032] CPU features: 0x0000,00000080,8e134ca1,9446773f [ 1406.526130] Memory Limit: none [ 1406.959099] ---[ end Kernel panic - not syncing: HYP panic: [ 1406.959099] PS:834003c9 PC:0000b1806db6d170 ESR:00000000f2000800 [ 1406.959099] FAR:ffff8000804be420 HPFAR:0000000000804be0 PAR:0000000000000000 [ 1406.959099] VCPU:0000000000000000 ]
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
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np-guest调试检查错误处理大页映射，可能导致内核崩溃。
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

VendorProductAffected VersionsCPESubscribe
LinuxLinux f28f1d02f4eaac05c2ad6bf7264a8696dc21d011 ~ 4f7af3d8a1177c807d1f2563c7c171700b020656 -
LinuxLinux 6.16 -

II. Public POCs for CVE-2025-40184

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III. Intelligence Information for CVE-2025-40184

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Same Patch Batch · Linux · 2025-11-12 · 96 CVEs total

CVE-2025-401769.8 CRITICALtls: wait for pending async decryptions if tls_strp_msg_hold fails
CVE-2025-401408.8 HIGHnet: usb: Remove disruptive netif_wake_queue in rtl8150_set_multicast
CVE-2025-401338.1 HIGHmptcp: Use __sk_dst_get() and dst_dev_rcu() in mptcp_active_enable().
CVE-2025-402048.1 HIGHsctp: Fix MAC comparison to be constant-time
CVE-2025-401688.1 HIGHsmc: Use __sk_dst_get() and dst_dev_rcu() in smc_clc_prfx_match().
CVE-2025-401588.1 HIGHipv6: use RCU in ip6_output()
CVE-2025-401358.1 HIGHipv6: use RCU in ip6_xmit()
CVE-2025-401868.1 HIGHtcp: Don't call reqsk_fastopen_remove() in tcp_conn_request().
CVE-2025-401418.0 HIGHBluetooth: ISO: Fix possible UAF on iso_conn_free
CVE-2025-401677.8 HIGHext4: detect invalid INLINE_DATA + EXTENTS flag combination
CVE-2025-401597.8 HIGHxsk: Harden userspace-supplied xdp_desc validation
CVE-2025-401667.8 HIGHdrm/xe/guc: Check GuC running state before deregistering exec queue
CVE-2025-401657.8 HIGHmedia: nxp: imx8-isi: m2m: Fix streaming cleanup on release
CVE-2025-401517.8 HIGHLoongArch: BPF: No support of struct argument in trampoline programs
CVE-2025-401497.8 HIGHtls: Use __sk_dst_get() and dst_dev_rcu() in get_netdev_for_sock().
CVE-2025-401727.8 HIGHaccel/qaic: Treat remaining == 0 as error in find_and_map_user_pages()
CVE-2025-401697.8 HIGHbpf: Reject negative offsets for ALU ops
CVE-2025-402017.8 HIGHkernel/sys.c: fix the racy usage of task_lock(tsk->group_leader) in sys_prlimit64() paths
CVE-2025-402037.8 HIGHlistmount: don't call path_put() under namespace semaphore
CVE-2025-402057.8 HIGHbtrfs: avoid potential out-of-bounds in btrfs_encode_fh()

Showing top 20 of 96 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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