CVE-2025-40184

{
  "id": "CVE-2025-40184",
  "cveTags": [],
  "metrics": {},
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "f28f1d02f4eaac05c2ad6bf7264a8696dc21d011",
              "lessThan": "4f7af3d8a1177c807d1f2563c7c171700b020656",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "f28f1d02f4eaac05c2ad6bf7264a8696dc21d011",
              "lessThan": "2ba972bf71cb71d2127ec6c3db1ceb6dd0c73173",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "arch/arm64/kvm/hyp/nvhe/mem_protect.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.16"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "6.16",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.17.4",
              "versionType": "semver",
              "lessThanOrEqual": "6.17.*"
            },
            {
              "status": "unaffected",
              "version": "6.18",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "arch/arm64/kvm/hyp/nvhe/mem_protect.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2025-11-12T22:15:45.207",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/2ba972bf71cb71d2127ec6c3db1ceb6dd0c73173",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/4f7af3d8a1177c807d1f2563c7c171700b020656",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Deferred",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: arm64: Fix debug checking for np-guests using huge mappings\n\nWhen running with transparent huge pages and CONFIG_NVHE_EL2_DEBUG then\nthe debug checking in assert_host_shared_guest() fails on the launch of an\nnp-guest. This WARN_ON() causes a panic and generates the stack below.\n\nIn __pkvm_host_relax_perms_guest() the debug checking assumes the mapping\nis a single page but it may be a block map. Update the checking so that\nthe size is not checked and just assumes the correct size.\n\nWhile we're here make the same fix in __pkvm_host_mkyoung_guest().\n\n  Info: # lkvm run -k /share/arch/arm64/boot/Image -m 704 -c 8 --name guest-128\n  Info: Removed ghost socket file \"/.lkvm//guest-128.sock\".\n[ 1406.521757] kvm [141]: nVHE hyp BUG at: arch/arm64/kvm/hyp/nvhe/mem_protect.c:1088!\n[ 1406.521804] kvm [141]: nVHE call trace:\n[ 1406.521828] kvm [141]:  [<ffff8000811676b4>] __kvm_nvhe_hyp_panic+0xb4/0xe8\n[ 1406.521946] kvm [141]:  [<ffff80008116d12c>] __kvm_nvhe_assert_host_shared_guest+0xb0/0x10c\n[ 1406.522049] kvm [141]:  [<ffff80008116f068>] __kvm_nvhe___pkvm_host_relax_perms_guest+0x48/0x104\n[ 1406.522157] kvm [141]:  [<ffff800081169df8>] __kvm_nvhe_handle___pkvm_host_relax_perms_guest+0x64/0x7c\n[ 1406.522250] kvm [141]:  [<ffff800081169f0c>] __kvm_nvhe_handle_trap+0x8c/0x1a8\n[ 1406.522333] kvm [141]:  [<ffff8000811680fc>] __kvm_nvhe___skip_pauth_save+0x4/0x4\n[ 1406.522454] kvm [141]: ---[ end nVHE call trace ]---\n[ 1406.522477] kvm [141]: Hyp Offset: 0xfffece8013600000\n[ 1406.522554] Kernel panic - not syncing: HYP panic:\n[ 1406.522554] PS:834003c9 PC:0000b1806db6d170 ESR:00000000f2000800\n[ 1406.522554] FAR:ffff8000804be420 HPFAR:0000000000804be0 PAR:0000000000000000\n[ 1406.522554] VCPU:0000000000000000\n[ 1406.523337] CPU: 3 UID: 0 PID: 141 Comm: kvm-vcpu-0 Not tainted 6.16.0-rc7 #97 PREEMPT\n[ 1406.523485] Hardware name: FVP Base RevC (DT)\n[ 1406.523566] Call trace:\n[ 1406.523629]  show_stack+0x18/0x24 (C)\n[ 1406.523753]  dump_stack_lvl+0xd4/0x108\n[ 1406.523899]  dump_stack+0x18/0x24\n[ 1406.524040]  panic+0x3d8/0x448\n[ 1406.524184]  nvhe_hyp_panic_handler+0x10c/0x23c\n[ 1406.524325]  kvm_handle_guest_abort+0x68c/0x109c\n[ 1406.524500]  handle_exit+0x60/0x17c\n[ 1406.524630]  kvm_arch_vcpu_ioctl_run+0x2e0/0x8c0\n[ 1406.524794]  kvm_vcpu_ioctl+0x1a8/0x9cc\n[ 1406.524919]  __arm64_sys_ioctl+0xac/0x104\n[ 1406.525067]  invoke_syscall+0x48/0x10c\n[ 1406.525189]  el0_svc_common.constprop.0+0x40/0xe0\n[ 1406.525322]  do_el0_svc+0x1c/0x28\n[ 1406.525441]  el0_svc+0x38/0x120\n[ 1406.525588]  el0t_64_sync_handler+0x10c/0x138\n[ 1406.525750]  el0t_64_sync+0x1ac/0x1b0\n[ 1406.525876] SMP: stopping secondary CPUs\n[ 1406.525965] Kernel Offset: disabled\n[ 1406.526032] CPU features: 0x0000,00000080,8e134ca1,9446773f\n[ 1406.526130] Memory Limit: none\n[ 1406.959099] ---[ end Kernel panic - not syncing: HYP panic:\n[ 1406.959099] PS:834003c9 PC:0000b1806db6d170 ESR:00000000f2000800\n[ 1406.959099] FAR:ffff8000804be420 HPFAR:0000000000804be0 PAR:0000000000000000\n[ 1406.959099] VCPU:0000000000000000 ]"
    }
  ],
  "lastModified": "2026-06-17T09:21:25.277",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}