{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2024-55881",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2024-55881"
  ],
  "published": "2025-01-11T12:37:33Z",
  "summary": "KVM: x86: Play nice with protected guests in complete_hypercall_exit()",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: x86: Play nice with protected guests in complete_hypercall_exit()\n\nUse is_64_bit_hypercall() instead of is_64_bit_mode() to detect a 64-bit\nhypercall when completing said hypercall.  For guests with protected state,\ne.g. SEV-ES and SEV-SNP, KVM must assume the hypercall was made in 64-bit\nmode as the vCPU state needed to detect 64-bit mode is unavailable.\n\nHacking the sev_smoke_test selftest to generate a KVM_HC_MAP_GPA_RANGE\nhypercall via VMGEXIT trips the WARN:\n\n  ------------[ cut here ]------------\n  WARNING: CPU: 273 PID: 326626 at arch/x86/kvm/x86.h:180 complete_hypercall_exit+0x44/0xe0 [kvm]\n  Modules linked in: kvm_amd kvm ... [last unloaded: kvm]\n  CPU: 273 UID: 0 PID: 326626 Comm: sev_smoke_test Not tainted 6.12.0-smp--392e932fa0f3-feat #470\n  Hardware name: Google Astoria/astoria, BIOS 0.20240617.0-0 06/17/2024\n  RIP: 0010:complete_hypercall_exit+0x44/0xe0 [kvm]\n  Call Trace:\n   <TASK>\n   kvm_arch_vcpu_ioctl_run+0x2400/0x2720 [kvm]\n   kvm_vcpu_ioctl+0x54f/0x630 [kvm]\n   __se_sys_ioctl+0x6b/0xc0\n   do_syscall_64+0x83/0x160\n   entry_SYSCALL_64_after_hwframe+0x76/0x7e\n   </TASK>\n  ---[ end trace 0000000000000000 ]---",
  "affected": [
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
      },
      "versions": [
        "1:6.1.47-1+rpt4"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-2712",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v6",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7l",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v8",
            "binary_version": "1:6.1.47-1+rpt4"
          }
        ]
      },
      "database_specific": {
        "per_version": {
          "1:6.1.47-1+rpt4": {
            "linux_commit": "655fc658a15ae7a6f37103754adb39ba52a9a14e",
            "upstream_version": "6.1.47",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.1.122",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2024-55881"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/0840d360a8909c722fb62459f42836afe32ededb"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/7ed4db315094963de0678a8adfd43c46471b9349"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/3d2634ec0d1dbe8f4b511cf5261f327c6a76f4b6"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/22b5c2acd65dbe949032f619d4758a35a82fffc3"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/9b42d1e8e4fe9dc631162c04caa69b0d1860b0f0"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-05-24T06:48:58Z"
  }
}