{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-43248",
  "modified": "2026-10-09T11:39:44Z",
  "upstream": [
    "CVE-2026-43248"
  ],
  "published": "2026-05-06T11:29:17Z",
  "summary": "vhost: move vdpa group bound check to vhost_vdpa",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nvhost: move vdpa group bound check to vhost_vdpa\n\nRemove duplication by consolidating these here.  This reduces the\nposibility of a parent driver missing them.\n\nWhile we're at it, fix a bug in vdpa_sim where a valid ASID can be\nassigned to a group equal to ngroups, causing an out of bound write.",
  "severity": [
    {
      "type": "CVSS_V3",
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
    }
  ],
  "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": null,
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-43248"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/ddb57354634b6ba851b79da45f1de42c646f27d0"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/7441d35d14d9a3d66d925d90cb73c75394e6d454"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/406db68f9cb976a8ddfafd631197264f2307e9c9"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/cd025c1e876b4e262e71398236a1550486a73ede"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-08-05T13:16:28Z",
    "severity": {
      "source": "kernel CNA",
      "cvss_v3_score": 7.8,
      "cvss_v3_severity": "High",
      "scenario": "AV:L - The vulnerable path is reached through local `ioctl()` calls on a `/dev/vhost-vdpa-*` character device, not by network or adjacent traffic.\nAC:L - The attacker controls the ioctl arguments, including the group index and ASID, and no race or external timing condition is required once the device is accessible.\nPR:L - Creating or binding vDPA devices is administrative, but a delegated/local VM or vDPA process with access to the vhost-vdpa device can trigger the ioctl without further kernel capability checks. Choosing the higher severity option, this is Low rather than High.\nUI:N - No victim user action is needed; the local attacker directly opens the device, becomes vhost owner, and issues the ioctl.\nS:U - The impact is corruption of host kernel memory from a local host device interface, which is a standard kernel privilege/security-domain impact rather than a VM escape or separate authority crossing.\nC:H - The missing group bound permits out-of-bounds kernel heap access in the parent set_group_asid path, and such memory corruption can reasonably be developed into kernel memory disclosure.\nI:H - The bug permits an out-of-bounds kernel write of ASID/group state or adjacent locking/state fields, making kernel memory corruption and potential control-flow or privilege manipulation plausible.\nA:H - Even without full exploitation, the out-of-bounds write can corrupt kernel heap state and can reasonably crash or panic the kernel."
    }
  }
}