{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-72033",
  "modified": "2026-10-09T11:39:44Z",
  "upstream": [
    "CVE-2026-72033"
  ],
  "published": "2026-08-15T06:04:33Z",
  "summary": "orangefs: keep the readdir entry size 64-bit in fill_from_part()",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\norangefs: keep the readdir entry size 64-bit in fill_from_part()\n\nfill_from_part() computes the size of a directory entry in size_t but\nstores it in a __u32. An entry length near U32_MAX wraps it to a small\nvalue, bypasses the bounds check, and is then used to index the entry,\nreading far past the directory part -- an out-of-bounds read that oopses\nthe kernel.\n\nCompute the size as a u64 so it cannot truncate; the bounds check then\nrejects the entry. The trailer is supplied by the userspace client.",
  "severity": [
    {
      "type": "CVSS_V3",
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/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": "6.1.178",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-72033"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/1679780f482feeb82acb5995587d4fb1d1fe82fd"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/a72bbb43689591c9d36e3bb45c2d4e688cf92682"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/36723b28e3293047f087f4501f1ef4ead418dd84"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/07c05601a9a8e5d4481b2a4a16dc0e3c5bc63ad9"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/fdf06a1b66ff39664b01c6bb6a2aa98d81e8ebe1"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/82fc886e244c76fadf05ef1958aaf8815478ccde"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/e3d325c0bdb7bc5d1b4cc8d8441d79794cd03729"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/18227a6bc98bd0ba96ed3ce9d5b28776a5a28dfc"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-08-17T05:50:24Z",
    "severity": {
      "source": "kernel CNA",
      "cvss_v3_score": 9.8,
      "cvss_v3_severity": "Critical",
      "scenario": "AV:N - fill_from_part() parses readdir trailer bytes relayed by pvfs2-client-core from an OrangeFS/PVFS server over the cluster network; a malicious or compromised server can supply crafted directory-entry lengths that reach the kernel during getdents on HPC client nodes without local shell access.\nAC:L - An entry length near U32_MAX makes padlen truncate to a small __u32, reliably bypassing the bounds check and forcing the subsequent s[*len] probe; the attacker fully controls the trailer fields and no race, heap layout, or timing condition beyond readdir is required.\nPR:N - A remote malicious OrangeFS/PVFS metadata server needs no account, capabilities, or namespaces on victim HPC compute nodes; once clients mount the filesystem, any process with directory read access can trigger parsing of attacker-supplied trailer bytes.\nUI:N - No victim interaction is required beyond normal automated directory scans (cron, parallel job launchers, monitoring); the attacker does not need a user to mount the filesystem or click anything\u2014only pre-existing cluster mounts to the compromised server.\nS:U - The out-of-bounds read and resulting kernel oops occur entirely within the victim client's kernel address space during VFS readdir processing; there is no inherent crossing of VM, container, IOMMU, or sandbox security boundaries.\nC:H - The integer truncation lets the kernel index gigabytes past the vzalloc readdir part buffer via s[*len], an unbounded out-of-bounds read over adjacent kernel memory before the fault; per CNA guidance OOB reads of this class are rated High.\nI:H - The bounds bypass is a memory-corruption class flaw that can reach beyond the allocated directory part into adjacent kernel heap; even though the immediate access is a read, CNA guidance rates such unchecked OOB probes as High integrity impact due to exploit chaining potential.\nA:H - The maintainer confirmed the out-of-bounds read oopses the kernel; the inflated index can touch unmapped pages far outside the PART_SIZE-limited trailer buffer, causing a kernel fault, panic, or node crash on HPC clients during routine readdir."
    }
  }
}