{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-64000",
  "modified": "2026-10-09T11:39:44Z",
  "upstream": [
    "CVE-2026-64000"
  ],
  "published": "2026-07-19T14:56:29Z",
  "summary": "net: hsr: fix potential OOB access in supervision frame handling",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: hsr: fix potential OOB access in supervision frame handling\n\nEnsure the entire TLV header is linearized before access by adding\nsizeof(struct hsr_sup_tlv) to the pskb_may_pull() calls. Without this,\na truncated frame could cause an out-of-bounds access.",
  "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": "6.1.176",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-64000"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/09a37dca090c55ffb1a33f52d8667f1c2367ef48"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/a4b64f3e9c7b8259f7dd251a0313420ba7c01852"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/71c986c0ba45b7dc574fae27c83e7b6671556f37"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/fbd0662f9c9a66e8cc3df3099cca8ed6d3837cc7"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/78607a6854a22a2502f68092202e75a39af4865d"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/f229426072fc865654a60978bb7fda790a051ff3"
    }
  ],
  "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": 9.8,
      "cvss_v3_severity": "Critical",
      "scenario": "AV:N - The vulnerable code is reached when the kernel processes received Ethernet frames via the netdev RX handler in net/hsr, and a remote attacker on the HSR/PRP ring can deliver a crafted supervision frame without any local access to the victim host.\nAC:L - The attacker fully controls the malformed frame content and length; a precisely truncated supervision frame reliably passes existing TLV validation and triggers the out-of-bounds read with no races or attacker-uncontrollable conditions.\nPR:N - Exploitation requires only the ability to inject L2 HSR/PRP supervision frames onto the ring segment; no local account, capabilities, or authentication on the target kernel is needed.\nUI:N - No victim user action is required beyond normal operation of an HSR/PRP-configured node; the attacker triggers the bug solely by sending a malicious frame.\nS:U - Impact is confined to kernel memory safety within the same security authority; there is no VM escape, IOMMU bypass, or cross-security-boundary scope change.\nC:H - The bug is an out-of-bounds read of supervision TLV header fields past the skb tail, which can disclose adjacent kernel heap/skb memory and is not strictly bounded to a few attacker-uncontrolled bytes.\nI:H - Out-of-bounds access in kernel packet parsing can supply attacker-influenced TLV type/length values that drive further skb_pull arithmetic and extended parsing, creating a plausible path to memory corruption and control-flow hijacking.\nA:H - Reading beyond the skb buffer boundary during softirq packet processing can cause a kernel oops/panic, and the attacker can repeatedly trigger the condition with crafted frames."
    }
  }
}