{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-72296",
  "modified": "2026-10-09T11:39:44Z",
  "upstream": [
    "CVE-2026-72296"
  ],
  "published": "2026-08-15T06:04:33Z",
  "summary": "net: ife: require ETH_HLEN to be pullable in ife_decode()",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ife: require ETH_HLEN to be pullable in ife_decode()\n\nife decode may return after making only the outer IFE header and\nmetadata pullable. The caller then passes the decapsulated packet to\neth_type_trans(), which expects the inner Ethernet header to be\naccessible from the linear data area.\n\nWith a malformed IFE frame, the inner Ethernet header may still be\nshorter than ETH_HLEN in the linear area, which can lead to a crash in\nthe original code.\n\nFix this by extending the pull check in ife_decode() so that the inner\nEthernet header is also guaranteed to be pullable before returning.",
  "severity": [
    {
      "type": "CVSS_V3",
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/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-2026-72296"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/70013f9163bef7fbd9fa62f81cf91b2a7ba66163"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/be272e159dfe1207b67332ad6e17adcf59b4ea4b"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/8c8818e52fddb247ff3214622401a4de6ff8482e"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/9433578bff9c100c466a6354574892e55293cb8f"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/1cb42ec10294a55380e52e674b3df2b962648242"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/5526d1997aea6c9bd865ca4d4894b52e799d735c"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/b69ad768cd4a2ef4e07c18492ae85438ed17c7cb"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/9406f6012b7343661efb516a11c62d4db2b62f75"
    }
  ],
  "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": 9.1,
      "cvss_v3_severity": "Critical",
      "scenario": "AV:N - The flaw is hit on the ingress packet receive path (__netif_receive_skb_core\u2192sch_handle_ingress\u2192tc_run\u2192tcf_ife_act\u2192ife_decode) when a remote peer sends a malformed IFE-encapsulated Ethernet frame to a netdev with clsact/ingress IFE decode, as in SDN/NFV/ForCES edge nodes.\nAC:L - Once ingress IFE decode is present, the attacker fully controls the crafted frame (metalen, metadata size, and skb layout) to leave the inner Ethernet header non-linear or shorter than ETH_HLEN, deterministically reaching eth_type_trans() without races or uncontrollable memory layout.\nPR:N - Remote exploitation needs no credentials or capabilities on the victim\u2014only delivery of a malformed frame to an interface already configured with IFE decode; CAP_NET_ADMIN is an operator deployment prerequisite, not attacker privilege (same model as pre-configured nftables offload bugs).\nUI:N - No victim user action is required beyond normal network delivery of attacker-crafted IFE traffic; exploitation does not depend on mounting, opening files, or administrator interaction at attack time.\nS:U - Impact is confined to kernel packet-processing memory within the same kernel security authority; this is not a VM escape, IOMMU bypass, or cross-namespace scope change.\nC:H - eth_type_trans() reads the inner struct ethhdr (h_dest/h_proto) via eth_skb_pull_mac()/eth_skb_pkt_type() without ensuring ETH_HLEN bytes are linear, causing an out-of-bounds kernel read that can disclose adjacent skb/page memory beyond a few bytes.\nI:N - The defect is a missing pskb_may_pull() bounds check leading to out-of-bounds reads and crash; there is no write, UAF, or demonstrated arbitrary modification or control-flow hijack primitive.\nA:H - The fix commit states malformed IFE frames can crash the kernel; accessing a non-linear or undersized inner Ethernet header in eth_type_trans() can trigger KASAN faults, oops, or panic on the softirq receive path."
    }
  }
}