{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-80992",
  "modified": "2026-10-09T11:39:44Z",
  "upstream": [
    "CVE-2026-80992"
  ],
  "published": "2026-09-11T19:47:07Z",
  "summary": "net: ravb: avoid dereferencing an invalid PTP clock",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ravb: avoid dereferencing an invalid PTP clock\n\nThe PTP clock is unavailable before the first open, so querying its\nindex can dereference a NULL pointer. Registration failures can also\nleave an error pointer in priv->ptp.clock.\n\nCache the PHC index separately and report -1 while no clock is\nregistered. Normalize registration errors to NULL and preserve the\nstatic timestamping capabilities.",
  "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": "6.1.188",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-80992"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/29ffd972531f8e6e0edf4ea3496190acff9fc9c2"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/bf3308416a2be85dcc9965b614a745b40beeff14"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/fc710f89a644e030a7ca15343176ca862fd61b9d"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/8d4d06d6e2b501cb8e30ed3b1924c470358e8052"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/0aaa53936419cf0c19c670387fc6d431e042a1b6"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/1f77af0aaf277413ff32f6ff8c2c4282bd64c897"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-09-14T12:06:03Z",
    "severity": {
      "source": "kernel CNA",
      "cvss_v3_score": 7.8,
      "cvss_v3_severity": "High",
      "scenario": "AV:L - ravb_get_ts_info() is reached only via local SIOCETHTOOL ETHTOOL_GET_TS_INFO, ethtool netlink TSINFO_GET, SO_TIMESTAMPING BIND_PHC, or taprio setup on the ravb netdev. Received Ethernet/PTP packets never enter this path.\nAC:L - ethtool timestamp-info on a never-opened ravb interface deterministically calls ptp_clock_index(NULL), and after a normal open/close ravb_ptp_stop() leaves a dangling priv->ptp.clock that the same query dereferences. The attacker does not need a race or a rare config.\nPR:L - ETHTOOL_GET_TS_INFO is on the ethtool ioctl allow-list that skips CAP_NET_ADMIN, and ETHTOOL_MSG_TSINFO_GET has no GENL admin flag, so an unprivileged local user can trigger it. Interface cycling is privileged, but the down/never-opened state exists after normal system management.\nUI:N - The attacker issues the ethtool ioctl/netlink query (or SO_TIMESTAMPING BIND_PHC) directly against the existing ravb netdev. No separate victim action is required.\nS:U - The defect is in the ravb kernel Ethernet/PTP driver and impacts the same kernel. It is not a guest-to-host, IOMMU, or other cross-authority boundary bypass.\nC:H - After ndo_stop, ravb_ptp_stop() unregisters and kfree's struct ptp_clock via ptp_clock_release() but leaves priv->ptp.clock set, so a later ptp_clock_index() is a kernel heap UAF read. Kernel scoring treats UAFs as high confidentiality because freed-object reuse can yield disclosure primitives.\nI:H - The get_ts_info hit is a stale read of ptp_clock.index, but after close the object is a freed heap ptp_clock. Kernel scoring treats that UAF as high integrity impact because heap reuse can be leveraged toward write or control-flow primitives.\nA:H - Before first open, ptp_clock_index(NULL) oopses; a failed ptp_clock_register() leaves an ERR_PTR that is also dereferenced; and the post-close dangling pointer is a UAF that can panic. Any of these kernel crashes is high availability impact."
    }
  }
}