{
  "affected": [
    {
      "ranges": [
        {
          "events": [
            {
              "introduced": "9055a2f591629b952910503e72ddae1371c44bf1"
            },
            {
              "fixed": "322437972f0a712767f6920ad34aba25f2e9b942"
            },
            {
              "fixed": "21d1e80d0d6e7d0c3cd8b1e001ed1fa92fb9f3f5"
            },
            {
              "fixed": "2d74412dfd3621552a394d55cc3dd26a7cbf608e"
            },
            {
              "fixed": "cbecebd35909f6cd0f6fb773f0fb73da99e02f8c"
            },
            {
              "fixed": "594163ea88a03bdb412063af50fc7177ef3cbeae"
            }
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "type": "GIT"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Linux",
        "name": "Kernel"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "5.15.0"
            },
            {
              "fixed": "6.6.128"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.7.0"
            },
            {
              "fixed": "6.12.75"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.13.0"
            },
            {
              "fixed": "6.18.16"
            }
          ],
          "type": "ECOSYSTEM"
        },
        {
          "events": [
            {
              "introduced": "6.19.0"
            },
            {
              "fixed": "6.19.6"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "Linux",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43173.json"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: ethernet: xscale: Check for PTP support properly\n\nIn ixp4xx_get_ts_info() ixp46x_ptp_find() is called\nunconditionally despite this feature only existing on\nixp46x, leading to the following splat from tcpdump:\n\nroot@OpenWrt:~# tcpdump -vv -X -i eth0\n(...)\nUnable to handle kernel NULL pointer dereference at virtual address\n  00000238 when read\n(...)\nCall trace:\n ptp_clock_index from ixp46x_ptp_find+0x1c/0x38\n ixp46x_ptp_find from ixp4xx_get_ts_info+0x4c/0x64\n ixp4xx_get_ts_info from __ethtool_get_ts_info+0x90/0x108\n __ethtool_get_ts_info from __dev_ethtool+0xa00/0x2648\n __dev_ethtool from dev_ethtool+0x160/0x234\n dev_ethtool from dev_ioctl+0x2cc/0x460\n dev_ioctl from sock_ioctl+0x1ec/0x524\n sock_ioctl from sys_ioctl+0x51c/0xa94\n sys_ioctl from ret_fast_syscall+0x0/0x44\n (...)\nSegmentation fault\n\nCheck for ixp46x in ixp46x_ptp_find() before trying to set up\nPTP to avoid this.\n\nTo avoid altering the returned error code from ixp4xx_hwtstamp_set()\nwhich before this patch was -EOPNOTSUPP, we return -EOPNOTSUPP\nfrom ixp4xx_hwtstamp_set() if ixp46x_ptp_find() fails no matter\nthe error code. The helper function ixp46x_ptp_find() helper\nreturns -ENODEV.",
  "id": "CVE-2026-43173",
  "modified": "2026-07-08T05:38:16.784847305Z",
  "published": "2026-05-06T11:27:48.097Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/21d1e80d0d6e7d0c3cd8b1e001ed1fa92fb9f3f5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2d74412dfd3621552a394d55cc3dd26a7cbf608e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/322437972f0a712767f6920ad34aba25f2e9b942"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/594163ea88a03bdb412063af50fc7177ef3cbeae"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cbecebd35909f6cd0f6fb773f0fb73da99e02f8c"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43173.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43173"
    },
    {
      "type": "PACKAGE",
      "url": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
    }
  ],
  "schema_version": "1.7.5",
  "summary": "net: ethernet: xscale: Check for PTP support properly"
}