CVE-2026-43173 (GCVE-0-2026-43173)

Vulnerability from cvelistv5 – Published: 2026-05-06 11:27 – Updated: 2026-05-06 11:27
VLAI?
Title
net: ethernet: xscale: Check for PTP support properly
Summary
In the Linux kernel, the following vulnerability has been resolved: net: ethernet: xscale: Check for PTP support properly In ixp4xx_get_ts_info() ixp46x_ptp_find() is called unconditionally despite this feature only existing on ixp46x, leading to the following splat from tcpdump: root@OpenWrt:~# tcpdump -vv -X -i eth0 (...) Unable to handle kernel NULL pointer dereference at virtual address 00000238 when read (...) Call trace: ptp_clock_index from ixp46x_ptp_find+0x1c/0x38 ixp46x_ptp_find from ixp4xx_get_ts_info+0x4c/0x64 ixp4xx_get_ts_info from __ethtool_get_ts_info+0x90/0x108 __ethtool_get_ts_info from __dev_ethtool+0xa00/0x2648 __dev_ethtool from dev_ethtool+0x160/0x234 dev_ethtool from dev_ioctl+0x2cc/0x460 dev_ioctl from sock_ioctl+0x1ec/0x524 sock_ioctl from sys_ioctl+0x51c/0xa94 sys_ioctl from ret_fast_syscall+0x0/0x44 (...) Segmentation fault Check for ixp46x in ixp46x_ptp_find() before trying to set up PTP to avoid this. To avoid altering the returned error code from ixp4xx_hwtstamp_set() which before this patch was -EOPNOTSUPP, we return -EOPNOTSUPP from ixp4xx_hwtstamp_set() if ixp46x_ptp_find() fails no matter the error code. The helper function ixp46x_ptp_find() helper returns -ENODEV.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 9055a2f591629b952910503e72ddae1371c44bf1 , < 144dde3146985b25fa84d4e4b7c3d11e0f5fc5a4 (git)
Affected: 9055a2f591629b952910503e72ddae1371c44bf1 , < 5195b10c34b8993194ad12ad7d8f54d861be084b (git)
Affected: 9055a2f591629b952910503e72ddae1371c44bf1 , < 322437972f0a712767f6920ad34aba25f2e9b942 (git)
Affected: 9055a2f591629b952910503e72ddae1371c44bf1 , < 21d1e80d0d6e7d0c3cd8b1e001ed1fa92fb9f3f5 (git)
Affected: 9055a2f591629b952910503e72ddae1371c44bf1 , < 2d74412dfd3621552a394d55cc3dd26a7cbf608e (git)
Affected: 9055a2f591629b952910503e72ddae1371c44bf1 , < cbecebd35909f6cd0f6fb773f0fb73da99e02f8c (git)
Affected: 9055a2f591629b952910503e72ddae1371c44bf1 , < 594163ea88a03bdb412063af50fc7177ef3cbeae (git)
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    Linux Linux Affected: 5.15
Unaffected: 0 , < 5.15 (semver)
Unaffected: 5.15.202 , ≤ 5.15.* (semver)
Unaffected: 6.1.165 , ≤ 6.1.* (semver)
Unaffected: 6.6.128 , ≤ 6.6.* (semver)
Unaffected: 6.12.75 , ≤ 6.12.* (semver)
Unaffected: 6.18.16 , ≤ 6.18.* (semver)
Unaffected: 6.19.6 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/xscale/ixp4xx_eth.c",
            "drivers/net/ethernet/xscale/ptp_ixp46x.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
              "version": "9055a2f591629b952910503e72ddae1371c44bf1",
              "versionType": "git"
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          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/xscale/ixp4xx_eth.c",
            "drivers/net/ethernet/xscale/ptp_ixp46x.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.15"
            },
            {
              "lessThan": "5.15",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.202",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.165",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.128",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.75",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.16",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
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              "cpeMatch": [
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.202",
                  "versionStartIncluding": "5.15",
                  "vulnerable": true
                },
                {
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                {
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                  "vulnerable": true
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                  "versionEndExcluding": "6.12.75",
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                  "vulnerable": true
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                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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              ],
              "negate": false,
              "operator": "OR"
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        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-06T11:27:48.097Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/144dde3146985b25fa84d4e4b7c3d11e0f5fc5a4"
        },
        {
          "url": "https://git.kernel.org/stable/c/5195b10c34b8993194ad12ad7d8f54d861be084b"
        },
        {
          "url": "https://git.kernel.org/stable/c/322437972f0a712767f6920ad34aba25f2e9b942"
        },
        {
          "url": "https://git.kernel.org/stable/c/21d1e80d0d6e7d0c3cd8b1e001ed1fa92fb9f3f5"
        },
        {
          "url": "https://git.kernel.org/stable/c/2d74412dfd3621552a394d55cc3dd26a7cbf608e"
        },
        {
          "url": "https://git.kernel.org/stable/c/cbecebd35909f6cd0f6fb773f0fb73da99e02f8c"
        },
        {
          "url": "https://git.kernel.org/stable/c/594163ea88a03bdb412063af50fc7177ef3cbeae"
        }
      ],
      "title": "net: ethernet: xscale: Check for PTP support properly",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-43173",
    "datePublished": "2026-05-06T11:27:48.097Z",
    "dateReserved": "2026-05-01T14:12:55.991Z",
    "dateUpdated": "2026-05-06T11:27:48.097Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-43173",
      "date": "2026-05-10",
      "epss": "0.00024",
      "percentile": "0.0704"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-43173\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-05-06T12:16:35.707\",\"lastModified\":\"2026-05-06T13:07:51.607\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"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.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/144dde3146985b25fa84d4e4b7c3d11e0f5fc5a4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/21d1e80d0d6e7d0c3cd8b1e001ed1fa92fb9f3f5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/2d74412dfd3621552a394d55cc3dd26a7cbf608e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/322437972f0a712767f6920ad34aba25f2e9b942\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/5195b10c34b8993194ad12ad7d8f54d861be084b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/594163ea88a03bdb412063af50fc7177ef3cbeae\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/cbecebd35909f6cd0f6fb773f0fb73da99e02f8c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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