Vulnerability-Lookup

FKIE_CVE-2026-43173

Vulnerability from fkie_nvd - Published: 2026-05-06 12:16 - Updated: 2026-05-12 20:01

Severity ?

5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/144dde3146985b25fa84d4e4b7c3d11e0f5fc5a4	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/21d1e80d0d6e7d0c3cd8b1e001ed1fa92fb9f3f5	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/2d74412dfd3621552a394d55cc3dd26a7cbf608e	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/322437972f0a712767f6920ad34aba25f2e9b942	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/5195b10c34b8993194ad12ad7d8f54d861be084b	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/594163ea88a03bdb412063af50fc7177ef3cbeae	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/cbecebd35909f6cd0f6fb773f0fb73da99e02f8c	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	7.0

JSON

To clipboard

{
  "configurations": [
    {
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        {
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              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "B0330CE4-09CE-43EF-A9C8-CD49FFD1DC98",
              "versionEndExcluding": "5.15.202",
              "versionStartIncluding": "5.15",
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      "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."
    }
  ],
  "id": "CVE-2026-43173",
  "lastModified": "2026-05-12T20:01:45.853",
  "metrics": {
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          "attackVector": "LOCAL",
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          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
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          "version": "3.1"
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        "impactScore": 3.6,
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        "type": "Primary"
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  "published": "2026-05-06T12:16:35.707",
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  "vulnStatus": "Analyzed",
  "weaknesses": [
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          "value": "CWE-476"
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      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

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

Vulnerability from cvelistv5 – Published: 2026-05-06 11:27 – Updated: 2026-05-11 22:19

Title

net: ethernet: xscale: Check for PTP support properly

Summary

Severity ?

No CVSS data available.

Assigner

Linux

References

7 references

URL	Tags
https://git.kernel.org/stable/c/144dde3146985b25f…
https://git.kernel.org/stable/c/5195b10c34b899319…
https://git.kernel.org/stable/c/322437972f0a71276…
https://git.kernel.org/stable/c/21d1e80d0d6e7d0c3…
https://git.kernel.org/stable/c/2d74412dfd3621552…
https://git.kernel.org/stable/c/cbecebd35909f6cd0…
https://git.kernel.org/stable/c/594163ea88a03bdb4…

Impacted products

2 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)
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)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
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      "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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            },
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              "versionType": "semver"
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              "versionType": "semver"
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              "status": "unaffected",
              "version": "6.6.128",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "6.12.75",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "6.18.16",
              "versionType": "semver"
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              "versionType": "semver"
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          "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."
        }
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        "dateUpdated": "2026-05-11T22:19:11.951Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/5195b10c34b8993194ad12ad7d8f54d861be084b"
        },
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        },
        {
          "url": "https://git.kernel.org/stable/c/594163ea88a03bdb412063af50fc7177ef3cbeae"
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      ],
      "title": "net: ethernet: xscale: Check for PTP support properly",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-43173",
    "datePublished": "2026-05-06T11:27:48.097Z",
    "dateReserved": "2026-05-01T14:12:55.991Z",
    "dateUpdated": "2026-05-11T22:19:11.951Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

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.

Detection rules are retrieved from Rulezet.

Action not permitted

FKIE_CVE-2026-43173

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

Tags

Sightings

Nomenclature