Vulnerability-Lookup

GHSA-9HV5-VQFC-JQJG

Vulnerability from github – Published: 2026-10-18 18:32 – Updated: 2026-10-18 18:32

Details

In the Linux kernel, the following vulnerability has been resolved:

net: sparx5: skip ptp deinit if init was skipped

sparx5_ptp_init() returns early on the base lan969x variants because they do not have the SPX5_FEATURE_PTP flag. It also returns early when no "ptp" interrupt is described. Unbinding the driver then causes a NULL pointer dereference when cleaning up uninitialized tx_skbs queues:

Unable to handle kernel NULL pointer dereference at virtual address
0000000000000008
Call trace:
skb_queue_purge_reason+0x68/0x120 (P)
sparx5_ptp_deinit+0x64/0xc0
mchp_sparx5_remove+0x38/0x70
platform_remove+0x20/0x30
device_remove+0x4c/0x80

Before per-port tx_skbs were added, a NULL dereference would have happened when calling ptp_clock_unregister() on the never-registered PTP clocks.

Fix by returning early in sparx5_ptp_deinit() if PTP is not used.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-98795"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-10-18T16:17:33Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: sparx5: skip ptp deinit if init was skipped\n\nsparx5_ptp_init() returns early on the base lan969x variants\nbecause they do not have the SPX5_FEATURE_PTP flag. It also returns early\nwhen no \"ptp\" interrupt is described. Unbinding the driver then causes a\nNULL pointer dereference when cleaning up uninitialized tx_skbs queues:\n\n    Unable to handle kernel NULL pointer dereference at virtual address\n    0000000000000008\n    Call trace:\n    skb_queue_purge_reason+0x68/0x120 (P)\n    sparx5_ptp_deinit+0x64/0xc0\n    mchp_sparx5_remove+0x38/0x70\n    platform_remove+0x20/0x30\n    device_remove+0x4c/0x80\n\nBefore per-port tx_skbs were added, a NULL dereference would have happened\nwhen calling ptp_clock_unregister() on the never-registered PTP clocks.\n\nFix by returning early in sparx5_ptp_deinit() if PTP is not used.",
  "id": "GHSA-9hv5-vqfc-jqjg",
  "modified": "2026-10-18T18:32:04Z",
  "published": "2026-10-18T18:32:04Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98795"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0d2c49915bc3aea4521cda5e4d42f24f63b94585"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2879b65bfa548e10d59c5fba91d17f8a00cd7029"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/35c706d6eb1963735814c5f5bb2674a96eacf3cc"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-98795 (GCVE-0-2026-98795)

Vulnerability from cvelistv5 – Published: 2026-10-18 15:48 – Updated: 2026-10-19 09:25

Title

net: sparx5: skip ptp deinit if init was skipped

Summary

In the Linux kernel, the following vulnerability has been resolved: net: sparx5: skip ptp deinit if init was skipped sparx5_ptp_init() returns early on the base lan969x variants because they do not have the SPX5_FEATURE_PTP flag. It also returns early when no "ptp" interrupt is described. Unbinding the driver then causes a NULL pointer dereference when cleaning up uninitialized tx_skbs queues: Unable to handle kernel NULL pointer dereference at virtual address 0000000000000008 Call trace: skb_queue_purge_reason+0x68/0x120 (P) sparx5_ptp_deinit+0x64/0xc0 mchp_sparx5_remove+0x38/0x70 platform_remove+0x20/0x30 device_remove+0x4c/0x80 Before per-port tx_skbs were added, a NULL dereference would have happened when calling ptp_clock_unregister() on the never-registered PTP clocks. Fix by returning early in sparx5_ptp_deinit() if PTP is not used.

Severity

No CVSS data available.

Assigner

Linux CNA under the mitre root

CNA scorecard D 53/100 over 6637 records in the last 180 days details

References

3 references

URL	Tags
https://git.kernel.org/stable/c/35c706d6eb1963735…
https://git.kernel.org/stable/c/2879b65bfa548e10d…
https://git.kernel.org/stable/c/0d2c49915bc3aea45…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 0933bd04047c3b96ba49545a8f91e7e6f8f666ff , < 35c706d6eb1963735814c5f5bb2674a96eacf3cc (git) Affected: 0933bd04047c3b96ba49545a8f91e7e6f8f666ff , < 2879b65bfa548e10d59c5fba91d17f8a00cd7029 (git) Affected: 0933bd04047c3b96ba49545a8f91e7e6f8f666ff , < 0d2c49915bc3aea4521cda5e4d42f24f63b94585 (git)
Linux	Linux	Affected: 5.18 Unaffected: 0 , < 5.18 (semver) Unaffected: 6.18.56 , ≤ 6.18.* (semver) Unaffected: 7.2.10 , ≤ 7.2.* (semver) Unaffected: 7.3 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/microchip/sparx5/sparx5_ptp.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "35c706d6eb1963735814c5f5bb2674a96eacf3cc",
              "status": "affected",
              "version": "0933bd04047c3b96ba49545a8f91e7e6f8f666ff",
              "versionType": "git"
            },
            {
              "lessThan": "2879b65bfa548e10d59c5fba91d17f8a00cd7029",
              "status": "affected",
              "version": "0933bd04047c3b96ba49545a8f91e7e6f8f666ff",
              "versionType": "git"
            },
            {
              "lessThan": "0d2c49915bc3aea4521cda5e4d42f24f63b94585",
              "status": "affected",
              "version": "0933bd04047c3b96ba49545a8f91e7e6f8f666ff",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/microchip/sparx5/sparx5_ptp.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.18"
            },
            {
              "lessThan": "5.18",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.56",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.56",
                  "versionStartIncluding": "5.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.10",
                  "versionStartIncluding": "5.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3",
                  "versionStartIncluding": "5.18",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: sparx5: skip ptp deinit if init was skipped\n\nsparx5_ptp_init() returns early on the base lan969x variants\nbecause they do not have the SPX5_FEATURE_PTP flag. It also returns early\nwhen no \"ptp\" interrupt is described. Unbinding the driver then causes a\nNULL pointer dereference when cleaning up uninitialized tx_skbs queues:\n\n    Unable to handle kernel NULL pointer dereference at virtual address\n    0000000000000008\n    Call trace:\n    skb_queue_purge_reason+0x68/0x120 (P)\n    sparx5_ptp_deinit+0x64/0xc0\n    mchp_sparx5_remove+0x38/0x70\n    platform_remove+0x20/0x30\n    device_remove+0x4c/0x80\n\nBefore per-port tx_skbs were added, a NULL dereference would have happened\nwhen calling ptp_clock_unregister() on the never-registered PTP clocks.\n\nFix by returning early in sparx5_ptp_deinit() if PTP is not used."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T09:25:48.008Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        {
          "url": "https://git.kernel.org/stable/c/0d2c49915bc3aea4521cda5e4d42f24f63b94585"
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      "title": "net: sparx5: skip ptp deinit if init was skipped",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98795",
    "datePublished": "2026-10-18T15:48:39.633Z",
    "dateReserved": "2026-09-25T10:25:14.370Z",
    "dateUpdated": "2026-10-19T09:25:48.008Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

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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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