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net: fec: only stop PTP if it was initialized

Type: advisorySources: OSV

In the Linux kernel, the following vulnerability has been resolved: net: fec: only stop PTP if it was initialized fec_ptp_init() is only called when fep->bufdesc_ex is available. However, fec_probe() unconditionally calls fec_ptp_stop() on the failed_init path, and fec_drv_remove() unconditionally calls fec_ptp_stop() during device removal. Check fep->bufdesc_ex before calling fec_ptp_stop() in both paths to avoid stopping PTP when it was not initialized.

Products
Kernel
Affected versions
Not specified
Fixed versions
5.10.270, 5.15.221, 6.1.188, 6.12.110, 6.18.52, 6.6.157, 7.2.6
CVEs
CVE-2026-90056
Confirmed fixed CVEs
Not specified
Updated in this feed
2 Nov 2026, 21:19 UTC · Revision 1

Source evidence

net: fec: only stop PTP if it was initialized

core-osv · Original source

Published 17 Sept 2026, 16:05 UTC

In the Linux kernel, the following vulnerability has been resolved: net: fec: only stop PTP if it was initialized fec_ptp_init() is only called when fep->bufdesc_ex is available. However, fec_probe() unconditionally calls fec_ptp_stop() on the failed_init path, and fec_drv_remove() unconditionally calls fec_ptp_stop() during device removal. Check fep->bufdesc_ex before calling fec_ptp_stop() in both paths to avoid stopping PTP when it was not initialized.

osv:CVE-2026-90056

Kernel

Fixed versions: 5.10.270, 5.15.221, 6.1.188, 6.6.157, 6.12.110, 6.18.52, 7.2.6

Complete source record
{
  "id": "7c6da6e32c2925adccd24368929bbbc073023447943aee6dafbb51c2992f9074",
  "url": "https://osv.dev/vulnerability/CVE-2026-90056",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "net: fec: only stop PTP if it was initialized",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: net: fec: only stop PTP if it was initialized fec_ptp_init() is only called when fep->bufdesc_ex is available. However, fec_probe() unconditionally calls fec_ptp_stop() on the failed_init path, and fec_drv_remove() unconditionally calls fec_ptp_stop() during device removal. Check fep->bufdesc_ex before calling fec_ptp_stop() in both paths to avoid stopping PTP when it was not initialized.",
    "evidence": "osv:CVE-2026-90056",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
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            "value": "5.10.270",
            "evidence": "/affected/1/ranges"
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          {
            "value": "5.15.221",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.1.188",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.6.157",
            "evidence": "/affected/1/ranges"
          },
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          {
            "value": "6.18.52",
            "evidence": "/affected/1/ranges"
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          {
            "value": "7.2.6",
            "evidence": "/affected/1/ranges"
          }
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    "severity": "unknown",
    "structured": {
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      "aliases": [
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      "affected": [
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            "v3.18.101",
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          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-90056.json"
          }
        },
        {
          "ranges": [
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              "type": "ECOSYSTEM",
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                  "introduced": "4.2.0"
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          "package": {
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      ],
      "modified": "2026-10-28T02:30:23.587472748Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/0602a4c238d2b6ed6e2bf5fa8ef7fa0203883dac",
        "https://git.kernel.org/stable/c/0dc8b3a395c3a749ab62c078f2fd54a402ae7e2b",
        "https://git.kernel.org/stable/c/1973f108c481fab9bdc7daa6c77442af4a7388ab",
        "https://git.kernel.org/stable/c/1f9639caeece703012bdb23975ebedf70f426269",
        "https://git.kernel.org/stable/c/383f699a86fd04458dc47d10578c17e94f63d92f",
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        "https://git.kernel.org/stable/c/7566789664813c1778f0d4b7e0539fd863ea450c",
        "https://git.kernel.org/stable/c/dd890ae29299636fb037276fc1b5238698d08b03",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90056.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-90056",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90056.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-90056",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 490203,
  "published_at": "2026-09-17T16:05:41.003+00:00"
}