UnratedFix available

gpio: cdev: fix kernel stack leak to user-space in error path

Type: advisorySources: OSV

In the Linux kernel, the following vulnerability has been resolved: gpio: cdev: fix kernel stack leak to user-space in error path If we fail to acquire the GPIO chip guard in gpio_desc_to_lineinfo(), we return immediately before zeroing the info struct we'll end up passing to the user-space later in lineinfo_get_v1(). This may leak the kernel stack contents. Make gpio_desc_to_lineinfo() return int so that the -ENODEV returned on failure to acquire the guard can be propagated to the callers. While not strictly necessary: move the memset() before trying to acquire the SRCU read lock too for good measure.

Products: Kernel
Affected versions: Not specified
Fixed versions: 6.12.112, 6.18.55, 7.2.9
CVEs: CVE-2026-98528
Confirmed fixed CVEs: Not specified
Updated in this feed: 5 Nov 2026, 10:12 UTC · Revision 1

Source evidence

gpio: cdev: fix kernel stack leak to user-space in error path

core-osv · Original source

Published 18 Oct 2026, 15:17 UTC

osv:CVE-2026-98528

Kernel

Fixed versions: 6.12.112, 6.18.55, 7.2.9

Complete source record

{
  "id": "3f148bd2c477085adea35e2b0982919f4e43bcc5c6369ac9ae4e6c7904369f77",
  "url": "https://osv.dev/vulnerability/CVE-2026-98528",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "gpio: cdev: fix kernel stack leak to user-space in error path",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: gpio: cdev: fix kernel stack leak to user-space in error path If we fail to acquire the GPIO chip guard in gpio_desc_to_lineinfo(), we return immediately before zeroing the info struct we'll end up passing to the user-space later in lineinfo_get_v1(). This may leak the kernel stack contents. Make gpio_desc_to_lineinfo() return int so that the -ENODEV returned on failure to acquire the guard can be propagated to the callers. While not strictly necessary: move the memset() before trying to acquire the SRCU read lock too for good measure.",
    "evidence": "osv:CVE-2026-98528",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "6.12.112",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.18.55",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "7.2.9",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "CVE-2026-98528",
      "aliases": [
        "CVE-2026-98528"
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      "affected": [
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                  "fixed": "1feb5d39b05afd902ed9fc902ec5b15be03a4bdb"
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              "type": "ECOSYSTEM",
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              "type": "ECOSYSTEM",
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                  "fixed": "6.18.55"
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            {
              "type": "ECOSYSTEM",
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                {
                  "introduced": "6.19.0"
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                {
                  "fixed": "7.2.9"
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          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
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      ],
      "modified": "2026-10-28T02:30:43.695617904Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/1feb5d39b05afd902ed9fc902ec5b15be03a4bdb",
        "https://git.kernel.org/stable/c/60a466f231905cd96ae6f0f3c44a710c97873dac",
        "https://git.kernel.org/stable/c/8460ee5216ab9a38263b01dca4b0a27e083f70f3",
        "https://git.kernel.org/stable/c/cf3d043582e106a0e57002bec8a6de8929ba3e1c",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/98xxx/CVE-2026-98528.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-98528",
        "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/2026/98xxx/CVE-2026-98528.json"
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    },
    "related_cves": [
      {
        "value": "CVE-2026-98528",
        "evidence": "/id"
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    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 511585,
  "published_at": "2026-10-18T15:17:46.695+00:00"
}