Vulnerability-Lookup

GHSA-P9J5-GJF3-CCH6

Vulnerability from github – Published: 2026-10-23 15:31 – Updated: 2026-10-23 15:31

Details

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

rtc: dev: zero-initialize struct rtc_wkalrm to prevent information leak

The struct rtc_wkalrm has padding holes after the 'pending' member. When returned to userspace via the RTC_WKALRM_RD ioctl, uninitialized kernel stack data residing in these holes may be leaked.

Zero-initialize the struct at declaration to eliminate this information leak risk.

Fixes smatch warnings: - drivers/rtc/dev.c:392 rtc_dev_ioctl() warn: check that 'alarm' doesn't leak information (struct has a hole after 'pending')

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{
  "affected": [],
  "aliases": [
    "CVE-2026-98935"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-10-23T13:17:14Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nrtc: dev: zero-initialize struct rtc_wkalrm to prevent information leak\n\nThe struct rtc_wkalrm has padding holes after the \u0027pending\u0027 member.\nWhen returned to userspace via the RTC_WKALRM_RD ioctl, uninitialized\nkernel stack data residing in these holes may be leaked.\n\nZero-initialize the struct at declaration to eliminate this information\nleak risk.\n\nFixes smatch warnings:\n- drivers/rtc/dev.c:392 rtc_dev_ioctl() warn: check that \u0027alarm\u0027 doesn\u0027t\n  leak information (struct has a hole after \u0027pending\u0027)",
  "id": "GHSA-p9j5-gjf3-cch6",
  "modified": "2026-10-23T15:31:31Z",
  "published": "2026-10-23T15:31:31Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-98935"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/00dc50cede96738dadc64b20e671186cddb8a58d"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0ee5c5d804d592a8328a425b9274487d393d3a05"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2838d7bbb551861c25187dfb581ed6e7a56762e9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/a2215eb3cbbd3d9d73cc18c08e3ef53f903443cb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/beda3c9730ad3087d01aa1d0415c40942042ec87"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-98935 (GCVE-0-2026-98935)

Vulnerability from cvelistv5 – Published: 2026-10-23 12:11 – Updated: 2026-10-23 12:11

Title

rtc: dev: zero-initialize struct rtc_wkalrm to prevent information leak

Summary

In the Linux kernel, the following vulnerability has been resolved: rtc: dev: zero-initialize struct rtc_wkalrm to prevent information leak The struct rtc_wkalrm has padding holes after the 'pending' member. When returned to userspace via the RTC_WKALRM_RD ioctl, uninitialized kernel stack data residing in these holes may be leaked. Zero-initialize the struct at declaration to eliminate this information leak risk. Fixes smatch warnings: - drivers/rtc/dev.c:392 rtc_dev_ioctl() warn: check that 'alarm' doesn't leak information (struct has a hole after 'pending')

Severity

No CVSS data available.

Assigner

Linux CNA under the mitre root

CNA scorecard D 53/100 over 7067 records in the last 180 days details

References

5 references

URL	Tags
https://git.kernel.org/stable/c/a2215eb3cbbd3d9d7…
https://git.kernel.org/stable/c/beda3c9730ad3087d…
https://git.kernel.org/stable/c/00dc50cede96738da…
https://git.kernel.org/stable/c/2838d7bbb551861c2…
https://git.kernel.org/stable/c/0ee5c5d804d592a83…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 36e14f5fdfdf7cec8887b7ff69cd9bb5051ecf62 , < a2215eb3cbbd3d9d73cc18c08e3ef53f903443cb (git) Affected: 36e14f5fdfdf7cec8887b7ff69cd9bb5051ecf62 , < beda3c9730ad3087d01aa1d0415c40942042ec87 (git) Affected: 36e14f5fdfdf7cec8887b7ff69cd9bb5051ecf62 , < 00dc50cede96738dadc64b20e671186cddb8a58d (git) Affected: 36e14f5fdfdf7cec8887b7ff69cd9bb5051ecf62 , < 2838d7bbb551861c25187dfb581ed6e7a56762e9 (git) Affected: 36e14f5fdfdf7cec8887b7ff69cd9bb5051ecf62 , < 0ee5c5d804d592a8328a425b9274487d393d3a05 (git)
Linux	Linux	Affected: 5.0 Unaffected: 0 , < 5.0 (semver) Unaffected: 6.6.160 , ≤ 6.6.* (semver) Unaffected: 6.12.113 , ≤ 6.12.* (semver) Unaffected: 6.18.56 , ≤ 6.18.* (semver) Unaffected: 7.2.10 , ≤ 7.2.* (semver) Unaffected: 7.3 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

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{
  "containers": {
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      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/rtc/dev.c"
          ],
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            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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          "versions": [
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              "status": "unaffected",
              "version": "6.12.113",
              "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": [
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          "nodes": [
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              "cpeMatch": [
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-98935",
    "datePublished": "2026-10-23T12:11:46.041Z",
    "dateReserved": "2026-09-25T10:25:14.381Z",
    "dateUpdated": "2026-10-23T12:11:46.041Z",
    "state": "PUBLISHED"
  },
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  "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.

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