Vulnerability-Lookup

GHSA-2VH6-G7PQ-9FGV

Vulnerability from github – Published: 2026-05-28 12:30 – Updated: 2026-05-28 12:30

Details

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

pseries/papr-hvpipe: Prevent kernel stack memory leak to userspace

The hdr variable is allocated on the stack and only hdr.version and hdr.flags are initialized explicitly. Because the struct papr_hvpipe_hdr contains reserved padding bytes (reserved[3] and reserved2[40]), these could leak the uninitialized bytes to userspace after copy_to_user().

This patch fixes that by initializing the whole struct to 0.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-46182"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-28T10:16:33Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\npseries/papr-hvpipe: Prevent kernel stack memory leak to userspace\n\nThe hdr variable is allocated on the stack and only hdr.version and\nhdr.flags are initialized explicitly. Because the struct papr_hvpipe_hdr\ncontains reserved padding bytes (reserved[3] and reserved2[40]), these\ncould leak the uninitialized bytes to userspace after copy_to_user().\n\nThis patch fixes that by initializing the whole struct to 0.",
  "id": "GHSA-2vh6-g7pq-9fgv",
  "modified": "2026-05-28T12:30:32Z",
  "published": "2026-05-28T12:30:32Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46182"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/0479b6e9f999cc1cbad7d9f09f574fc387e605d5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cefeed44296261173a806bef988b26bc565da4be"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f88f8e4485b437e0a2f96a7ff1f88aa22d925659"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-46182 (GCVE-0-2026-46182)

Vulnerability from cvelistv5 – Published: 2026-05-28 09:36 – Updated: 2026-05-28 09:36

Title

pseries/papr-hvpipe: Prevent kernel stack memory leak to userspace

Summary

In the Linux kernel, the following vulnerability has been resolved: pseries/papr-hvpipe: Prevent kernel stack memory leak to userspace The hdr variable is allocated on the stack and only hdr.version and hdr.flags are initialized explicitly. Because the struct papr_hvpipe_hdr contains reserved padding bytes (reserved[3] and reserved2[40]), these could leak the uninitialized bytes to userspace after copy_to_user(). This patch fixes that by initializing the whole struct to 0.

Severity

No CVSS data available.

Assigner

Linux

References

3 references

URL	Tags
https://git.kernel.org/stable/c/0479b6e9f999cc1cb…
https://git.kernel.org/stable/c/f88f8e4485b437e0a…
https://git.kernel.org/stable/c/cefeed44296261173…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: cebdb522fd3edd1fe05f7b4a74a27da7dd0f8d86 , < 0479b6e9f999cc1cbad7d9f09f574fc387e605d5 (git) Affected: cebdb522fd3edd1fe05f7b4a74a27da7dd0f8d86 , < f88f8e4485b437e0a2f96a7ff1f88aa22d925659 (git) Affected: cebdb522fd3edd1fe05f7b4a74a27da7dd0f8d86 , < cefeed44296261173a806bef988b26bc565da4be (git)
Linux	Linux	Affected: 6.18 Unaffected: 0 , < 6.18 (semver) Unaffected: 6.18.30 , ≤ 6.18.* (semver) Unaffected: 7.0.7 , ≤ 7.0.* (semver) Unaffected: 7.1-rc3 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "arch/powerpc/platforms/pseries/papr-hvpipe.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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          "vendor": "Linux",
          "versions": [
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            {
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              "versionType": "original_commit_for_fix"
            }
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        }
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                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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    "datePublished": "2026-05-28T09:36:35.528Z",
    "dateReserved": "2026-05-13T15:03:33.103Z",
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}

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.

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GHSA-2VH6-G7PQ-9FGV

CVE-2026-46182 (GCVE-0-2026-46182)

Tags

Sightings

Nomenclature