Vulnerability-Lookup

GHSA-73RM-3Q3V-37G4

Vulnerability from github – Published: 2026-01-23 15:31 – Updated: 2026-02-26 21:31

Details

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

KVM: s390: Fix gmap_helper_zap_one_page() again

A few checks were missing in gmap_helper_zap_one_page(), which can lead to memory corruption in the guest under specific circumstances.

Add the missing checks.

Severity ?

7.8 (High)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2025-71155"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-787"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-01-23T15:16:06Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: s390: Fix gmap_helper_zap_one_page() again\n\nA few checks were missing in gmap_helper_zap_one_page(), which can lead\nto memory corruption in the guest under specific circumstances.\n\nAdd the missing checks.",
  "id": "GHSA-73rm-3q3v-37g4",
  "modified": "2026-02-26T21:31:27Z",
  "published": "2026-01-23T15:31:35Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-71155"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2af2abbcbf8573100288e8f8aea2dab8a2a0ceb7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2f393c228cc519ddf19b8c6c05bf15723241aa96"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2025-71155 (GCVE-0-2025-71155)

Vulnerability from cvelistv5 – Published: 2026-01-23 14:25 – Updated: 2026-02-09 08:35

Title

KVM: s390: Fix gmap_helper_zap_one_page() again

Summary

In the Linux kernel, the following vulnerability has been resolved: KVM: s390: Fix gmap_helper_zap_one_page() again A few checks were missing in gmap_helper_zap_one_page(), which can lead to memory corruption in the guest under specific circumstances. Add the missing checks.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/2af2abbcbf8573100…
	https://git.kernel.org/stable/c/2f393c228cc519ddf…

Impacted products

Vendor

Product

Version

Linux

Affected: 5deafa27d9ae040b75d392f60b12e300b42b4792 , < 2af2abbcbf8573100288e8f8aea2dab8a2a0ceb7 (git)
Affected: 5deafa27d9ae040b75d392f60b12e300b42b4792 , < 2f393c228cc519ddf19b8c6c05bf15723241aa96 (git)
Affected: 919efcadb63fc3d3a82c3de7194140e0b28903dc (git)

Linux

Affected: 6.18
Unaffected: 0 , < 6.18 (semver)
Unaffected: 6.18.4 , ≤ 6.18.* (semver)
Unaffected: 6.19 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "arch/s390/mm/gmap_helpers.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "2af2abbcbf8573100288e8f8aea2dab8a2a0ceb7",
              "status": "affected",
              "version": "5deafa27d9ae040b75d392f60b12e300b42b4792",
              "versionType": "git"
            },
            {
              "lessThan": "2f393c228cc519ddf19b8c6c05bf15723241aa96",
              "status": "affected",
              "version": "5deafa27d9ae040b75d392f60b12e300b42b4792",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "919efcadb63fc3d3a82c3de7194140e0b28903dc",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "arch/s390/mm/gmap_helpers.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.18"
            },
            {
              "lessThan": "6.18",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.19",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.4",
                  "versionStartIncluding": "6.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19",
                  "versionStartIncluding": "6.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "6.17.4",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: s390: Fix gmap_helper_zap_one_page() again\n\nA few checks were missing in gmap_helper_zap_one_page(), which can lead\nto memory corruption in the guest under specific circumstances.\n\nAdd the missing checks."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-02-09T08:35:53.434Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/2af2abbcbf8573100288e8f8aea2dab8a2a0ceb7"
        },
        {
          "url": "https://git.kernel.org/stable/c/2f393c228cc519ddf19b8c6c05bf15723241aa96"
        }
      ],
      "title": "KVM: s390: Fix gmap_helper_zap_one_page() again",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-71155",
    "datePublished": "2026-01-23T14:25:54.663Z",
    "dateReserved": "2026-01-13T15:30:19.663Z",
    "dateUpdated": "2026-02-09T08:35:53.434Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date

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.

Action not permitted

GHSA-73RM-3Q3V-37G4

CVE-2025-71155 (GCVE-0-2025-71155)

Tags

Sightings

Nomenclature