Vulnerability-Lookup

GHSA-75VG-FCXX-GF7X

Vulnerability from github – Published: 2026-04-24 15:32 – Updated: 2026-04-27 15:30

Details

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

LoongArch: KVM: Make kvm_get_vcpu_by_cpuid() more robust

kvm_get_vcpu_by_cpuid() takes a cpuid parameter whose type is int, so cpuid can be negative. Let kvm_get_vcpu_by_cpuid() return NULL for this case so as to make it more robust.

This fix an out-of-bounds access to kvm_arch::phyid_map::phys_map[].

Severity

8.8 (High)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-31558"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-125"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-04-24T15:16:30Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nLoongArch: KVM: Make kvm_get_vcpu_by_cpuid() more robust\n\nkvm_get_vcpu_by_cpuid() takes a cpuid parameter whose type is int, so\ncpuid can be negative. Let kvm_get_vcpu_by_cpuid() return NULL for this\ncase so as to make it more robust.\n\nThis fix an out-of-bounds access to kvm_arch::phyid_map::phys_map[].",
  "id": "GHSA-75vg-fcxx-gf7x",
  "modified": "2026-04-27T15:30:42Z",
  "published": "2026-04-24T15:32:33Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31558"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/2db06c15d8c7a0ccb6108524e16cd9163753f354"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/47857b05bd50db01e211a1b6f513d57901cd3e6b"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/596c3f8069c4792f22fce8c4452f44410032d910"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/878cf6acb4fd8ab4126cf9d369a5bb0e23123418"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-31558 (GCVE-0-2026-31558)

Vulnerability from cvelistv5 – Published: 2026-04-24 14:35 – Updated: 2026-05-11 22:11

Title

LoongArch: KVM: Make kvm_get_vcpu_by_cpuid() more robust

Summary

In the Linux kernel, the following vulnerability has been resolved: LoongArch: KVM: Make kvm_get_vcpu_by_cpuid() more robust kvm_get_vcpu_by_cpuid() takes a cpuid parameter whose type is int, so cpuid can be negative. Let kvm_get_vcpu_by_cpuid() return NULL for this case so as to make it more robust. This fix an out-of-bounds access to kvm_arch::phyid_map::phys_map[].

Severity

8.8 (High)


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

Assigner

Linux

References

4 references

URL	Tags
https://git.kernel.org/stable/c/596c3f8069c4792f2…
https://git.kernel.org/stable/c/878cf6acb4fd8ab41…
https://git.kernel.org/stable/c/47857b05bd50db01e…
https://git.kernel.org/stable/c/2db06c15d8c7a0ccb…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 73516e9da512adc63ba3859fbd82a21f6257348f , < 596c3f8069c4792f22fce8c4452f44410032d910 (git) Affected: 73516e9da512adc63ba3859fbd82a21f6257348f , < 878cf6acb4fd8ab4126cf9d369a5bb0e23123418 (git) Affected: 73516e9da512adc63ba3859fbd82a21f6257348f , < 47857b05bd50db01e211a1b6f513d57901cd3e6b (git) Affected: 73516e9da512adc63ba3859fbd82a21f6257348f , < 2db06c15d8c7a0ccb6108524e16cd9163753f354 (git)
Linux	Linux	Affected: 6.10 Unaffected: 0 , < 6.10 (semver) Unaffected: 6.12.80 , ≤ 6.12.* (semver) Unaffected: 6.18.21 , ≤ 6.18.* (semver) Unaffected: 6.19.11 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "arch/loongarch/kvm/vcpu.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "596c3f8069c4792f22fce8c4452f44410032d910",
              "status": "affected",
              "version": "73516e9da512adc63ba3859fbd82a21f6257348f",
              "versionType": "git"
            },
            {
              "lessThan": "878cf6acb4fd8ab4126cf9d369a5bb0e23123418",
              "status": "affected",
              "version": "73516e9da512adc63ba3859fbd82a21f6257348f",
              "versionType": "git"
            },
            {
              "lessThan": "47857b05bd50db01e211a1b6f513d57901cd3e6b",
              "status": "affected",
              "version": "73516e9da512adc63ba3859fbd82a21f6257348f",
              "versionType": "git"
            },
            {
              "lessThan": "2db06c15d8c7a0ccb6108524e16cd9163753f354",
              "status": "affected",
              "version": "73516e9da512adc63ba3859fbd82a21f6257348f",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "arch/loongarch/kvm/vcpu.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.10"
            },
            {
              "lessThan": "6.10",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.80",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.21",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.80",
                  "versionStartIncluding": "6.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.21",
                  "versionStartIncluding": "6.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19.11",
                  "versionStartIncluding": "6.10",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0",
                  "versionStartIncluding": "6.10",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nLoongArch: KVM: Make kvm_get_vcpu_by_cpuid() more robust\n\nkvm_get_vcpu_by_cpuid() takes a cpuid parameter whose type is int, so\ncpuid can be negative. Let kvm_get_vcpu_by_cpuid() return NULL for this\ncase so as to make it more robust.\n\nThis fix an out-of-bounds access to kvm_arch::phyid_map::phys_map[]."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
            "version": "3.1"
          }
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T22:11:06.540Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/596c3f8069c4792f22fce8c4452f44410032d910"
        },
        {
          "url": "https://git.kernel.org/stable/c/878cf6acb4fd8ab4126cf9d369a5bb0e23123418"
        },
        {
          "url": "https://git.kernel.org/stable/c/47857b05bd50db01e211a1b6f513d57901cd3e6b"
        },
        {
          "url": "https://git.kernel.org/stable/c/2db06c15d8c7a0ccb6108524e16cd9163753f354"
        }
      ],
      "title": "LoongArch: KVM: Make kvm_get_vcpu_by_cpuid() more robust",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-31558",
    "datePublished": "2026-04-24T14:35:41.209Z",
    "dateReserved": "2026-03-09T15:48:24.116Z",
    "dateUpdated": "2026-05-11T22:11:06.540Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "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.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-75VG-FCXX-GF7X

CVE-2026-31558 (GCVE-0-2026-31558)

Tags

Sightings

Nomenclature