Vulnerability-Lookup

FKIE_CVE-2026-31569

Vulnerability from fkie_nvd - Published: 2026-04-24 15:16 - Updated: 2026-06-17 10:33

Severity

7.3 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: LoongArch: KVM: Handle the case that EIOINTC's coremap is empty EIOINTC's coremap in eiointc_update_sw_coremap() can be empty, currently we get a cpuid with -1 in this case, but we actually need 0 because it's similar as the case that cpuid >= 4. This fix an out-of-bounds access to kvm_arch::phyid_map::phys_map[].

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/126053d0a685bf1f2e98db8966386f38b2336338	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/2a0cbcd28ecf6e0b88fa498bebb94bd1be61a7c3	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/b97bd69eb0f67b5f961b304d28e9ba45e202d841	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	6.13
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0
linux	linux_kernel	7.0

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "arch/loongarch/kvm/intc/eiointc.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "126053d0a685bf1f2e98db8966386f38b2336338",
              "status": "affected",
              "version": "3956a52bc05bd811082a3c9d2b423ee957e6fefc",
              "versionType": "git"
            },
            {
              "lessThan": "2a0cbcd28ecf6e0b88fa498bebb94bd1be61a7c3",
              "status": "affected",
              "version": "3956a52bc05bd811082a3c9d2b423ee957e6fefc",
              "versionType": "git"
            },
            {
              "lessThan": "b97bd69eb0f67b5f961b304d28e9ba45e202d841",
              "status": "affected",
              "version": "3956a52bc05bd811082a3c9d2b423ee957e6fefc",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "arch/loongarch/kvm/intc/eiointc.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.13"
            },
            {
              "lessThan": "6.13",
              "status": "unaffected",
              "version": "0",
              "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"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "539740A6-2448-4C77-8279-4E64A6FD93E4",
              "versionEndExcluding": "6.18.21",
              "versionStartIncluding": "6.13.1",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "4CA2E747-A9EC-4518-9AA2-B4247FC748B7",
              "versionEndExcluding": "6.19.11",
              "versionStartIncluding": "6.19",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:6.13:-:*:*:*:*:*:*",
              "matchCriteriaId": "5A3F9505-6B98-4269-8B81-127E55A1BF00",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*",
              "matchCriteriaId": "F253B622-8837-4245-BCE5-A7BF8FC76A16",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*",
              "matchCriteriaId": "4AE85AD8-4641-4E7C-A2F4-305E2CD9EE64",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*",
              "matchCriteriaId": "F666C8D8-6538-46D4-B318-87610DE64C34",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*",
              "matchCriteriaId": "02259FDA-961B-47BC-AE7F-93D7EC6E90C2",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*",
              "matchCriteriaId": "58A9FEFF-C040-420D-8F0A-BFDAAA1DF258",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*",
              "matchCriteriaId": "1D2315C0-D46F-4F85-9754-F9E5E11374A6",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:o:linux:linux_kernel:7.0:rc7:*:*:*:*:*:*",
              "matchCriteriaId": "512EE3A8-A590-4501-9A94-5D4B268D6138",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nLoongArch: KVM: Handle the case that EIOINTC\u0027s coremap is empty\n\nEIOINTC\u0027s coremap in eiointc_update_sw_coremap() can be empty, currently\nwe get a cpuid with -1 in this case, but we actually need 0 because it\u0027s\nsimilar as the case that cpuid \u003e= 4.\n\nThis fix an out-of-bounds access to kvm_arch::phyid_map::phys_map[]."
    }
  ],
  "id": "CVE-2026-31569",
  "lastModified": "2026-06-17T10:33:59.807",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.3,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "LOW",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.0,
        "impactScore": 4.7,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-04-24T15:16:31.420",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/126053d0a685bf1f2e98db8966386f38b2336338"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/2a0cbcd28ecf6e0b88fa498bebb94bd1be61a7c3"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "tags": [
        "Patch"
      ],
      "url": "https://git.kernel.org/stable/c/b97bd69eb0f67b5f961b304d28e9ba45e202d841"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-125"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

CVE-2026-31569 (GCVE-0-2026-31569)

Vulnerability from cvelistv5 – Published: 2026-04-24 14:35 – Updated: 2026-08-05 12:23

Title

LoongArch: KVM: Handle the case that EIOINTC's coremap is empty

Summary

Severity

7.3 (High)


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

Assigner

Linux mitre root

References

3 references

URL	Tags
https://git.kernel.org/stable/c/126053d0a685bf1f2…
https://git.kernel.org/stable/c/2a0cbcd28ecf6e0b8…
https://git.kernel.org/stable/c/b97bd69eb0f67b5f9…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 3956a52bc05bd811082a3c9d2b423ee957e6fefc , < 126053d0a685bf1f2e98db8966386f38b2336338 (git) Affected: 3956a52bc05bd811082a3c9d2b423ee957e6fefc , < 2a0cbcd28ecf6e0b88fa498bebb94bd1be61a7c3 (git) Affected: 3956a52bc05bd811082a3c9d2b423ee957e6fefc , < b97bd69eb0f67b5f961b304d28e9ba45e202d841 (git)
Linux	Linux	Affected: 6.13 Unaffected: 0 , < 6.13 (semver) Unaffected: 6.18.21 , ≤ 6.18.* (semver) Unaffected: 6.19.11 , ≤ 6.19.* (semver) Unaffected: 7.0 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "arch/loongarch/kvm/intc/eiointc.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "126053d0a685bf1f2e98db8966386f38b2336338",
              "status": "affected",
              "version": "3956a52bc05bd811082a3c9d2b423ee957e6fefc",
              "versionType": "git"
            },
            {
              "lessThan": "2a0cbcd28ecf6e0b88fa498bebb94bd1be61a7c3",
              "status": "affected",
              "version": "3956a52bc05bd811082a3c9d2b423ee957e6fefc",
              "versionType": "git"
            },
            {
              "lessThan": "b97bd69eb0f67b5f961b304d28e9ba45e202d841",
              "status": "affected",
              "version": "3956a52bc05bd811082a3c9d2b423ee957e6fefc",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "arch/loongarch/kvm/intc/eiointc.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.13"
            },
            {
              "lessThan": "6.13",
              "status": "unaffected",
              "version": "0",
              "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": "6.18.21",
                  "versionStartIncluding": "6.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19.11",
                  "versionStartIncluding": "6.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0",
                  "versionStartIncluding": "6.13",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nLoongArch: KVM: Handle the case that EIOINTC\u0027s coremap is empty\n\nEIOINTC\u0027s coremap in eiointc_update_sw_coremap() can be empty, currently\nwe get a cpuid with -1 in this case, but we actually need 0 because it\u0027s\nsimilar as the case that cpuid \u003e= 4.\n\nThis fix an out-of-bounds access to kvm_arch::phyid_map::phys_map[]."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.3,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The vulnerable LoongArch KVM EIOINTC path is reached through local KVM ioctls or by running guest code that causes IOCSR writes on the same host, not by network packets.\nAC:L - An attacker who can create/control a LoongArch KVM VM can supply an empty EIOINTC coremap deterministically; no race or external timing condition is required.\nPR:L - The path requires access to KVM VM/device/vCPU interfaces or control of a guest VM, which is a low-privileged local/tenant capability rather than host administrator privilege.\nUI:N - Once the attacker controls the VM/VMM inputs, triggering the bad coremap update does not require any separate victim action.\nS:C - The bug is in host KVM emulation and can be triggered from the guest/VMM boundary, so a guest or local KVM tenant can affect the host kernel security scope.\nC:L - The flaw creates a bounded negative-index host kernel read adjacent to kvm_arch::phyid_map::phys_map; there is no direct bulk memory disclosure path, but host kernel memory is still accessed out of bounds.\nI:N - The investigated path does not provide a defensible arbitrary write or host data modification primitive; the direct effect is bad lookup/interrupt routing rather than host integrity compromise.\nA:H - The out-of-bounds access is reachable on demand and was observed as a kernel UBSAN warning; on hardened or panic-on-warn configurations, and potentially with unlucky adjacent data, this can crash or destabilize the host kernel."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:23:33.914Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/126053d0a685bf1f2e98db8966386f38b2336338"
        },
        {
          "url": "https://git.kernel.org/stable/c/2a0cbcd28ecf6e0b88fa498bebb94bd1be61a7c3"
        },
        {
          "url": "https://git.kernel.org/stable/c/b97bd69eb0f67b5f961b304d28e9ba45e202d841"
        }
      ],
      "title": "LoongArch: KVM: Handle the case that EIOINTC\u0027s coremap is empty",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-31569",
    "datePublished": "2026-04-24T14:35:48.768Z",
    "dateReserved": "2026-03-09T15:48:24.117Z",
    "dateUpdated": "2026-08-05T12:23:33.914Z",
    "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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

FKIE_CVE-2026-31569

CVE-2026-31569 (GCVE-0-2026-31569)

Tags

Sightings

Nomenclature

Related by attack behaviour