Vulnerability-Lookup

FKIE_CVE-2026-80693

Vulnerability from fkie_nvd - Published: 2026-08-28 08:16 - Updated: 2026-10-16 20:18

Severity

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

Summary

In the Linux kernel, the following vulnerability has been resolved: idpf: bound interrupt-vector register fill to the allocated array idpf_get_reg_intr_vecs() fills the caller-allocated reg_vals[] array from the VIRTCHNL2_OP_ALLOC_VECTORS reply in adapter->req_vec_chunks, bounding its inner loop only by the per-chunk num_vectors. The array is sized separately: idpf_intr_reg_init() allocates kzalloc_objs(struct idpf_vec_regs, total_vecs) from caps.num_allocated_vectors and only checks the returned count after the fill. The sum of per-chunk num_vectors is never reconciled against total_vecs, so a reply with a small num_allocated_vectors but chunks summing higher writes past the end of reg_vals[]. Impact: a control plane (a PF or hypervisor device model) that returns a VIRTCHNL2_OP_ALLOC_VECTORS reply whose per-chunk num_vectors sum exceeds num_allocated_vectors writes struct idpf_vec_regs entries past the end of the reg_vals kmalloc allocation (KASAN slab-out-of-bounds write). Bound the fill loop to the array capacity passed in by the callers, mirroring the sibling idpf_vport_get_q_reg(). The existing num_regs < num_vecs check then rejects an undersized reply without the out-of-bounds write happening first.

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/41bb8748124d0d8ee5d8e1eace9dfbc874bc9564
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/9f7007ee9858c99aa43101bc8352c672fee85644
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/e299b7d1334ebec4d43a7bb697d10c12df1aaed3

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/intel/idpf/idpf_dev.c",
            "drivers/net/ethernet/intel/idpf/idpf_vf_dev.c",
            "drivers/net/ethernet/intel/idpf/idpf_virtchnl.c",
            "drivers/net/ethernet/intel/idpf/idpf_virtchnl.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "e299b7d1334ebec4d43a7bb697d10c12df1aaed3",
              "status": "affected",
              "version": "d4d5587182664b0c4ab6d3556ce881cb975507c2",
              "versionType": "git"
            },
            {
              "lessThan": "41bb8748124d0d8ee5d8e1eace9dfbc874bc9564",
              "status": "affected",
              "version": "d4d5587182664b0c4ab6d3556ce881cb975507c2",
              "versionType": "git"
            },
            {
              "lessThan": "9f7007ee9858c99aa43101bc8352c672fee85644",
              "status": "affected",
              "version": "d4d5587182664b0c4ab6d3556ce881cb975507c2",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/intel/idpf/idpf_dev.c",
            "drivers/net/ethernet/intel/idpf/idpf_vf_dev.c",
            "drivers/net/ethernet/intel/idpf/idpf_virtchnl.c",
            "drivers/net/ethernet/intel/idpf/idpf_virtchnl.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.7"
            },
            {
              "lessThan": "6.7",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.57",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nidpf: bound interrupt-vector register fill to the allocated array\n\nidpf_get_reg_intr_vecs() fills the caller-allocated reg_vals[] array from\nthe VIRTCHNL2_OP_ALLOC_VECTORS reply in adapter-\u003ereq_vec_chunks, bounding\nits inner loop only by the per-chunk num_vectors. The array is sized\nseparately: idpf_intr_reg_init() allocates\nkzalloc_objs(struct idpf_vec_regs, total_vecs) from\ncaps.num_allocated_vectors and only checks the returned count after the\nfill. The sum of per-chunk num_vectors is never reconciled against\ntotal_vecs, so a reply with a small num_allocated_vectors but chunks\nsumming higher writes past the end of reg_vals[].\n\nImpact: a control plane (a PF or hypervisor device model) that returns a\nVIRTCHNL2_OP_ALLOC_VECTORS reply whose per-chunk num_vectors sum exceeds\nnum_allocated_vectors writes struct idpf_vec_regs entries past the end of\nthe reg_vals kmalloc allocation (KASAN slab-out-of-bounds write).\n\nBound the fill loop to the array capacity passed in by the callers,\nmirroring the sibling idpf_vport_get_q_reg(). The existing\nnum_regs \u003c num_vecs check then rejects an undersized reply without the\nout-of-bounds write happening first."
    }
  ],
  "id": "CVE-2026-80693",
  "lastModified": "2026-10-16T20:18:06.877",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 9.3,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "CHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.5,
        "impactScore": 6.0,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-80693",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-10-16T19:20:11.642760Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-08-28T08:16:54.787",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/41bb8748124d0d8ee5d8e1eace9dfbc874bc9564"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/9f7007ee9858c99aa43101bc8352c672fee85644"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e299b7d1334ebec4d43a7bb697d10c12df1aaed3"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}

CVE-2026-80693 (GCVE-0-2026-80693)

Vulnerability from cvelistv5 – Published: 2026-08-28 06:52 – Updated: 2026-10-16 19:26

Title

idpf: bound interrupt-vector register fill to the allocated array

Summary

Severity

9.3 (Critical)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-16 19:20 UTC

Assigner

Linux CNA under the mitre root

CNA scorecard D 53/100 over 6666 records in the last 180 days details

References

3 references

URL	Tags
https://git.kernel.org/stable/c/e299b7d1334ebec4d…
https://git.kernel.org/stable/c/41bb8748124d0d8ee…
https://git.kernel.org/stable/c/9f7007ee9858c99aa…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: d4d5587182664b0c4ab6d3556ce881cb975507c2 , < e299b7d1334ebec4d43a7bb697d10c12df1aaed3 (git) Affected: d4d5587182664b0c4ab6d3556ce881cb975507c2 , < 41bb8748124d0d8ee5d8e1eace9dfbc874bc9564 (git) Affected: d4d5587182664b0c4ab6d3556ce881cb975507c2 , < 9f7007ee9858c99aa43101bc8352c672fee85644 (git)
Linux	Linux	Affected: 6.7 Unaffected: 0 , < 6.7 (semver) Unaffected: 6.18.57 , ≤ 6.18.* (semver) Unaffected: 7.1.8 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-80693",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-10-16T19:20:11.642760Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-10-16T19:26:33.729Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/intel/idpf/idpf_dev.c",
            "drivers/net/ethernet/intel/idpf/idpf_vf_dev.c",
            "drivers/net/ethernet/intel/idpf/idpf_virtchnl.c",
            "drivers/net/ethernet/intel/idpf/idpf_virtchnl.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "e299b7d1334ebec4d43a7bb697d10c12df1aaed3",
              "status": "affected",
              "version": "d4d5587182664b0c4ab6d3556ce881cb975507c2",
              "versionType": "git"
            },
            {
              "lessThan": "41bb8748124d0d8ee5d8e1eace9dfbc874bc9564",
              "status": "affected",
              "version": "d4d5587182664b0c4ab6d3556ce881cb975507c2",
              "versionType": "git"
            },
            {
              "lessThan": "9f7007ee9858c99aa43101bc8352c672fee85644",
              "status": "affected",
              "version": "d4d5587182664b0c4ab6d3556ce881cb975507c2",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/intel/idpf/idpf_dev.c",
            "drivers/net/ethernet/intel/idpf/idpf_vf_dev.c",
            "drivers/net/ethernet/intel/idpf/idpf_virtchnl.c",
            "drivers/net/ethernet/intel/idpf/idpf_virtchnl.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.7"
            },
            {
              "lessThan": "6.7",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.57",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.57",
                  "versionStartIncluding": "6.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.8",
                  "versionStartIncluding": "6.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "6.7",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nidpf: bound interrupt-vector register fill to the allocated array\n\nidpf_get_reg_intr_vecs() fills the caller-allocated reg_vals[] array from\nthe VIRTCHNL2_OP_ALLOC_VECTORS reply in adapter-\u003ereq_vec_chunks, bounding\nits inner loop only by the per-chunk num_vectors. The array is sized\nseparately: idpf_intr_reg_init() allocates\nkzalloc_objs(struct idpf_vec_regs, total_vecs) from\ncaps.num_allocated_vectors and only checks the returned count after the\nfill. The sum of per-chunk num_vectors is never reconciled against\ntotal_vecs, so a reply with a small num_allocated_vectors but chunks\nsumming higher writes past the end of reg_vals[].\n\nImpact: a control plane (a PF or hypervisor device model) that returns a\nVIRTCHNL2_OP_ALLOC_VECTORS reply whose per-chunk num_vectors sum exceeds\nnum_allocated_vectors writes struct idpf_vec_regs entries past the end of\nthe reg_vals kmalloc allocation (KASAN slab-out-of-bounds write).\n\nBound the fill loop to the array capacity passed in by the callers,\nmirroring the sibling idpf_vport_get_q_reg(). The existing\nnum_regs \u003c num_vecs check then rejects an undersized reply without the\nout-of-bounds write happening first."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 9.3,
            "baseSeverity": "CRITICAL",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The bug is reached only when the idpf driver processes a VIRTCHNL2_OP_ALLOC_VECTORS reply over the PCIe virtchnl/mailbox control queue during idpf_vc_core_init()/idpf_vport_intr_init(); there is no network packet, syscall, or netlink path into idpf_get_reg_intr_vecs().\nAC:L - A malicious control plane fully controls GET_CAPS num_allocated_vectors and per-chunk num_vectors in the ALLOC_VECTORS reply, so the slab out-of-bounds write is deterministic on driver init or hardware-reset re-init without races or attacker-uncontrollable memory layout.\nPR:N - Exploitation requires no credentials on the victim OS; a malicious PF, hypervisor device model, or NIC firmware can inject the crafted virtchnl reply during probe/reset before any local user action, including in cloud VMs where tenants never administer the control plane.\nUI:N - No victim interaction is required beyond normal driver bring-up; cloud and server images auto-probe the Intel idpf PF/VF and open netdevs at boot, so the attacker need not wait for a user to mount, click, or manually configure the interface.\nS:C - The attack crosses the SR-IOV/virtio control-plane boundary: a hypervisor or device firmware outside the guest/host kernel trust domain corrupts kernel heap memory inside the idpf driver security authority, matching other virtchnl isolation-breaker CVEs.\nC:H - The flaw is a kmalloc slab out-of-bounds write of attacker-influenced struct idpf_vec_regs entries (dyn_ctl_reg, itrn_reg, itrn_index_spacing); such heap corruption can disclose adjacent slab objects and be groomed into an arbitrary kernel read primitive.\nI:H - Each overfilled entry writes 12 bytes of control-plane-supplied register metadata past reg_vals[], giving a repeatable heap overflow primitive that can corrupt adjacent allocations and be leveraged for control-flow hijack or privilege escalation in the victim kernel.\nA:H - Writing far beyond the reg_vals[] allocation corrupts slab metadata or adjacent kernel objects and can immediately oops/panic the host or guest kernel; hardware-reset recovery re-enters idpf_vc_core_init(), allowing repeated crash or re-exploitation attempts."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-15T10:09:42.896Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/e299b7d1334ebec4d43a7bb697d10c12df1aaed3"
        },
        {
          "url": "https://git.kernel.org/stable/c/41bb8748124d0d8ee5d8e1eace9dfbc874bc9564"
        },
        {
          "url": "https://git.kernel.org/stable/c/9f7007ee9858c99aa43101bc8352c672fee85644"
        }
      ],
      "title": "idpf: bound interrupt-vector register fill to the allocated array",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-80693",
    "datePublished": "2026-08-28T06:52:56.131Z",
    "dateReserved": "2026-08-26T14:34:25.785Z",
    "dateUpdated": "2026-10-16T19:26:33.729Z",
    "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.

Vulnerability timeline

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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.
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