Vulnerability-Lookup

FKIE_CVE-2026-72288

Vulnerability from fkie_nvd - Published: 2026-08-15 06:22 - Updated: 2026-08-17 06:18

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: KVM: arm64: vgic: Handle race between interrupt affinity change and LPI disabling Hyunwoo Kim reports some really bad races should the following situation occur: - LPI-I is pending in vcpu-B's AP list - vcpu-A writes to vcpu-B's RD to disable its LPIs - vcpu-C moves I from B to C If the last two race nicely enough, vgic_prune_ap_list() can drop the irq and AP list locks, reacquire them, and in the interval the irq has been freed. UAF follows. The fix is two-fold: - Before dropping the irq and ap_list locks, take a reference on the irq - Do not try to handle migration of the pending bit: there is no expectation that this state is retained, as per the architecture With that, we're sure that the interrupt is still around, and we safely remove it from the AP list as it has no target at this stage (unless another interrupt fires, but that's another story).

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/7258770e5814f15e8308ebda82ac9acf6964ba8e
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/b1a89d12d35a8256d2b170ced0b1c86851f3def2
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/d19dca8194ebed371e624331c6be2cb73b562caf

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "arch/arm64/kvm/vgic/vgic.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "d19dca8194ebed371e624331c6be2cb73b562caf",
              "status": "affected",
              "version": "5dd4b924e390af426e424d5e52c1b4d1566af817",
              "versionType": "git"
            },
            {
              "lessThan": "b1a89d12d35a8256d2b170ced0b1c86851f3def2",
              "status": "affected",
              "version": "5dd4b924e390af426e424d5e52c1b4d1566af817",
              "versionType": "git"
            },
            {
              "lessThan": "7258770e5814f15e8308ebda82ac9acf6964ba8e",
              "status": "affected",
              "version": "5dd4b924e390af426e424d5e52c1b4d1566af817",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "arch/arm64/kvm/vgic/vgic.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.8"
            },
            {
              "lessThan": "4.8",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.40",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.5",
              "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\nKVM: arm64: vgic: Handle race between interrupt affinity change and LPI disabling\n\nHyunwoo Kim reports some really bad races should the following\nsituation occur:\n\n- LPI-I is pending in vcpu-B\u0027s AP list\n- vcpu-A writes to vcpu-B\u0027s RD to disable its LPIs\n- vcpu-C moves I from B to C\n\nIf the last two race nicely enough, vgic_prune_ap_list() can drop\nthe irq and AP list locks, reacquire them, and in the interval\nthe irq has been freed. UAF follows.\n\nThe fix is two-fold:\n\n- Before dropping the irq and ap_list locks, take a reference on\n  the irq\n\n- Do not try to handle migration of the pending bit: there is no\n  expectation that this state is retained, as per the architecture\n\nWith that, we\u0027re sure that the interrupt is still around, and we\nsafely remove it from the AP list as it has no target at this\nstage (unless another interrupt fires, but that\u0027s another story)."
    }
  ],
  "id": "CVE-2026-72288",
  "lastModified": "2026-08-17T06:18:31.557",
  "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"
      }
    ]
  },
  "published": "2026-08-15T06:22:00.450",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/7258770e5814f15e8308ebda82ac9acf6964ba8e"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/b1a89d12d35a8256d2b170ced0b1c86851f3def2"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d19dca8194ebed371e624331c6be2cb73b562caf"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}

CVE-2026-72288 (GCVE-0-2026-72288)

Vulnerability from cvelistv5 – Published: 2026-08-15 05:55 – Updated: 2026-08-17 05:42

Title

KVM: arm64: vgic: Handle race between interrupt affinity change and LPI disabling

Summary

Severity

9.3 (Critical)


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

Assigner

Linux mitre root

References

3 references

URL	Tags
https://git.kernel.org/stable/c/d19dca8194ebed371…
https://git.kernel.org/stable/c/b1a89d12d35a8256d…
https://git.kernel.org/stable/c/7258770e5814f15e8…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 5dd4b924e390af426e424d5e52c1b4d1566af817 , < d19dca8194ebed371e624331c6be2cb73b562caf (git) Affected: 5dd4b924e390af426e424d5e52c1b4d1566af817 , < b1a89d12d35a8256d2b170ced0b1c86851f3def2 (git) Affected: 5dd4b924e390af426e424d5e52c1b4d1566af817 , < 7258770e5814f15e8308ebda82ac9acf6964ba8e (git)
Linux	Linux	Affected: 4.8 Unaffected: 0 , < 4.8 (semver) Unaffected: 6.18.40 , ≤ 6.18.* (semver) Unaffected: 7.1.5 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "arch/arm64/kvm/vgic/vgic.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "d19dca8194ebed371e624331c6be2cb73b562caf",
              "status": "affected",
              "version": "5dd4b924e390af426e424d5e52c1b4d1566af817",
              "versionType": "git"
            },
            {
              "lessThan": "b1a89d12d35a8256d2b170ced0b1c86851f3def2",
              "status": "affected",
              "version": "5dd4b924e390af426e424d5e52c1b4d1566af817",
              "versionType": "git"
            },
            {
              "lessThan": "7258770e5814f15e8308ebda82ac9acf6964ba8e",
              "status": "affected",
              "version": "5dd4b924e390af426e424d5e52c1b4d1566af817",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "arch/arm64/kvm/vgic/vgic.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.8"
            },
            {
              "lessThan": "4.8",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.40",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.5",
              "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": "6.18.40",
                  "versionStartIncluding": "4.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.5",
                  "versionStartIncluding": "4.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "4.8",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: arm64: vgic: Handle race between interrupt affinity change and LPI disabling\n\nHyunwoo Kim reports some really bad races should the following\nsituation occur:\n\n- LPI-I is pending in vcpu-B\u0027s AP list\n- vcpu-A writes to vcpu-B\u0027s RD to disable its LPIs\n- vcpu-C moves I from B to C\n\nIf the last two race nicely enough, vgic_prune_ap_list() can drop\nthe irq and AP list locks, reacquire them, and in the interval\nthe irq has been freed. UAF follows.\n\nThe fix is two-fold:\n\n- Before dropping the irq and ap_list locks, take a reference on\n  the irq\n\n- Do not try to handle migration of the pending bit: there is no\n  expectation that this state is retained, as per the architecture\n\nWith that, we\u0027re sure that the interrupt is still around, and we\nsafely remove it from the AP list as it has no target at this\nstage (unless another interrupt fires, but that\u0027s another story)."
        }
      ],
      "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 flaw is reached only from KVM guest MMIO traps on GICv3 redistributor GICR_CTLR LPI-disable writes, ITS MOVI affinity changes, and vCPU-exit paths into vgic_prune_ap_list(); no network-facing host protocol is involved.\nAC:L - A guest controls all three racing vCPUs by pinning threads to concurrently issue ITS MOVI, cross-vCPU GICR_CTLR LPI-disable writes, and vCPU exits that invoke vgic_prune_ap_list(); the attacker creates and wins the race rather than depending on uncontrollable host timing.\nPR:N - No host privileges are required beyond running code in an assigned KVM guest (e.g. a cloud VM tenant on arm64); exploitation needs guest-kernel access to GIC/ITS MMIO, not host root or capabilities in the init namespace.\nUI:N - Exploitation is fully attacker-driven from within a multi-vCPU guest VM and does not require any victim user or administrator action on the host.\nS:C - The use-after-free corrupts host-kernel heap memory (struct vgic_irq) from guest-controlled VGIC operations, crossing the guest-to-host virtualization security boundary with VM-escape impact.\nC:H - vgic_flush_pending_lpis() can free the LPI vgic_irq while vgic_prune_ap_list() still dereferences it after reacquiring dropped locks, yielding a kernel heap use-after-free exploitable for arbitrary host memory disclosure via heap grooming.\nI:H - The dangling vgic_irq pointer permits attacker-influenced writes through irq_lock, list_head, vcpu, and target_vcpu fields during ap_list migration, enabling host control-flow or data corruption primitives.\nA:H - The race frees live kernel objects still referenced by the ap_list migration path, causing host kernel oops, panic, or hang during list_del, lock operations, or subsequent LPI delivery on arm64 KVM hosts."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T05:42:23.669Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/d19dca8194ebed371e624331c6be2cb73b562caf"
        },
        {
          "url": "https://git.kernel.org/stable/c/b1a89d12d35a8256d2b170ced0b1c86851f3def2"
        },
        {
          "url": "https://git.kernel.org/stable/c/7258770e5814f15e8308ebda82ac9acf6964ba8e"
        }
      ],
      "title": "KVM: arm64: vgic: Handle race between interrupt affinity change and LPI disabling",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-72288",
    "datePublished": "2026-08-15T05:55:10.256Z",
    "dateReserved": "2026-08-09T03:40:39.917Z",
    "dateUpdated": "2026-08-17T05:42:23.669Z",
    "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.

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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FKIE_CVE-2026-72288

CVE-2026-72288 (GCVE-0-2026-72288)

Tags

Sightings

Nomenclature