Vulnerability-Lookup

GHSA-9726-H75P-MC3X

Vulnerability from github – Published: 2026-08-15 06:32 – Updated: 2026-08-17 06:33

Details

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).

Severity

9.3 (Critical)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-72288"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-15T06:22:00Z",
    "severity": "CRITICAL"
  },
  "details": "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": "GHSA-9726-h75p-mc3x",
  "modified": "2026-08-17T06:33:22Z",
  "published": "2026-08-15T06:32:18Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-72288"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7258770e5814f15e8308ebda82ac9acf6964ba8e"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/b1a89d12d35a8256d2b170ced0b1c86851f3def2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/d19dca8194ebed371e624331c6be2cb73b562caf"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

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

Vulnerability from cvelistv5 – Published: 2026-08-15 05:55 – Updated: 2026-10-21 12:44

Title

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

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).

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 18:45 UTC

Assigner

Linux CNA under the mitre root

CNA scorecard D 53/100 over 6992 records in the last 180 days details

References

5 references

URL	Tags
https://git.kernel.org/stable/c/eb74f3feb68e64cf6…
https://git.kernel.org/stable/c/77c61235d66246dd6…
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 , < eb74f3feb68e64cf69f86cb806a15d8cfb6757f4 (git) Affected: 5dd4b924e390af426e424d5e52c1b4d1566af817 , < 77c61235d66246dd6a5f55587f0afc273d832775 (git) Affected: 5dd4b924e390af426e424d5e52c1b4d1566af817 , < d19dca8194ebed371e624331c6be2cb73b562caf (git) Affected: 5dd4b924e390af426e424d5e52c1b4d1566af817 , < b1a89d12d35a8256d2b170ced0b1c86851f3def2 (git) Affected: 5dd4b924e390af426e424d5e52c1b4d1566af817 , < 7258770e5814f15e8308ebda82ac9acf6964ba8e (git)
Linux	Linux	Affected: 4.8 Unaffected: 0 , < 4.8 (semver) Unaffected: 6.6.160 , ≤ 6.6.* (semver) Unaffected: 6.12.114 , ≤ 6.12.* (semver) Unaffected: 6.18.40 , ≤ 6.18.* (semver) Unaffected: 7.1.5 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)

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JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
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                "id": "CVE-2026-72288",
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                "timestamp": "2026-10-16T18:45:49.610829Z",
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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.

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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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