GHSA-J2WF-F982-8F9V
Vulnerability from github – Published: 2026-08-15 06:32 – Updated: 2026-08-17 06:33In the Linux kernel, the following vulnerability has been resolved:
KVM: arm64: vgic: Check the interrupt is still ours before migrating it
vgic_prune_ap_list() drops both ap_list_lock and irq_lock while migrating an interrupt to another vCPU. After reacquiring the locks it only checks that the affinity is unchanged (target_vcpu == vgic_target_oracle(irq)) before moving the interrupt, which assumes that an interrupt whose affinity is preserved is still queued on this vCPU's ap_list.
That assumption no longer holds if the interrupt is taken off the ap_list while the locks are dropped. vgic_flush_pending_lpis() removes the interrupt from the list and sets irq->vcpu to NULL, but leaves enabled/pending/target_vcpu untouched. As the interrupt is still enabled and pending, vgic_target_oracle() returns the same target_vcpu, so the affinity check passes and list_del() is run a second time on an entry that has already been removed.
Also check that the interrupt is still assigned to this vCPU (irq->vcpu == vcpu) before moving it.
{
"affected": [],
"aliases": [
"CVE-2026-72289"
],
"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: Check the interrupt is still ours before migrating it\n\nvgic_prune_ap_list() drops both ap_list_lock and irq_lock while migrating\nan interrupt to another vCPU. After reacquiring the locks it only checks\nthat the affinity is unchanged (target_vcpu == vgic_target_oracle(irq))\nbefore moving the interrupt, which assumes that an interrupt whose affinity\nis preserved is still queued on this vCPU\u0027s ap_list.\n\nThat assumption no longer holds if the interrupt is taken off the ap_list\nwhile the locks are dropped. vgic_flush_pending_lpis() removes the\ninterrupt from the list and sets irq-\u003evcpu to NULL, but leaves\nenabled/pending/target_vcpu untouched. As the interrupt is still enabled\nand pending, vgic_target_oracle() returns the same target_vcpu, so the\naffinity check passes and list_del() is run a second time on an entry that\nhas already been removed.\n\nAlso check that the interrupt is still assigned to this vCPU\n(irq-\u003evcpu == vcpu) before moving it.",
"id": "GHSA-j2wf-f982-8f9v",
"modified": "2026-08-17T06:33:22Z",
"published": "2026-08-15T06:32:18Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-72289"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/0074b82cdfcb5fd13710a0ac308ade68ac6f6fbe"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/0658b09cba7fe866c6cd70cd2dcdfdcabe80328f"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/3893e1fcf6f306b327a8358dcd1cbd077989a240"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/654be81c4c637af12709d47c7efc3302cd336513"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/79fdd2aa774e44847cd9bb7edc811e73e3dc7bfe"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/cb3efe1a354f1638726725c3ecee1ce8d1a7e2dc"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/da2d249a39a1881681c303ceea33f38ba1c5bbeb"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/e363c0bc0226dc5ea5046a88e9a6864b82c45399"
}
],
"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"
}
]
}
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