FKIE_CVE-2026-72284
Vulnerability from fkie_nvd - Published: 2026-08-15 06:21 - Updated: 2026-10-16 19:17
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved:
KVM: x86: Ignore pending PV EOI if the vCPU has since disabled PV EOIs
Ignore KVM's internal "service pending PV EOI" request if the vCPU has
disabled PV EOIs since the request was made. Asserting that PV EOIs are
enabled can fail if reading guest memory in pv_eoi_get_user() fails, i.e.
if pv_eoi_test_and_clr_pending() bails early, *and* the vCPU also disables
PV EOIs.
kernel BUG at arch/x86/kvm/lapic.c:3338!
Oops: invalid opcode: 0000 [#1] SMP
CPU: 4 UID: 1000 PID: 890 Comm: pv_eoi_test Not tainted 7.0.0-d585aa5894d8-vm #337 PREEMPT
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015
RIP: 0010:kvm_lapic_sync_from_vapic+0x12b/0x140 [kvm]
Call Trace:
<TASK>
kvm_arch_vcpu_ioctl_run+0x1075/0x1c30 [kvm]
kvm_vcpu_ioctl+0x2d5/0x980 [kvm]
__x64_sys_ioctl+0x8a/0xd0
do_syscall_64+0xb5/0xb40
entry_SYSCALL_64_after_hwframe+0x4b/0x53
</TASK>
Modules linked in: kvm_intel kvm irqbypass
---[ end trace 0000000000000000 ]---
References
Impacted products
| Vendor | Product | Version |
|---|
{
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"arch/x86/kvm/lapic.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "038b9ce6fafda1babd1e33d52cbc6039747a6d87",
"status": "affected",
"version": "ae7a2a3fb6f8b784c2752863f4f1f20c656f76fb",
"versionType": "git"
},
{
"lessThan": "8e9f7a95279bf608cf4c331ed89612e28c04564f",
"status": "affected",
"version": "ae7a2a3fb6f8b784c2752863f4f1f20c656f76fb",
"versionType": "git"
},
{
"lessThan": "ebd7845ca0471d251a1cb48d84eb165aff5b7123",
"status": "affected",
"version": "ae7a2a3fb6f8b784c2752863f4f1f20c656f76fb",
"versionType": "git"
},
{
"lessThan": "97542f15dc4cf6cd3fdc035e482dca54246ddf48",
"status": "affected",
"version": "ae7a2a3fb6f8b784c2752863f4f1f20c656f76fb",
"versionType": "git"
},
{
"lessThan": "32bdca80aa81c2cb906f50a88b220ce1ecdc5e6e",
"status": "affected",
"version": "ae7a2a3fb6f8b784c2752863f4f1f20c656f76fb",
"versionType": "git"
},
{
"lessThan": "9285e4070df2c40585c3d7ec9571faa7a2b97e17",
"status": "affected",
"version": "ae7a2a3fb6f8b784c2752863f4f1f20c656f76fb",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"arch/x86/kvm/lapic.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "3.6"
},
{
"lessThan": "3.6",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.178",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.145",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.97",
"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: x86: Ignore pending PV EOI if the vCPU has since disabled PV EOIs\n\nIgnore KVM\u0027s internal \"service pending PV EOI\" request if the vCPU has\ndisabled PV EOIs since the request was made. Asserting that PV EOIs are\nenabled can fail if reading guest memory in pv_eoi_get_user() fails, i.e.\nif pv_eoi_test_and_clr_pending() bails early, *and* the vCPU also disables\nPV EOIs.\n\n kernel BUG at arch/x86/kvm/lapic.c:3338!\n Oops: invalid opcode: 0000 [#1] SMP\n CPU: 4 UID: 1000 PID: 890 Comm: pv_eoi_test Not tainted 7.0.0-d585aa5894d8-vm #337 PREEMPT\n Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015\n RIP: 0010:kvm_lapic_sync_from_vapic+0x12b/0x140 [kvm]\n Call Trace:\n \u003cTASK\u003e\n kvm_arch_vcpu_ioctl_run+0x1075/0x1c30 [kvm]\n kvm_vcpu_ioctl+0x2d5/0x980 [kvm]\n __x64_sys_ioctl+0x8a/0xd0\n do_syscall_64+0xb5/0xb40\n entry_SYSCALL_64_after_hwframe+0x4b/0x53\n \u003c/TASK\u003e\n Modules linked in: kvm_intel kvm irqbypass\n ---[ end trace 0000000000000000 ]---"
}
],
"id": "CVE-2026-72284",
"lastModified": "2026-10-16T19:17:18.693",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.1,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "CHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H",
"version": "3.1"
},
"exploitabilityScore": 2.5,
"impactScore": 4.0,
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"type": "Secondary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2026-72284",
"options": [
{
"exploitation": "none"
},
{
"automatable": "no"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-10-16T18:45:41.558671Z",
"version": "2.0.3"
}
}
]
},
"published": "2026-08-15T06:21:59.240",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/038b9ce6fafda1babd1e33d52cbc6039747a6d87"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/32bdca80aa81c2cb906f50a88b220ce1ecdc5e6e"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/8e9f7a95279bf608cf4c331ed89612e28c04564f"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/9285e4070df2c40585c3d7ec9571faa7a2b97e17"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/97542f15dc4cf6cd3fdc035e482dca54246ddf48"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/ebd7845ca0471d251a1cb48d84eb165aff5b7123"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Received"
}
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Nomenclature
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Browse all ATT&CK techniques and the vulnerabilities related to each.
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