KVM: x86: Ignore pending PV EOI if the vCPU has since disabled PV EOIs
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: 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 Modules linked in: kvm_intel kvm irqbypass ---[ end trace 0000000000000000 ]---
CVE-2026-72284
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-72284
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "ae7a2a3fb6f8b784c2752863f4f1f20c656f76fb",
"lessThan": "038b9ce6fafda1babd1e33d52cbc6039747a6d87",
"versionType": "git"
},
{
"status": "affected",
"version": "ae7a2a3fb6f8b784c2752863f4f1f20c656f76fb",
"lessThan": "8e9f7a95279bf608cf4c331ed89612e28c04564f",
"versionType": "git"
},
{
"status": "affected",
"version": "ae7a2a3fb6f8b784c2752863f4f1f20c656f76fb",
"lessThan": "ebd7845ca0471d251a1cb48d84eb165aff5b7123",
"versionType": "git"
},
{
"status": "affected",
"version": "ae7a2a3fb6f8b784c2752863f4f1f20c656f76fb",
"lessThan": "97542f15dc4cf6cd3fdc035e482dca54246ddf48",
"versionType": "git"
},
{
"status": "affected",
"version": "ae7a2a3fb6f8b784c2752863f4f1f20c656f76fb",
"lessThan": "32bdca80aa81c2cb906f50a88b220ce1ecdc5e6e",
"versionType": "git"
},
{
"status": "affected",
"version": "ae7a2a3fb6f8b784c2752863f4f1f20c656f76fb",
"lessThan": "9285e4070df2c40585c3d7ec9571faa7a2b97e17",
"versionType": "git"
}
],
"programFiles": [
"arch/x86/kvm/lapic.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "3.6"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "3.6",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.1.178",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.145",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.97",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.40",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.5",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"arch/x86/kvm/lapic.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-72284
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #33004 · Revision 1
- Added to Heist Feed
- Publisher date