KVM: x86: Acquire SRCU in KVM_GET_MP_STATE to protect guest memory accesses
In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Acquire SRCU in KVM_GET_MP_STATE to protect guest memory accesses Acquire a lock on kvm->srcu when userspace is getting MP state to handle a rather extreme edge case where "accepting" APIC events, i.e. processing pending INIT or SIPI, can trigger accesses to guest memory. If the vCPU is in L2 with INIT *and* a TRIPLE_FAULT request pending, then getting MP state will trigger a nested VM-Exit by way of ->check_nested_events(), and emuating the nested VM-Exit can access guest memory. The splat was originally hit by syzkaller on a Google-internal kernel, and reproduced on an upstream kernel by hacking the triple_fault_event_test selftest to stuff a pending INIT, store an MSR on VM-Exit (to generate a memory access on VMX), and do vcpu_mp_state_get() to trigger the scenario. ============================= WARNING: suspicious RCU usage 6.14.0-rc3-b112d356288b-vmx/pi_lockdep_false_pos-lock #3 Not tainted ----------------------------- include/linux/kvm_host.h:1058 suspicious rcu_dereference_check() usage! other info that might help us debug this: rcu_scheduler_active = 2, debug_locks = 1 1 lock held by triple_fault_ev/1256: #0: ffff88810df5a330 (&vcpu->mutex){+.+.}-{4:4}, at: kvm_vcpu_ioctl+0x8b/0x9a0 [kvm] stack backtrace: CPU: 11 UID: 1000 PID: 1256 Comm: triple_fault_ev Not tainted 6.14.0-rc3-b112d356288b-vmx #3 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 0.0.0 02/06/2015 Call Trace: dump_sta
CVE-2025-23141
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-2025-23141
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": "1c96dcceaeb3a99aaf0d548eef2223e0b02a7e40",
"lessThan": "56d997b257075951a46663970cd350cd5e34c041",
"versionType": "git"
},
{
"status": "affected",
"version": "1c96dcceaeb3a99aaf0d548eef2223e0b02a7e40",
"lessThan": "0357c8406dfa09430dd9858ebe813feb65524b6e",
"versionType": "git"
},
{
"status": "affected",
"version": "1c96dcceaeb3a99aaf0d548eef2223e0b02a7e40",
"lessThan": "8a3df0aa1087a89f5ce55f4aba816bfcb1ecf1be",
"versionType": "git"
},
{
"status": "affected",
"version": "1c96dcceaeb3a99aaf0d548eef2223e0b02a7e40",
"lessThan": "7bc5c360375d28ba5ef6298b0d53e735c81d66a1",
"versionType": "git"
},
{
"status": "affected",
"version": "1c96dcceaeb3a99aaf0d548eef2223e0b02a7e40",
"lessThan": "f5cbe725b7477b4cd677be1b86b4e08f90572997",
"versionType": "git"
},
{
"status": "affected",
"version": "1c96dcceaeb3a99aaf0d548eef2223e0b02a7e40",
"lessThan": "592e040572f216d916f465047c8ce4a308fcca44",
"versionType": "git"
},
{
"status": "affected",
"version": "1c96dcceaeb3a99aaf0d548eef2223e0b02a7e40",
"lessThan": "ef01cac401f18647d62720cf773d7bb0541827da",
"versionType": "git"
}
],
"programFiles": [
"arch/x86/kvm/x86.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.11"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.11",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.15.209",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.135",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.88",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.24",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.13.12",
"versionType": "semver",
"lessThanOrEqual": "6.13.*"
},
{
"status": "unaffected",
"version": "6.14.3",
"versionType": "semver",
"lessThanOrEqual": "6.14.*"
},
{
"status": "unaffected",
"version": "6.15",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"arch/x86/kvm/x86.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2025-23141
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #30464 · Revision 1
- Added to Heist Feed
- Publisher date