KVM: SVM: Forcibly leave SMM mode on SHUTDOWN interception
In the Linux kernel, the following vulnerability has been resolved: KVM: SVM: Forcibly leave SMM mode on SHUTDOWN interception Previously, commit ed129ec9057f ("KVM: x86: forcibly leave nested mode on vCPU reset") addressed an issue where a triple fault occurring in nested mode could lead to use-after-free scenarios. However, the commit did not handle the analogous situation for System Management Mode (SMM). This omission results in triggering a WARN when KVM forces a vCPU INIT after SHUTDOWN interception while the vCPU is in SMM. This situation was reprodused using Syzkaller by: 1) Creating a KVM VM and vCPU 2) Sending a KVM_SMI ioctl to explicitly enter SMM 3) Executing invalid instructions causing consecutive exceptions and eventually a triple fault The issue manifests as follows: WARNING: CPU: 0 PID: 25506 at arch/x86/kvm/x86.c:12112 kvm_vcpu_reset+0x1d2/0x1530 arch/x86/kvm/x86.c:12112 Modules linked in: CPU: 0 PID: 25506 Comm: syz-executor.0 Not tainted 6.1.130-syzkaller-00157-g164fe5dde9b6 #0 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:kvm_vcpu_reset+0x1d2/0x1530 arch/x86/kvm/x86.c:12112 Call Trace: shutdown_interception+0x66/0xb0 arch/x86/kvm/svm/svm.c:2136 svm_invoke_exit_handler+0x110/0x530 arch/x86/kvm/svm/svm.c:3395 svm_handle_exit+0x424/0x920 arch/x86/kvm/svm/svm.c:3457 vcpu_enter_guest arch/x86/kvm/x86.c:10959 [inline] vcpu_run+0x2c43/0x5a90 arch/x86/kvm/x86.c:11062 kvm_arch_vcpu_ioctl_run+0x50f/0x1cf0 arch/x86/kvm/x8
CVE-2025-37957
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-2025-37957
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": "ed129ec9057f89d615ba0c81a4984a90345a1684",
"lessThan": "ec24e62a1dd3540ee696314422040180040c1e4a",
"versionType": "git"
},
{
"status": "affected",
"version": "ed129ec9057f89d615ba0c81a4984a90345a1684",
"lessThan": "d362b21fefcef7eda8f1cd78a5925735d2b3287c",
"versionType": "git"
},
{
"status": "affected",
"version": "ed129ec9057f89d615ba0c81a4984a90345a1684",
"lessThan": "e9b28bc65fd3a56755ba503258024608292b4ab1",
"versionType": "git"
},
{
"status": "affected",
"version": "ed129ec9057f89d615ba0c81a4984a90345a1684",
"lessThan": "a2620f8932fa9fdabc3d78ed6efb004ca409019f",
"versionType": "git"
},
{
"status": "affected",
"version": "6425c590d0cc6914658a630a40b7f8226aa028c3",
"versionType": "git"
},
{
"status": "affected",
"version": "d40ef0a511676bd65ca9acb295430c07af59ab85",
"versionType": "git"
},
{
"status": "affected",
"version": "5.15.81",
"lessThan": "5.16",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.0.11",
"lessThan": "6.1",
"versionType": "semver"
}
],
"programFiles": [
"arch/x86/kvm/smm.c",
"arch/x86/kvm/svm/svm.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.1"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.1",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.92",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.29",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.14.7",
"versionType": "semver",
"lessThanOrEqual": "6.14.*"
},
{
"status": "unaffected",
"version": "6.15",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"arch/x86/kvm/smm.c",
"arch/x86/kvm/svm/svm.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2025-37957
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #30500 · Revision 1
- Added to Heist Feed
- Publisher date