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Review reviewHigh

CVE-2025-37957

Linux Linux, linux kernel

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) Creatin...

CVSS
7.8
EPSS
0.16%
5.42% percentile
CISA KEV
Not listed
Published
2025.05.21
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.16%
Technical severityCVSS 7.8

Vulnerability overview

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) Creatin...

Affected product and versions

Product
Linux Linux, linux kernel
Affected versions
>= ed129ec9057f89d615ba0c81a4984a90345a1684 < ec24e62a1dd3540ee696314422040180040c1e4a, >= ed129ec9057f89d615ba0c81a4984a90345a1684 < d362b21fefcef7eda8f1cd78a5925735d2b3287c, >= ed129ec9057f89d615ba0c81a4984a90345a1684 < e9b28bc65fd3a56755ba503258024608292b4ab1, >= ed129ec9057f89d615ba0c81a4984a90345a1684 < a2620f8932fa9fdabc3d78ed6efb004ca409019f, >= 6425c590d0cc6914658a630a40b7f8226aa028c3, >= d40ef0a511676bd65ca9acb295430c07af59ab85, >= 5.15.81 < 5.16, >= 6.0.11 < 6.1, >= 6.1, >= 6.1.1 < 6.6.92, >= 6.7 < 6.12.29, >= 6.13 < 6.14.7, 6.1, 6.15
Fixed versions
5.16, 6.1, 6.6.92, 6.12.29, 6.14.7

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux Linux, linux kernel and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-416