KVM: x86: Reset IRTE to host control if *new* route isn't postable
In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Reset IRTE to host control if *new* route isn't postable Restore an IRTE back to host control (remapped or posted MSI mode) if the *new* GSI route prevents posting the IRQ directly to a vCPU, regardless of the GSI routing type. Updating the IRTE if and only if the new GSI is an MSI results in KVM leaving an IRTE posting to a vCPU. The dangling IRTE can result in interrupts being incorrectly delivered to the guest, and in the worst case scenario can result in use-after-free, e.g. if the VM is torn down, but the underlying host IRQ isn't freed.
CVE-2025-37885
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-2025-37885
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": "efc644048ecde54f016011fe10110addd0de348f",
"lessThan": "e5f2dee9f7fcd2ff4b97869f3c66a0d89c167769",
"versionType": "git"
},
{
"status": "affected",
"version": "efc644048ecde54f016011fe10110addd0de348f",
"lessThan": "116c7d35b8f72eac383b9fd371d7c1a8ffc2968b",
"versionType": "git"
},
{
"status": "affected",
"version": "efc644048ecde54f016011fe10110addd0de348f",
"lessThan": "023816bd5fa46fab94d1e7917fe131b79ed1fb41",
"versionType": "git"
},
{
"status": "affected",
"version": "efc644048ecde54f016011fe10110addd0de348f",
"lessThan": "3481fd96d801715942b6f69fe251133128156f30",
"versionType": "git"
},
{
"status": "affected",
"version": "efc644048ecde54f016011fe10110addd0de348f",
"lessThan": "b5de7ac74f69603ad803c524b840bffd36368fc3",
"versionType": "git"
},
{
"status": "affected",
"version": "efc644048ecde54f016011fe10110addd0de348f",
"lessThan": "3066ec21d1a33896125747f68638725f456308db",
"versionType": "git"
},
{
"status": "affected",
"version": "efc644048ecde54f016011fe10110addd0de348f",
"lessThan": "9bcac97dc42d2f4da8229d18feb0fe2b1ce523a2",
"versionType": "git"
}
],
"programFiles": [
"arch/x86/kvm/svm/avic.c",
"arch/x86/kvm/vmx/posted_intr.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.4"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.4",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.237",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.181",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.136",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.89",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.26",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.14.5",
"versionType": "semver",
"lessThanOrEqual": "6.14.*"
},
{
"status": "unaffected",
"version": "6.15",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"arch/x86/kvm/svm/avic.c",
"arch/x86/kvm/vmx/posted_intr.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2025-37885
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #30485 · Revision 1
- Added to Heist Feed
- Publisher date