CVE-2025-37885
KVM: x86: Reset IRTE to host control if *new* route isn't postable
Severity Score
Exploit Likelihood
Affected Versions
Public Exploits
0Exploited in Wild
-Decision
Descriptions
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.
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.
CVSS Scores
SSVC
- Decision:-
Timeline
- 2025-04-16 CVE Reserved
- 2025-05-09 CVE Published
- 2025-05-09 CVE Updated
- 2025-05-09 EPSS Updated
- ---------- Exploited in Wild
- ---------- KEV Due Date
- ---------- First Exploit
CWE
CAPEC
References (8)
| URL | Tag | Source |
|---|---|---|
| https://git.kernel.org/stable/c/efc644048ecde54f016011fe10110addd0de348f | Vuln. Introduced |
| URL | Date | SRC |
|---|
| URL | Date | SRC |
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Affected Vendors, Products, and Versions
| Vendor | Product | Version | Other | Status | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Vendor | Product | Version | Other | Status | <-- --> | Vendor | Product | Version | Other | Status |
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.4 < 5.10.237 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.4 < 5.10.237" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.4 < 5.15.181 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.4 < 5.15.181" | en |
Affected
| ||||||
| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.4 < 6.1.136 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.4 < 6.1.136" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.4 < 6.6.89 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.4 < 6.6.89" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.4 < 6.12.26 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.4 < 6.12.26" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.4 < 6.14.5 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.4 < 6.14.5" | en |
Affected
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| Linux Search vendor "Linux" | Linux Kernel Search vendor "Linux" for product "Linux Kernel" | >= 4.4 < 6.15-rc4 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.4 < 6.15-rc4" | en |
Affected
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