FKIE_CVE-2025-37885

Vulnerability from fkie_nvd - Published: 2025-05-09 07:16 - Updated: 2025-11-12 19:36
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
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.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/023816bd5fa46fab94d1e7917fe131b79ed1fb41Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/116c7d35b8f72eac383b9fd371d7c1a8ffc2968bPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3066ec21d1a33896125747f68638725f456308dbPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/3481fd96d801715942b6f69fe251133128156f30Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9bcac97dc42d2f4da8229d18feb0fe2b1ce523a2Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/b5de7ac74f69603ad803c524b840bffd36368fc3Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e5f2dee9f7fcd2ff4b97869f3c66a0d89c167769Patch
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2025/05/msg00030.htmlMailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2025/05/msg00045.htmlMailing List, Third Party Advisory
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel 6.15
linux linux_kernel 6.15
linux linux_kernel 6.15
debian debian_linux 11.0
To clipboard 

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      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: x86: Reset IRTE to host control if *new* route isn\u0027t postable\n\nRestore an IRTE back to host control (remapped or posted MSI mode) if the\n*new* GSI route prevents posting the IRQ directly to a vCPU, regardless of\nthe GSI routing type.  Updating the IRTE if and only if the new GSI is an\nMSI results in KVM leaving an IRTE posting to a vCPU.\n\nThe dangling IRTE can result in interrupts being incorrectly delivered to\nthe guest, and in the worst case scenario can result in use-after-free,\ne.g. if the VM is torn down, but the underlying host IRQ isn\u0027t freed."
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  "id": "CVE-2025-37885",
  "lastModified": "2025-11-12T19:36:29.083",
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          "confidentialityImpact": "HIGH",
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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
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