7.8

CVE-2025-37885

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 4.4 < 5.10.237
Linux ≫ Linux Kernel Version >= 5.11 < 5.15.181
Linux ≫ Linux Kernel Version >= 5.16 < 6.1.136
Linux ≫ Linux Kernel Version >= 6.2 < 6.6.89
Linux ≫ Linux Kernel Version >= 6.7 < 6.12.26
Linux ≫ Linux Kernel Version >= 6.13 < 6.14.5
Linux ≫ Linux Kernel Version6.15 Updaterc1
Linux ≫ Linux Kernel Version6.15 Updaterc2
Linux ≫ Linux Kernel Version6.15 Updaterc3
Debian ≫ Debian Linux Version11.0
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.26% 0.172
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 7.8 1.8 5.9
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-416 Use After Free

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

https://git.kernel.org/stable/c/e5f2dee9f7fcd2ff4b97869f3c66a0d89c167769
Patch
https://git.kernel.org/stable/c/116c7d35b8f72eac383b9fd371d7c1a8ffc2968b
Patch
https://git.kernel.org/stable/c/023816bd5fa46fab94d1e7917fe131b79ed1fb41
Patch
https://git.kernel.org/stable/c/3481fd96d801715942b6f69fe251133128156f30
Patch
https://git.kernel.org/stable/c/b5de7ac74f69603ad803c524b840bffd36368fc3
Patch
https://git.kernel.org/stable/c/3066ec21d1a33896125747f68638725f456308db
Patch
https://git.kernel.org/stable/c/9bcac97dc42d2f4da8229d18feb0fe2b1ce523a2
Patch
https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html
Third Party Advisory
Mailing List
https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html
Third Party Advisory
Mailing List