CVE-2025-37885: Debian Linux

High severity, CVSS 7.8. EPSS: 0.3% chance of exploitation in the next 30 days.

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.

Affected products

• Debian Debian Linux: version 11.0 only
• Linux Linux Kernel: from 4.4, before 5.10.237 (fixed in 5.10.237); from 5.11, before 5.15.181 (fixed in 5.15.181); from 5.16, before 6.1.136 (fixed in 6.1.136); from 6.2, before 6.6.89 (fixed in 6.6.89); from 6.7, before 6.12.26 (fixed in 6.12.26); from 6.13, before 6.14.5 (fixed in 6.14.5); …

Published 2025-05-09. Last modified 2026-07-30.