CVE-2025-37885KVM: x86: Reset IRTE to host control if *new* route isn't postable
Updated under an hour ago ()
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It affects Linux and 2 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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
- 8.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 15, 2026
Affected products
Linux Linux linux:linux (from the name) | from efc644048ecde54f016011fe10110addd0de348f before e5f2dee9f7fcd2ff4b97869f3c66a0d89c167769; from efc644048ecde54f016011fe10110addd0de348f before 116c7d35b8f72eac383b9fd371d7c1a8ffc2968b; from efc644048ecde54f016011fe10110addd0de348f before 023816bd5fa46fab94d1e7917fe131b79ed1fb41; from efc644048ecde54f016011fe10110addd0de348f before 3481fd96d801715942b6f69fe251133128156f30; from efc644048ecde54f016011fe10110addd0de348f before b5de7ac74f69603ad803c524b840bffd36368fc3; from efc644048ecde54f016011fe10110addd0de348f before 3066ec21d1a33896125747f68638725f456308db; from efc644048ecde54f016011fe10110addd0de348f before 9bcac97dc42d2f4da8229d18feb0fe2b1ce523a2 | CNA record |
linux linux_kernel linux:linux_kernel | from 4.4 before 5.10.237; from 5.11 before 5.15.181; from 5.16 before 6.1.136; from 6.2 before 6.6.89; from 6.7 before 6.12.26; from 6.13 before 6.14.5; 6.15; 6.15; and 1 more ranges | NVD |
debian debian_linux debian:debian_linux | 11.0 | NVD |
References
- https://git.kernel.org/stable/c/e5f2dee9f7fcd2ff4b97869f3c66a0d89c167769patch
- https://git.kernel.org/stable/c/116c7d35b8f72eac383b9fd371d7c1a8ffc2968bpatch
- https://git.kernel.org/stable/c/023816bd5fa46fab94d1e7917fe131b79ed1fb41patch
- https://git.kernel.org/stable/c/3481fd96d801715942b6f69fe251133128156f30patch
- https://git.kernel.org/stable/c/b5de7ac74f69603ad803c524b840bffd36368fc3patch
- https://git.kernel.org/stable/c/3066ec21d1a33896125747f68638725f456308dbpatch
- https://git.kernel.org/stable/c/9bcac97dc42d2f4da8229d18feb0fe2b1ce523a2patch
- https://lists.debian.org/debian-lts-announce/2025/05/msg00030.htmlmailing-list, third-party-advisory
- https://lists.debian.org/debian-lts-announce/2025/05/msg00045.htmlmailing-list, third-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.