VDB

CVE-2025-37885

CVE-2025-37885 PUBLISHED CVSS 8.8 HIGH

KVM: x86: Reset IRTE to host control if *new* route isn't postable

Reported by linux · Published May 9, 2025

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.

Fixed versions

Upgrade to a fixed version or later. Language registries are listed first, then Linux distributions, then vendor products.

PackageEcosystemFixed in
kernel-toolsAmazon Linux6.1.140-154.222.amzn2023
perf6.12Amazon Linux6.12.29-33.102.amzn2023
kernel-libbpf-develAmazon Linux6.1.140-154.222.amzn2023
perfAmazon Linux6.1.140-154.222.amzn2023
python3-perf6.12Amazon Linux6.12.29-33.102.amzn2023
kernel-libbpf-staticAmazon Linux6.1.140-154.222.amzn2023
kernel6.12Amazon Linux6.12.29-33.102.amzn2023
kernel-tools-develAmazon Linux6.1.140-154.222.amzn2023
kernel-modules-extra-commonAmazon Linux6.1.140-154.222.amzn2023
kernel-develAmazon Linux6.1.140-154.222.amzn2023
kernel-libbpfAmazon Linux6.1.140-154.222.amzn2023
python3-perfAmazon Linux6.1.140-154.222.amzn2023

3 more packages have a fixed version. See every fix in Lookup.

Risk scores

CVSS 3.1
8.8
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Affected products

VendorProductVersions
LinuxLinuxefc644048ecde54f016011fe10110addd0de348f, efc644048ecde54f016011fe10110addd0de348f, efc644048ecde54f016011fe10110addd0de348f
LinuxLinux4.4, 0, 5.10.237
amazon:2023kernel-tools0
amazon:2023perf6.120
amazon:2023kernel-libbpf-devel0
amazon:2023perf0
amazon:2023python3-perf6.120
amazon:2023kernel-libbpf-static0
amazon:2023kernel6.120
amazon:2023kernel-tools-devel0
amazon:2023kernel-modules-extra-common0
amazon:2023kernel-devel0
amazon:2023kernel-libbpf0
amazon:2023python3-perf0
amazon:2023kernel-livepatch-6.12.29-33.1020
LinuxLinux4.4, 5.15.181, 6.1.136
amazon:2023kernel6.12-modules-extra0
linuxlinux_kernel4.4, 4.4, 4.4
amazon:2023bpftool0
amazon:2023kernel-modules-extra0

…and 3 more

Timeline

  • May 8, 2025 CVE Published
  • May 9, 2025 EPSS Score (30 in total, the first dated here)
  • Oct 12, 2025 PoC Published (10 in total, the first dated here)
  • Mar 29, 2026 Distribution Patch (147 in total, the first dated here)
  • Mar 29, 2026 Security Advisory (150 in total, the first dated here)
  • Jun 9, 2026 Coalition ESS Score

Query this with the API

The same record, from the CLI:

vulnetix vdb vuln CVE-2025-37885
vulnetix vdb fixes CVE-2025-37885

Or with curl, using the org id and key from your account page:

curl -s -H "Authorization: ApiKey ${VULNETIX_ORG_ID}:${VULNETIX_API_KEY}" \
  "https://api.vdb.vulnetix.com/v2/vuln/CVE-2025-37885/fixes/registry"

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References

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