In the Linux kernel, the following vulnerability has been resolved:
KVM: Move kvm_io_bus_get_dev() locking responsibilities to callers
kvm_io_bus_get_dev() returns a device that is only matched by the address, and nothing else. This can cause a lifetime issue if the matched device is not the expected type, as by the time the caller can introspect the object, it might be gone (the srcu lock having been dropped).
Given that there is only a single user of this helper, the simplest option is to move the locking responsibility to the caller, which can keep the srcu lock held for as long as it wants.
Note that this aligns with other kvm_io_bus*() helpers, which already require the srcu lock to be held by the callers.
CVSS Details
- CVSS 3.1 Base Score: 7.8
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon_linux_2023 | — | Upgrade perfUpgrade perf-debuginfoUpgrade kernel-develUpgrade kernel-tools-develUpgrade kernel-debuginfoUpgrade kernel-livepatch-6.1.180-225.360Upgrade kernel-modules-extra-commonUpgrade python3-perfUpgrade kernel-debuginfo-common-aarch64Upgrade kernelUpgrade kernel-tools-debuginfoUpgrade bpftoolUpgrade bpftool-debuginfoUpgrade python3-perf-debuginfoUpgrade kernel-modules-extraUpgrade kernel-toolsUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-headers | Sep 1, 2026 | Aug 15, 2026 |
| Debian | — | Upgrade linux | Aug 16, 2026 | Aug 16, 2026 |
| Redhat_linux | — | No solution exists | Aug 20, 2026 | Aug 15, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Aug 21, 2026 | Aug 15, 2026 |
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