In the Linux kernel, the following vulnerability has been resolved:
KVM: SEV: Use READ_ONCE() when reading entries/indices from PSC buffer
Use READ_ONCE() when reading entries/indices from the guest-accessible Page State Change buffer to defend against TOCTOU bugs.
Don't bother with READ_ONCE()/WRITE_ONCE() for cases where KVM is writing (and not consuming the result!), as the guest isn't supposed to touch the buffer while it's being processed. I.e. using READ_ONCE() is all about protecting against misbehaving guests.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon_linux_2023 | — | Upgrade perf6.18Upgrade python3-perf6.12Upgrade kernel6.18-tools-debuginfoUpgrade kernel6.18-modules-extra-commonUpgrade kernel6.12-debuginfo-common-x86_64Upgrade kernel6.18-develUpgrade kernel6.18-tools-develUpgrade perf6.12Upgrade kernel6.12-debuginfoUpgrade kernel6.12-tools-develUpgrade bpftool6.18Upgrade kernel6.18Upgrade kernel6.12-tools-debuginfoUpgrade python3-perf6.18Upgrade kernel6.12-develUpgrade kernel6.12-headersUpgrade kernel6.12-toolsUpgrade kernel-livepatch-6.12.94-123.174Upgrade microvm-kernel6.18Upgrade kernel6.18-modules-extraUpgrade perf6.12-debuginfoUpgrade kernel6.12-modules-extraUpgrade perf6.18-debuginfoUpgrade bpftool6.12-debuginfoUpgrade kernel6.12Upgrade kernel-livepatch-6.18.35-68.127Upgrade kernel6.18-debuginfoUpgrade python3-perf6.12-debuginfoUpgrade kernel6.18-debuginfo-common-aarch64Upgrade bpftool6.18-debuginfoUpgrade kernel6.18-toolsUpgrade kernel6.12-debuginfo-common-aarch64Upgrade python3-perf6.18-debuginfoUpgrade kernel6.12-modules-extra-commonUpgrade bpftool6.12Upgrade kernel6.18-headersUpgrade kernel6.18-debuginfo-common-x86_64 | Aug 10, 2026 | Jul 19, 2026 |
| Debian | — | Upgrade linux | Jul 23, 2026 | Jul 23, 2026 |
| Redhat_linux | — | No solution exists | Jul 23, 2026 | Jul 19, 2026 |
| Ubuntu | — | Upgrade linux-image-gcp-64kUpgrade linux-image-gcp-64k-7.0Upgrade linux-image-oracleUpgrade linux-image-nvidia-bosUpgrade linux-image-gcp-7.0Upgrade linux-image-gcpUpgrade linux-image-7.0.0-1011-gcpUpgrade linux-image-oracle-64kUpgrade linux-image-raspi-7.0Upgrade linux-image-awsUpgrade linux-image-azure-7.0Upgrade linux-image-raspi-realtimeUpgrade linux-image-7.0.0-1009-azure-fdeUpgrade linux-image-nvidia-64kUpgrade linux-image-7.0.0-1011-gcp-64kUpgrade linux-image-7.0.0-1011-oracleUpgrade linux-image-nvidia-7.0Upgrade linux-image-nvidia-bos-64k-7.0Upgrade linux-image-7.0.0-1008-oracleUpgrade linux-image-7.0.0-1008-oracle-64kUpgrade linux-image-azure-fdeUpgrade linux-image-7.0.0-1015-raspi-realtimeUpgrade linux-image-7.0.0-1014-azureUpgrade linux-image-ibmUpgrade linux-image-aws-7.0Upgrade linux-image-7.0.0-1009-aws-64kUpgrade linux-image-7.0.0-1009-awsUpgrade linux-image-raspiUpgrade linux-image-oracle-64k-7.0Upgrade linux-image-raspi-realtime-7.0Upgrade linux-image-7.0.0-1015-raspiUpgrade linux-image-oracle-7.0Upgrade linux-image-7.0.0-2016-nvidia-bos-64kUpgrade linux-image-ibm-7.0Upgrade linux-image-7.0.0-2016-nvidia-bosUpgrade linux-image-nvidia-64k-hwe-26.04Upgrade linux-image-7.0.0-1010-ibmUpgrade linux-image-aws-64k-7.0Upgrade linux-image-7.0.0-1016-nvidia-64kUpgrade linux-image-7.0.0-1010-azureUpgrade linux-image-nvidiaUpgrade linux-image-nvidia-hwe-26.04Upgrade linux-image-nvidia-64k-7.0Upgrade linux-image-7.0.0-1016-nvidiaUpgrade linux-image-7.0.0-1011-oracle-64kUpgrade linux-image-azureUpgrade linux-image-nvidia-bos-64kUpgrade linux-image-aws-64kUpgrade linux-image-azure-fde-7.0Upgrade linux-image-nvidia-bos-7.0 | Jul 21, 2026 | Jul 20, 2026 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | Aug 3, 2026 | Jul 19, 2026 |
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