In the Linux kernel, the following vulnerability has been resolved:
KVM: SVM: Use kzalloc for sev ioctl interfaces to prevent kernel data leak
For some sev ioctl interfaces, the length parameter that is passed maybe less than or equal to SEV_FW_BLOB_MAX_SIZE, but larger than the data that PSP firmware returns. In this case, kmalloc will allocate memory that is the size of the input rather than the size of the data. Since PSP firmware doesn't fully overwrite the allocated buffer, these sev ioctl interface may return uninitialized kernel slab memory.
CVSS Details
- CVSS 3.1 Base Score: 7.1
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Amazon Linux Ami 2 | — | Upgrade perfUpgrade python-perfUpgrade python-perf-debuginfoUpgrade kernel-livepatch-5.10.126-117.518Upgrade kernel-debuginfo-common-aarch64Upgrade kernel-debuginfoUpgrade kernel-tools-develUpgrade kernel-headersUpgrade perf-debuginfoUpgrade kernelUpgrade bpftoolUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-tools-debuginfoUpgrade kernel-toolsUpgrade bpftool-debuginfoUpgrade kernel-livepatch-5.15.50-23.125Upgrade kernel-devel | May 22, 2025 | Feb 26, 2025 |
| Debian | — | Upgrade linux | Feb 27, 2025 | Feb 27, 2025 |
| Huawei Euleros 2_0_sp13 | — | Upgrade kernel-toolsUpgrade kernel-abi-stablelistsUpgrade kernelUpgrade python3-perfUpgrade kernel-tools-libsUpgrade bpftool | Jul 1, 2025 | Feb 26, 2025 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Feb 26, 2025 |
| Ubuntu | — | Upgrade linux-raspiUpgrade linux-azureUpgrade linux-intel-iotg-5.15Upgrade linux-gkeUpgrade linux-azure-5.15Upgrade linux-lowlatencyUpgrade linux-aws-5.15Upgrade linuxUpgrade linux-hwe-5.15Upgrade linux-gkeopUpgrade linux-oracle-5.15Upgrade linux-nvidiaUpgrade linux-ibmUpgrade linux-awsUpgrade linux-kvmUpgrade linux-gcp-5.15Upgrade linux-gcpUpgrade linux-oracleUpgrade linux-riscv-5.15Upgrade linux-realtimeUpgrade linux-intel-iotgUpgrade linux-lowlatency-hwe-5.15 | Mar 19, 2025 | Feb 26, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | May 27, 2026 | Feb 26, 2025 |
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