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 kernel-livepatch-5.15.50-23.125Upgrade bpftool-debuginfoUpgrade kernel-develUpgrade kernel-debuginfo-common-x86_64Upgrade kernel-tools-debuginfoUpgrade bpftoolUpgrade kernel-toolsUpgrade kernelUpgrade kernel-debuginfoUpgrade perf-debuginfoUpgrade kernel-headersUpgrade python-perf-debuginfoUpgrade perfUpgrade python-perfUpgrade kernel-debuginfo-common-aarch64Upgrade kernel-livepatch-5.10.126-117.518Upgrade kernel-tools-devel | May 22, 2025 | Feb 26, 2025 |
| Debian | — | Upgrade linux | Feb 27, 2025 | Feb 27, 2025 |
| Huawei Euleros 2_0_sp13 | — | Upgrade bpftoolUpgrade kernel-tools-libsUpgrade python3-perfUpgrade kernelUpgrade kernel-abi-stablelistsUpgrade kernel-tools | Jul 1, 2025 | Feb 26, 2025 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Feb 26, 2025 |
| Ubuntu | — | Upgrade linux-lowlatency-hwe-5.15Upgrade linux-ibmUpgrade linux-oracleUpgrade linux-awsUpgrade linux-nvidiaUpgrade linux-realtimeUpgrade linux-gcpUpgrade linux-intel-iotgUpgrade linux-riscv-5.15Upgrade linux-kvmUpgrade linux-gcp-5.15Upgrade linux-aws-5.15Upgrade linux-gkeUpgrade linux-raspiUpgrade linux-gkeopUpgrade linux-hwe-5.15Upgrade linux-azureUpgrade linux-intel-iotg-5.15Upgrade linuxUpgrade linux-lowlatencyUpgrade linux-oracle-5.15Upgrade linux-azure-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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