In the Linux kernel, the following vulnerability has been resolved:
crypto: ccp - Use kzalloc for sev ioctl interfaces to prevent kernel memory leak
For some sev ioctl interfaces, input may be passed that is 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 buffer, the sev ioctl interfaces with the issue may return uninitialized slab memory.
Currently, all of the ioctl interfaces in the ccp driver are safe, but to prevent future problems, change all ioctl interfaces that allocate memory with kmalloc to use kzalloc and memset the data buffer to zero in sev_ioctl_do_platform_status.
CVSS Details
- CVSS 3.1 Base Score: 5.5
- CVSS 3.1 Vector: (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
Covered by Rapid7
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Debian | — | Upgrade linux | Jun 20, 2025 | Jun 20, 2025 |
| Dell Powerstore Dsa2025429 | — | Upgrade Dell PowerStoreOS to the latest version | Dec 3, 2025 | Dec 2, 2025 |
| Dell Powerstore Dsa2026039 | — | Upgrade Dell PowerStoreOS to the latest version | Jan 13, 2026 | Jan 6, 2026 |
| Huawei Euleros 2_0_sp13 | — | Upgrade kernel-tools-libsUpgrade kernelUpgrade kernel-abi-stablelistsUpgrade python3-perfUpgrade kernel-toolsUpgrade bpftool | Mar 10, 2026 | Mar 10, 2026 |
| Redhat_linux | — | No solution exists | Jul 9, 2025 | Jun 18, 2025 |
| Ubuntu | — | Upgrade linux-kvmUpgrade linux-hwe-5.15Upgrade linux-lowlatencyUpgrade linux-awsUpgrade linux-gcp-5.15Upgrade linux-intel-iotg-5.15Upgrade linux-gkeUpgrade linux-lowlatency-hwe-5.15Upgrade linux-oracle-5.15Upgrade linux-azureUpgrade linux-aws-5.15Upgrade linux-realtimeUpgrade linux-raspiUpgrade linux-intel-iotgUpgrade linux-azure-5.15Upgrade linux-ibmUpgrade linux-riscv-5.15Upgrade linux-gkeopUpgrade linux-oracleUpgrade linux-nvidiaUpgrade linux-gcpUpgrade linux | Jun 26, 2025 | Jun 18, 2025 |
| Vmware Photon_os | — | Use 'tdnf update' to upgrade all packages to the latest version. | May 27, 2026 | Jun 18, 2025 |
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