Description
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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
eaf78265a4ab33935d3a0f1407ce4a91aac4d4d5 to < 401bef1f95de92c3a8c6eece46e02fa88d7285eeaffectedeaf78265a4ab33935d3a0f1407ce4a91aac4d4d5 to < d8fdb4b24097472ff6b3c0559448200d420b1418affectedeaf78265a4ab33935d3a0f1407ce4a91aac4d4d5 to < bbdcc644b59e01e98c68894a9fab42b9687f42b0affectedeaf78265a4ab33935d3a0f1407ce4a91aac4d4d5 to < 57a01725339f9d82b099102ba2751621b1caab93affectedeaf78265a4ab33935d3a0f1407ce4a91aac4d4d5 to < d22d2474e3953996f03528b84b7f52cc26a39403affected
Linux Linux
Default version status: affected
5.7affected0 to < 5.7unaffected5.10.124 to ≤ 5.10.*unaffected5.15.45 to ≤ 5.15.*unaffected5.17.13 to ≤ 5.17.*unaffected5.18.2 to ≤ 5.18.*unaffected5.19 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/401bef1f95de92c3a8c6eece46e02fa88d7285ee ↗
- https://git.kernel.org/stable/c/d8fdb4b24097472ff6b3c0559448200d420b1418 ↗
- https://git.kernel.org/stable/c/bbdcc644b59e01e98c68894a9fab42b9687f42b0 ↗
- https://git.kernel.org/stable/c/57a01725339f9d82b099102ba2751621b1caab93 ↗
- https://git.kernel.org/stable/c/d22d2474e3953996f03528b84b7f52cc26a39403 ↗