CVE - CVE-2022-49556

CVE-ID
CVE-2022-49556	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
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.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/401bef1f95de92c3a8c6eece46e02fa88d7285ee URL:https://git.kernel.org/stable/c/401bef1f95de92c3a8c6eece46e02fa88d7285ee MISC:https://git.kernel.org/stable/c/57a01725339f9d82b099102ba2751621b1caab93 URL:https://git.kernel.org/stable/c/57a01725339f9d82b099102ba2751621b1caab93 MISC:https://git.kernel.org/stable/c/bbdcc644b59e01e98c68894a9fab42b9687f42b0 URL:https://git.kernel.org/stable/c/bbdcc644b59e01e98c68894a9fab42b9687f42b0 MISC:https://git.kernel.org/stable/c/d22d2474e3953996f03528b84b7f52cc26a39403 URL:https://git.kernel.org/stable/c/d22d2474e3953996f03528b84b7f52cc26a39403 MISC:https://git.kernel.org/stable/c/d8fdb4b24097472ff6b3c0559448200d420b1418 URL:https://git.kernel.org/stable/c/d8fdb4b24097472ff6b3c0559448200d420b1418
Assigning CNA
kernel.org
Date Record Created
20250226	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20250226)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
This is an record on the CVE List, which provides common identifiers for publicly known cybersecurity vulnerabilities.
Search CVE Using Keywords: You can also search by reference using the CVE Reference Maps.
For More Information: CVE Request Web Form (select "Other" from dropdown)