CVE-2022-49556

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Source
https://cve.org/CVERecord?id=CVE-2022-49556
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-49556.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2022-49556
Downstream
Related
Published
2025-02-26T02:14:03.630Z
Modified
2026-03-12T03:25:24.217325Z
Summary
KVM: SVM: Use kzalloc for sev ioctl interfaces to prevent kernel data leak
Details

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 SEVFWBLOBMAXSIZE, 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.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49556.json",
    "cna_assigner": "Linux"
}
References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
eaf78265a4ab33935d3a0f1407ce4a91aac4d4d5
Fixed
401bef1f95de92c3a8c6eece46e02fa88d7285ee
Fixed
d8fdb4b24097472ff6b3c0559448200d420b1418
Fixed
bbdcc644b59e01e98c68894a9fab42b9687f42b0
Fixed
57a01725339f9d82b099102ba2751621b1caab93
Fixed
d22d2474e3953996f03528b84b7f52cc26a39403

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2022-49556.json"