CVE-2022-49556None▾ SunlitIn 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 …
▾ Sunlit zone — Low / medium · no exploitation signal
impact 2.8 · likelihood 0.1 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Nov 5.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.3%
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.
Linux >= eaf78265a4ab33935d3a0f1407ce4a91aac4d4d5 < 401bef1f95de92c3a8c6eece46e02fa88d7285eeLinux >= eaf78265a4ab33935d3a0f1407ce4a91aac4d4d5 < d8fdb4b24097472ff6b3c0559448200d420b1418Linux >= eaf78265a4ab33935d3a0f1407ce4a91aac4d4d5 < bbdcc644b59e01e98c68894a9fab42b9687f42b0Linux >= eaf78265a4ab33935d3a0f1407ce4a91aac4d4d5 < 57a01725339f9d82b099102ba2751621b1caab93Linux >= eaf78265a4ab33935d3a0f1407ce4a91aac4d4d5 < d22d2474e3953996f03528b84b7f52cc26a39403Linux 5.7Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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