CVE-2018-12633 – An issue was discovered in the Linux kernel through 4.17.2. vbg_misc_device_ioctl() in dri …

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Vuln ID: CVE-2018-12633

Published:  2018-06-22  00:29:00Z

Description: An issue was discovered in the Linux kernel through 4.17.2. vbg_misc_device_ioctl() in drivers/virt/vboxguest/vboxguest_linux.c reads the same user data twice with copy_from_user. The header part of the user data is double-fetched, and a malicious user thread can tamper with the critical variables (hdr.size_in and hdr.size_out) in the header between the two fetches because of a race condition, leading to severe kernel errors, such as buffer over-accesses. This bug can cause a local denial of service and information leakage.

Source: NVD.NIST.GOV