DescriptionAn 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.
Overall state of this security issue: Does not affect SUSE products
This issue is currently rated as having moderate severity.SUSE Bugzilla entry: 1098726 [RESOLVED / WORKSFORME] No SUSE Security Announcements cross referenced.
Status of this issue by product and package
Please note that this evaluation state might be work in progress, incomplete or outdated. Also information for service packs in the LTSS phase is only included for issues meeting the LTSS criteria. If in doubt, feel free to contact us for clarification.
|SUSE Linux Enterprise Desktop 12 SP3||kernel-source||Not affected|
|SUSE Linux Enterprise Module for Basesystem 15 GA||kernel-source||Not affected|
|SUSE Linux Enterprise Module for Development Tools 15 GA||kernel-source||Not affected|
|SUSE Linux Enterprise Server 11 SP4||kernel-source||Not affected|
|SUSE Linux Enterprise Server 12 SP3||kernel-source||Not affected|