A flaw in the Linux Kernel framebuffer-based console driver found. When sending malicious data to kernel by ioctl FBIOPUT_VSCREENINFO, kernel will write memory out of bounds. To trigger the vulnerability user need to have access to console driver like /dev/fb0. Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=086ff84617185393a0bbf25830c4f36412a7d3f4
Created kernel tracking bugs for this issue: Affects: fedora-all [bug 2109115]
This was fixed for Fedora with the 5.18.11 stable kernel updates.
This issue has been addressed in the following products: Red Hat Enterprise Linux 9 Via RHSA-2023:2148 https://access.redhat.com/errata/RHSA-2023:2148
This issue has been addressed in the following products: Red Hat Enterprise Linux 9 Via RHSA-2023:2458 https://access.redhat.com/errata/RHSA-2023:2458
This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2023:2736 https://access.redhat.com/errata/RHSA-2023:2736
This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2023:2951 https://access.redhat.com/errata/RHSA-2023:2951
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s): https://access.redhat.com/security/cve/cve-2021-33655
This issue has been addressed in the following products: Red Hat Enterprise Linux 8.6 Extended Update Support Via RHSA-2024:0930 https://access.redhat.com/errata/RHSA-2024:0930