A NULL pointer dereference vulnerability was found in drivers/tty/vt/vt_ioctl.c in the Linux kernel before 5.5.7. A race condition when call to VT_RESIZEX ioctl and vc_cons[i].d is already NULL could lead to crash. Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=6cd1ed50efd88261298577cd92a14f2768eddeeb
This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2022:7444 https://access.redhat.com/errata/RHSA-2022:7444
This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2022:7683 https://access.redhat.com/errata/RHSA-2022:7683
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-2020-36558
This issue has been addressed in the following products: Red Hat Enterprise Linux 8.6 Extended Update Support Via RHSA-2023:5627 https://access.redhat.com/errata/RHSA-2023:5627
Created kernel tracking bugs for this issue: Affects: fedora-all [bug 2274389]