An issue was discovered in the Linux kernel before 5.1.17. There is a NULL pointer dereference caused by a malicious USB device in the sound/usb/line6/pcm.c driver. Upstream patch: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=3450121997ce872eb7f1248417225827ea249710 References: https://www.openwall.com/lists/oss-security/2019/08/20/2 https://syzkaller.appspot.com/bug?id=240f09164db2c3d3af33a117c713dc7650dc29d6
Created kernel tracking bugs for this issue: Affects: fedora-all [bug 1749980]
This was fixed for Fedora with the 5.1.17 stable kernel updates.
Statement: This issue is rated as having Low impact because of the physical access needed to trigger this issue.
Mitigation: To mitigate this issue, prevent module snd-usb-line6 from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.
This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2020:1567 https://access.redhat.com/errata/RHSA-2020:1567
This issue has been addressed in the following products: Red Hat Enterprise Linux 8 Via RHSA-2020:1769 https://access.redhat.com/errata/RHSA-2020:1769