Red Hat: CVE-2024-36896: kernel: USB: core: Fix access violation during port device removal (Multiple Advisories)

Red Hat: CVE-2024-36896: kernel: USB: core: Fix access violation during port device removal (Multiple Advisories)

Severity

5

CVSS

(AV:L/AC:L/Au:S/C:N/I:N/A:C)

Published

05/30/2024

Created

08/13/2024

Added

08/12/2024

Modified

12/05/2024

Description

In the Linux kernel, the following vulnerability has been resolved: USB: core: Fix access violation during port device removal Testing with KASAN and syzkaller revealed a bug in port.c:disable_store(): usb_hub_to_struct_hub() can return NULL if the hub that the port belongs to is concurrently removed, but the function does not check for this possibility before dereferencing the returned value. It turns out that the first dereference is unnecessary, since hub->intfdev is the parent of the port device, so it can be changed easily.Adding a check for hub == NULL prevents further problems. The same bug exists in the disable_show() routine, and it can be fixed the same way.

Solution(s)

• redhat-upgrade-kernel
• redhat-upgrade-kernel-rt

References

• CVE-2024-36896
• RHSA-2024:5101
• RHSA-2024:5102
• RHSA-2024:9315