Bug 1222359 (CVE-2024-26716)

Summary: VUL-0: CVE-2024-26716: kernel: kernel: usb: core: Prevent null pointer dereference in update_port_device_state
Product: [Novell Products] SUSE Security Incidents Reporter: SMASH SMASH <smash_bz>
Component: IncidentsAssignee: Kernel Bugs <kernel-bugs>
Status: RESOLVED FIXED QA Contact: Security Team bot <security-team>
Severity: Normal    
Priority: P5 - None CC: gianluca.gabrielli
Version: unspecified   
Target Milestone: ---   
Hardware: Other   
OS: Other   
URL: https://smash.suse.de/issue/400186/
Whiteboard: CVSSv3.1:SUSE:CVE-2024-26716:5.5:(AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H)
Found By: Security Response Team Services Priority:
Business Priority: Blocker: ---
Marketing QA Status: --- IT Deployment: ---

Description SMASH SMASH 2024-04-05 09:07:03 UTC 
In the Linux kernel, the following vulnerability has been resolved:

usb: core: Prevent null pointer dereference in update_port_device_state

Currently, the function update_port_device_state gets the usb_hub from
udev->parent by calling usb_hub_to_struct_hub.
However, in case the actconfig or the maxchild is 0, the usb_hub would
be NULL and upon further accessing to get port_dev would result in null
pointer dereference.

Fix this by introducing an if check after the usb_hub is populated.

References:
http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2024-26716
https://www.cve.org/CVERecord?id=CVE-2024-26716
https://git.kernel.org/stable/c/12783c0b9e2c7915a50d5ec829630ff2da50472c
https://git.kernel.org/stable/c/465b545d1d7ef282192ddd4439b08279bdb13f6f
https://git.kernel.org/stable/c/ed85777c640cf9e6920bb1b60ed8cd48e1f4d873
https://bugzilla.redhat.com/show_bug.cgi?id=2273150
Comment 1 Gianluca Gabrielli 2024-04-05 09:07:39 UTC 
no supported branches are affected