Bug 1749976 (CVE-2019-15223) - CVE-2019-15223 kernel: Null pointer dereference in the sound/usb/line6/driver.c
Summary: CVE-2019-15223 kernel: Null pointer dereference in the sound/usb/line6/driver.c
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2019-15223
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1738610 1749987 1820447 1820448
Blocks: 1749989
TreeView+ depends on / blocked
 
Reported: 2019-09-07 01:21 UTC by Pedro Sampaio
Modified: 2021-10-25 09:53 UTC (History)
41 users (show)

Fixed In Version:
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Doc Text:
A NULL pointer dereference flaw was found in the way the Line 6 POD USB driver in the Linux kernel handled disconnection. This flaw allows an attacker with physical access to the system to crash the system.
Clone Of:
Environment:
Last Closed: 2021-10-25 09:53:17 UTC

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Description Pedro Sampaio 2019-09-07 01:21:05 UTC 
An issue was discovered in the Linux kernel before 5.1.8. There is a NULL pointer dereference caused by a malicious USB device in the sound/usb/line6/driver.c driver.

Upstream patch:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0b074ab7fc0d575247b9cc9f93bb7e007ca38840

References:

https://syzkaller.appspot.com/bug?id=0c1e517c657d3de2361cb0cc2d3a8663c25039a7
http://www.openwall.com/lists/oss-security/2019/08/20/2
Comment 1 Pedro Sampaio 2019-09-07 02:33:30 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1749987]
Comment 2 Justin M. Forbes 2019-09-09 08:17:06 UTC 
This was fixed for Fedora with the 5.1.8 stable kernel updates.
Comment 3 Petr Matousek 2020-04-03 06:11:03 UTC 
Statement:

This issue is rated as having Low impact because of the physical access needed to trigger this issue.
Comment 4 Petr Matousek 2020-04-03 06:11:07 UTC 
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.
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