Bug 1775015 (CVE-2019-19063) - CVE-2019-19063 kernel: Two memory leaks in the rtl_usb_probe() function in drivers/net/wireless/realtek/rtlwifi/usb.c allow for a DoS
Summary: CVE-2019-19063 kernel: Two memory leaks in the rtl_usb_probe() function in dr...
Keywords:
Status: NEW
Alias: CVE-2019-19063
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: 1829847 1829848 1829849 1829850 1775016 1829851
Blocks: 1775018
TreeView+ depends on / blocked
 
Reported: 2019-11-21 11:24 UTC by Marian Rehak
Modified: 2020-06-02 09:01 UTC (History)
48 users (show)

Fixed In Version:
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Doc Text:
A flaw was found in the Linux kernel. The rtl_usb_probe function mishandles resource cleanup on error. An attacker able to induce the error conditions could use this flaw to crash the system. The highest threat from this vulnerability is to system availability.
Clone Of:
Environment:
Last Closed:


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Description Marian Rehak 2019-11-21 11:24:14 UTC
Two memory leaks in the rtl_usb_probe() function in drivers/net/wireless/realtek/rtlwifi/usb.c in the Linux kernel through 5.3.11 allow attackers to cause a denial of service (memory consumption).

Upstream Issue:

https://github.com/torvalds/linux/commit/3f93616951138a598d930dcaec40f2bfd9ce43bb

Comment 1 Marian Rehak 2019-11-21 11:24:35 UTC
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1775016]

Comment 2 Dave Baker 2019-11-25 17:21:41 UTC
Closing services.  No wifi usage in this environment.

Comment 4 Petr Matousek 2020-04-30 13:17:45 UTC
Statement:

This issue is rated as having Low impact because of the preconditions needed to trigger the resource cleanup code path (physical access).

Comment 5 Petr Matousek 2020-04-30 13:17:49 UTC
Mitigation:

In order to mitigate this issue it is possible to prevent the affected code from being loaded by blacklisting the kernel module rtl8192cu. For instructions relating to how to blacklist a kernel module refer to: https://access.redhat.com/solutions/41278 .


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