Bug 1775063 (CVE-2019-19054)

Summary: CVE-2019-19054 kernel: A memory leak in the cx23888_ir_probe() function in drivers/media/pci/cx23885/cx23888-ir.c allows attackers to cause a DoS
Product: [Other] Security Response Reporter: msiddiqu
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact:
Severity: low Docs Contact:
Priority: low    
Version: unspecifiedCC: acaringi, airlied, bdettelb, bhu, blc, brdeoliv, bskeggs, dhoward, dvlasenk, esammons, fhrbata, hdegoede, hkrzesin, iboverma, ichavero, itamar, jarodwilson, jeremy, jforbes, jlelli, john.j5live, jonathan, josef, jross, jshortt, jstancek, jwboyer, kernel-maint, kernel-mgr, lgoncalv, linville, masami256, mchehab, mcressma, mjg59, mlangsdo, nmurray, qzhao, rt-maint, rvrbovsk, steved, williams
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Fixed In Version: Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in the Linux kernel. The CX23888 Integrated Consumer Infrared Controller probe code handles resource cleanup low memory conditions. A local attacker able to induce low memory conditions could use this flaw to crash the system. The highest threat from this vulnerability is to system availability.
Story Points: ---
Clone Of: Environment:
Last Closed: 2021-10-25 22:15:21 UTC Type: ---
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Bug Depends On: 1775117, 1829354, 1829355, 1829356, 1829357, 1829358    
Bug Blocks: 1775104    

Description msiddiqu 2019-11-21 12:00:11 UTC
A memory leak in the cx23888_ir_probe() function in drivers/media/pci/cx23885/cx23888-ir.c allows attackers to cause a denial of service (memory consumption) by triggering kfifo_alloc() failures

Upstream commit:


Comment 1 msiddiqu 2019-11-21 12:20:16 UTC
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1775117]

Comment 4 Petr Matousek 2020-04-29 12:53:02 UTC

This issue is rated as having Low impact because of the preconditions needed to trigger the resource cleanup code path (system-wide out-of-memory condition).

Comment 5 Petr Matousek 2020-04-29 12:53:06 UTC

In order to mitigate this issue it is possible to prevent the affected code from being loaded by blacklisting the kernel module cx23885. For instructions relating to how to blacklist a kernel module refer to: https://access.redhat.com/solutions/41278 .