Bug 1851480 (CVE-2019-19227)

Summary: CVE-2019-19227 kernel: potential NULL pointer dereference leads to DoS
Product: [Other] Security Response Reporter: Dhananjay Arunesh <darunesh>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED NOTABUG QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: acaringi, airlied, bhu, blc, bmasney, brdeoliv, bskeggs, dhoward, dvlasenk, esammons, fhrbata, hdegoede, hkrzesin, iboverma, ichavero, itamar, jarodwilson, jeremy, jforbes, jglisse, jlelli, john.j5live, jonathan, josef, jross, jshortt, jstancek, jwboyer, kcarcia, kernel-maint, kernel-mgr, labbott, lgoncalv, linville, masami256, matt, mchehab, mcressma, mjg59, mlangsdo, nmurray, ptalbert, qzhao, rt-maint, rvrbovsk, steved, williams
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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Clone Of: Environment:
Last Closed: 2020-07-06 09:29:57 UTC Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 1851481    
Bug Blocks: 1851482    

Description Dhananjay Arunesh 2020-06-26 16:54:25 UTC
A vulnerability was found in Linux Kernel, where a potential NULL pointer dereference because register_snap_client may return NULL. This will lead to denial of service in net/appletalk/aarp.c and net/appletalk/ddp.c, as demonstrated by unregister_snap_client.

References:
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.1
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=9804501fa1228048857910a6bf23e085aade37cc

Comment 1 Dhananjay Arunesh 2020-06-26 16:55:20 UTC
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1851481]

Comment 2 Justin M. Forbes 2020-06-29 14:29:45 UTC
This was fixed for Fedora with the 5.1 kernel rebases.

Comment 3 Alex 2020-07-06 09:29:57 UTC
The affected functionality not used by rhel* (means not inside kernel).
Checked that non-relevant for rhel*.
Closing as NOTABUG.