Bug 1774946 (CVE-2019-19072)

Summary: CVE-2019-19072 kernel: A memory leak in the predicate_parse() function in kernel/trace/trace_events_filter.c allows for a DoS
Product: [Other] Security Response Reporter: Marian Rehak <mrehak>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: NEW --- QA Contact:
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Priority: high    
Version: unspecifiedCC: acaringi, airlied, bdettelb, bhu, blc, brdeoliv, bskeggs, dhoward, dvlasenk, esammons, eshatokhin, fhrbata, hdegoede, hkrzesin, iboverma, ichavero, itamar, jarodwilson, jeremy, jforbes, jglisse, jlelli, john.j5live, jonathan, josef, jross, jschorr, jshortt, jstancek, jwboyer, kernel-maint, kernel-mgr, labbott, lgoncalv, linville, masami256, matt, mchehab, mcressma, mjg59, mlangsdo, nmurray, plougher, qzhao, rt-maint, rvrbovsk, steved, williams
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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Bug Depends On: 1774947    
Bug Blocks: 1774948    

Description Marian Rehak 2019-11-21 10:23:25 UTC
A memory leak in the predicate_parse() function in kernel/trace/trace_events_filter.c in the Linux kernel through 5.3.11 allows attackers to cause a DoS (memory consumption).

Upstream Reference:

https://github.com/torvalds/linux/commit/96c5c6e6a5b6db592acae039fed54b5c8844cd35

Comment 1 Marian Rehak 2019-11-21 10:23:45 UTC
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1774947]

Comment 2 Evgenii Shatokhin 2019-11-22 16:06:01 UTC
Only root can manipulate ftrace filters, right?

Is there a way for an unprivileged user to trigger this memory leak?