Bug 1775187 (CVE-2019-19036)

Summary: CVE-2019-19036 kernel: null-pointer dereference in btrfs_root_node in fs/btrfs/ctree.c
Product: [Other] Security Response Reporter: Dhananjay Arunesh <darunesh>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: NEW --- QA Contact:
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Priority: medium    
Version: unspecifiedCC: acaringi, airlied, bdettelb, bhu, blc, brdeoliv, bskeggs, dhoward, dvlasenk, esammons, 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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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 1775189    
Bug Blocks: 1775188    

Description Dhananjay Arunesh 2019-11-21 14:34:18 UTC
A vulnerability was found in btrfs_root_node in fs/btrfs/ctree.c in the Linux kernel through 5.3.12 allows a NULL pointer dereference because rcu_dereference(root->node) can be zero.

Reference:
https://github.com/bobfuzzer/CVE/tree/master/CVE-2019-19036

Comment 1 Dhananjay Arunesh 2019-11-21 14:35:25 UTC
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1775189]