Bug 1776372 (CVE-2019-19080) - CVE-2019-19080 kernel: memory leaks in the nfp_flower_spawn_phy_reprs() function in drivers/net/ethernet/netronome/nfp/flower/main.c leads to DoS
Summary: CVE-2019-19080 kernel: memory leaks in the nfp_flower_spawn_phy_reprs() funct...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2019-19080
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: 1776373 1820496 1820497 1820498 1820499
Blocks: 1776374
TreeView+ depends on / blocked
 
Reported: 2019-11-25 14:37 UTC by Guilherme de Almeida Suckevicz
Modified: 2021-10-25 22:13 UTC (History)
42 users (show)

Fixed In Version:
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Doc Text:
A flaw was found in the way the NFP4000/NFP6000 TC Flower offload functionality in the Linux kernel handled memory cleanup on failures. This flaw allows an attacker to cause a denial of service and crash the system.
Clone Of:
Environment:
Last Closed: 2021-10-25 22:13:20 UTC
Embargoed:

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Description Guilherme de Almeida Suckevicz 2019-11-25 14:37:24 UTC 
Four memory leaks in the nfp_flower_spawn_phy_reprs() function in drivers/net/ethernet/netronome/nfp/flower/main.c in the Linux kernel before 5.3.4 allow attackers to cause a denial of service (memory consumption), aka CID-8572cea1461a.

Reference and upstream commit:
https://github.com/torvalds/linux/commit/8572cea1461a006bce1d06c0c4b0575869125fa4
Comment 1 Guilherme de Almeida Suckevicz 2019-11-25 14:38:10 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1776373]
Comment 2 Justin M. Forbes 2019-11-25 15:55:39 UTC 
This was fixed for Fedora with the 5.3.4 stable kernel updates.
Comment 3 Petr Matousek 2020-04-03 08:03:45 UTC 
Statement:

This issue is rated as having Low impact because of the low memory conditions needed to trigger this issue.
Comment 4 Petr Matousek 2020-04-03 08:03:49 UTC 
Mitigation:

To mitigate this issue, prevent module nfp from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically.
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