Bug 1776375 (CVE-2019-19081) - CVE-2019-19081 kernel: memory leak in the nfp_flower_spawn_vnic_reprs() function in drivers/net/ethernet/netronome/nfp/flower/main.c leads to DoS
Summary: CVE-2019-19081 kernel: memory leak in the nfp_flower_spawn_vnic_reprs() funct...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2019-19081
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: 1776376 1820487 1820488 1820489 1820490
Blocks: 1776377
TreeView+ depends on / blocked
 
Reported: 2019-11-25 14:44 UTC by Guilherme de Almeida Suckevicz
Modified: 2021-10-25 22:13 UTC (History)
43 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
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 22:13:29 UTC


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Description Guilherme de Almeida Suckevicz 2019-11-25 14:44:24 UTC
A memory leak in the nfp_flower_spawn_vnic_reprs() function in drivers/net/ethernet/netronome/nfp/flower/main.c in the Linux kernel before 5.3.4 allows attackers to cause a denial of service (memory consumption), aka CID-8ce39eb5a67a.

Reference and upstream commit:
https://github.com/torvalds/linux/commit/8ce39eb5a67aee25d9f05b40b673c95b23502e3e

Comment 1 Guilherme de Almeida Suckevicz 2019-11-25 14:45:28 UTC
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1776376]

Comment 2 Justin M. Forbes 2019-11-25 15:57:03 UTC
This was fixed for Fedora with the 5.3.4 stable kernel updates.

Comment 4 Petr Matousek 2020-04-03 08:02:54 UTC
Statement:

This issue is rated as having Low impact because of the low memory conditions needed to trigger this issue.

Comment 5 Petr Matousek 2020-04-03 08:02:58 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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