Bug 1776852 (CVE-2019-19076) - CVE-2019-19076 kernel: memory leak in the nfp_abm_u32_knode_replace() function in drivers/net/ethernet/netronome/nfp/abm/cls.c leads to DoS
Summary: CVE-2019-19076 kernel: memory leak in the nfp_abm_u32_knode_replace() functio...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2019-19076
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: 1776853 1820479 1820480
Blocks: 1776854
TreeView+ depends on / blocked
 
Reported: 2019-11-26 13:48 UTC by Guilherme de Almeida Suckevicz
Modified: 2021-10-25 22:14 UTC (History)
42 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 Advanced buffer management NIC driver in the Linux kernel handled memory release on error handling. This flaw allows an attacker to cause a denial of service and crash the system.
Clone Of:
Environment:
Last Closed: 2021-10-25 22:14:00 UTC
Embargoed:

Attachments (Terms of Use)

Description Guilherme de Almeida Suckevicz 2019-11-26 13:48:14 UTC 
A memory leak in the nfp_abm_u32_knode_replace() function in drivers/net/ethernet/netronome/nfp/abm/cls.c in the Linux kernel before 5.3.6 allows attackers to cause a denial of service (memory consumption), aka CID-78beef629fd9.

Reference and upstream commit:
https://github.com/torvalds/linux/commit/78beef629fd95be4ed853b2d37b832f766bd96ca
Comment 1 Guilherme de Almeida Suckevicz 2019-11-26 13:48:46 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1776853]
Comment 2 Justin M. Forbes 2019-11-26 14:19:50 UTC 
This was fixed for Fedora in 5.3.6 stable kernel updates.
Comment 3 Petr Matousek 2020-04-03 07:51:05 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 07:51:09 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.
Note You need to log in before you can comment on or make changes to this bug.