Bug 1763869 (CVE-2019-15924) - CVE-2019-15924 kernel: null pointer dereference in drivers/net/ethernet/intel/fm10k/fm10k_main.c
Summary: CVE-2019-15924 kernel: null pointer dereference in drivers/net/ethernet/intel...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2019-15924
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: 1763870 1781387 1820463 1820464 1820465 1832214 1832215
Blocks: 1763871
TreeView+ depends on / blocked
 
Reported: 2019-10-21 19:21 UTC by Guilherme de Almeida Suckevicz
Modified: 2021-10-25 09:55 UTC (History)
41 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
A flaw was found in the way the fm10k driver in the Linux kernel reacted to memory-related errors during driver initialization. This flaw allows a local attacker to cause a denial of service and crash the system.
Clone Of:
Environment:
Last Closed: 2021-10-25 09:55:29 UTC


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Description Guilherme de Almeida Suckevicz 2019-10-21 19:21:22 UTC
An issue was discovered in the Linux kernel before 5.0.11. fm10k_init_module in drivers/net/ethernet/intel/fm10k/fm10k_main.c has a NULL pointer dereference because there is no -ENOMEM upon an alloc_workqueue failure.

Reference:
https://github.com/torvalds/linux/commit/01ca667133d019edc9f0a1f70a272447c84ec41f

Comment 1 Guilherme de Almeida Suckevicz 2019-10-21 19:21:41 UTC
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1763870]

Comment 2 Justin M. Forbes 2019-10-22 12:58:09 UTC
This was fixed for Fedora with the 5.0.11 stable kernel update.

Comment 3 Petr Matousek 2020-04-03 06:45:39 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 06:45:43 UTC
Mitigation:

To mitigate this issue, prevent module fm10k 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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