Bug 1775000 (CVE-2019-19065) - CVE-2019-19065 kernel: A memory leak in the sdma_init() function in drivers/infiniband/hw/hfi1/sdma.c allows for a DoS
Summary: CVE-2019-19065 kernel: A memory leak in the sdma_init() function in drivers/i...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2019-19065
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: 1719676 1775001 1829529 1829530 1829531 1829532
Blocks: 1775003
TreeView+ depends on / blocked
 
Reported: 2019-11-21 11:16 UTC by Marian Rehak
Modified: 2021-10-25 22:14 UTC (History)
42 users (show)

Fixed In Version:
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Doc Text:
A flaw was found in the Linux kernel. The Intel OPA Gen1 driver mishandles resource cleanup. An attacker able to induce low memory condition on the system could use this flaw to crash the system. The highest threat from this vulnerability is to system availability.
Clone Of:
Environment:
Last Closed: 2021-10-25 22:14:10 UTC
Embargoed:

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Description Marian Rehak 2019-11-21 11:16:24 UTC 
A memory leak in the sdma_init() function in drivers/infiniband/hw/hfi1/sdma.c in the Linux kernel before 5.3.9 allows attackers to cause a denial of service (memory consumption) by triggering rhashtable_init() failures.

Upstream Issue:

https://github.com/torvalds/linux/commit/34b3be18a04ecdc610aae4c48e5d1b799d8689f6
Comment 1 Marian Rehak 2019-11-21 11:16:43 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1775001]
Comment 2 Justin M. Forbes 2019-11-21 16:44:20 UTC 
This was fixed for Fedora with the 5.3.9 stable kernel update.
Comment 5 Petr Matousek 2020-04-29 17:49:03 UTC 
Statement:

This issue is rated as having Low impact because of the preconditions needed to trigger the resource cleanup code path (system-wide out-of-memory condition).
Comment 6 Petr Matousek 2020-04-29 17:49:06 UTC 
Mitigation:

In order to mitigate this issue it is possible to prevent the affected code from being loaded by blacklisting the kernel module hfi1. For instructions relating to how to blacklist a kernel module refer to: https://access.redhat.com/solutions/41278 .
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