Bug 1759052 (CVE-2019-15925)

Summary:	CVE-2019-15925 kernel: out-of-bounds access in function hclge_tm_schd_mode_vnet_base_cfg
Product:	[Other] Security Response	Reporter:	Dhananjay Arunesh <darunesh>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED ERRATA	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	acaringi, airlied, bdettelb, bhu, blc, brdeoliv, bskeggs, dhoward, dvlasenk, esammons, fhrbata, hdegoede, hkrzesin, iboverma, ichavero, itamar, jarodwilson, jeremy, jforbes, jglisse, jlelli, john.j5live, jonathan, josef, jross, jshortt, jstancek, jwboyer, kernel-maint, kernel-mgr, lgoncalv, linville, masami256, matt, mchehab, mcressma, mjg59, mlangsdo, nmurray, rt-maint, rvrbovsk, steved, williams
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
Doc Text:	An out-of-bounds access flaw was found in the hclge_shaper_para_calc driver in the Linux kernel. Access to an array with an index higher than its maximum index will lead to an out-of-bounds access vulnerability. This could affect both data confidentiality and integrity as well as system availability.	Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-11-04 02:21:43 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	1759053, 1809057, 1809058, 1809059
Bug Blocks:	1759055

Description Dhananjay Arunesh 2019-10-07 10:12:19 UTC

An issue was discovered in the Linux kernel. An out of bounds access exists in the function hclge_tm_schd_mode_vnet_base_cfg in the file drivers/net/ethernet/hisilicon/hns3/hns3pf/hclge_tm.c.

Reference:
https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.2.3
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=04f25edb48c441fc278ecc154c270f16966cbb90

Comment 1 Dhananjay Arunesh 2019-10-07 10:12:51 UTC

Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1759053]

Comment 2 Justin M. Forbes 2019-10-07 14:21:22 UTC

This was fixed for Fedora with the 5.2.3 stable updates.

Comment 6 Eric Christensen 2020-03-12 15:59:08 UTC

Mitigation:

Blacklisting the affected HCLGE driver module until a patch is available can be done using the blacklist mechanism. This will ensure the driver is not loaded at boot time.  For instructions on how to black list a kernel module, please read: https://access.redhat.com/solutions/41278.

Comment 7 errata-xmlrpc 2020-11-04 00:49:18 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2020:4431 https://access.redhat.com/errata/RHSA-2020:4431

Comment 8 errata-xmlrpc 2020-11-04 02:21:01 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2020:4609 https://access.redhat.com/errata/RHSA-2020:4609

Comment 9 Product Security DevOps Team 2020-11-04 02:21:43 UTC

This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2019-15925