Bug 2283390 (CVE-2021-47559)

Summary:	CVE-2021-47559 kernel: net/smc: Fix NULL pointer dereferencing in smc_vlan_by_tcpsk()
Product:	[Other] Security Response	Reporter:	ybuenos
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	acaringi, allarkin, aquini, bhu, chwhite, cye, cyin, dbohanno, debarbos, dfreiber, drow, dvlasenk, esandeen, ezulian, hkrzesin, jarod, jburrell, jdenham, jfaracco, jlelli, joe.lawrence, jshortt, jstancek, jwyatt, kcarcia, ldoskova, lgoncalv, lzampier, mleitner, mmilgram, mstowell, nmurray, ptalbert, rkeshri, rparrazo, rrobaina, rvrbovsk, scweaver, sidakwo, sukulkar, tglozar, vkumar, wcosta, williams, wmealing, ycote, ykopkova, zhijwang
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:	kernel 5.10.83, kernel 5.15.6, kernel 5.16	Doc Type:	If docs needed, set a value
Doc Text:	A vulnerability was found in the Linux kernel's SMC implementation in the smc_vlan_by_tcpsk() function. A potential NULL pointer dereference occurred when handling lower network devices, leading to system crashes and resulting in denial of service.	Story Points:	---
Clone Of:		Environment:
Last Closed:		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:
Bug Blocks:	2283496

Description ybuenos 2024-05-27 09:36:45 UTC

In the Linux kernel, the following vulnerability has been resolved:

net/smc: Fix NULL pointer dereferencing in smc_vlan_by_tcpsk()

The Linux kernel CVE team has assigned CVE-2021-47559 to this issue.

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024052450-CVE-2021-47559-9909@gregkh/T

Comment 2 Alex 2024-06-09 16:14:14 UTC

The result of automatic check (that is developed by Alexander Larkin) for this CVE-2021-47559 is: CHECK	Maybe valid. Check manually. with impact MODERATE (that is an approximation based on flags NULLPTR  ; these flags parsed automatically based on patch data). Such automatic check happens only for Low/Moderates (and only when not from reporter, but parsing already existing CVE). Highs always checked manually (I check it myself and then we check it again in Remediation team). In rare cases some of the Moderates could be increased to High later.

Comment 10 errata-xmlrpc 2024-09-24 00:24:34 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions

Via RHSA-2024:6990 https://access.redhat.com/errata/RHSA-2024:6990

Comment 11 errata-xmlrpc 2024-09-24 00:48:24 UTC

This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions

Via RHSA-2024:6991 https://access.redhat.com/errata/RHSA-2024:6991