Bug 2044809 (CVE-2022-22942)

Summary: CVE-2022-22942 kernel: failing usercopy allows for use-after-free exploitation
Product: [Other] Security Response Reporter: Marian Rehak <mrehak>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: acaringi, adscvr, airlied, alciregi, asavkov, bhu, brdeoliv, bskeggs, chwhite, crwood, ctoe, dhoward, dvlasenk, fhrbata, fpacheco, hdegoede, hkrzesin, jarod, jarodwilson, jburrell, jeremy, jfaracco, jforbes, jglisse, jlelli, joe.lawrence, jonathan, josef, jpoimboe, jshortt, jstancek, jthierry, jwboyer, kcarcia, kernel-maint, kernel-mgr, kpatch-maint, kyoshida, lgoncalv, linville, lzampier, masami256, mchehab, michal.skrivanek, mperina, nmurray, nobody, ptalbert, qzhao, rhandlin, rvrbovsk, sbonazzo, scweaver, security-response-team, steved, vkumar, walters, williams, ycote
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
Whiteboard:
Fixed In Version: Kernel 5.16 Doc Type: If docs needed, set a value
Doc Text:
A use-after-free flaw was found in the Linux kernel’s vmw_execbuf_copy_fence_user function in drivers/gpu/drm/vmwgfx/vmwgfx_execbuf.c in vmwgfx. This flaw allows a local attacker with user privileges to cause a privilege escalation problem.
 Story Points: ---
Clone Of: Environment:
Last Closed: 2022-05-11 15:46:51 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: 2047593, 2047594, 2047595, 2047596, 2047597, 2047598, 2047599, 2047600, 2047601, 2047602, 2047603, 2047604, 2047605, 2047606, 2047607, 2047608, 2047609, 2047610, 2047611, 2047612, 2047613, 2047614, 2047615, 2047616, 2047617, 2047618, 2047619, 2047620, 2050116, 2050117, 2055098, 2056599    
Bug Blocks: 2044792    

Description Marian Rehak 2022-01-25 09:07:05 UTC 
A failing usercopy of the fence_rep object will lead to a stale entry in the file descriptor table as put_unused_fd() won't release it. This enables userland to refer to a dangling 'file' object through that still valid file descriptor, leading to all kinds of use-after-free exploitation scenarios.
Comment 11 Sandro Bonazzola 2022-02-16 09:55:31 UTC 
Created oVirt tracking bug for this issue:

Affects: oVirt Node 4.4 [ bug #2055098 ]
Comment 13 errata-xmlrpc 2022-02-22 09:12:41 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2022:0592 https://access.redhat.com/errata/RHSA-2022:0592
Comment 14 errata-xmlrpc 2022-02-22 16:58:26 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2022:0620 https://access.redhat.com/errata/RHSA-2022:0620
Comment 15 errata-xmlrpc 2022-02-22 17:01:05 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2022:0622 https://access.redhat.com/errata/RHSA-2022:0622
Comment 16 errata-xmlrpc 2022-03-08 15:04:30 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.4 Extended Update Support

Via RHSA-2022:0771 https://access.redhat.com/errata/RHSA-2022:0771
Comment 17 errata-xmlrpc 2022-03-08 15:55:36 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.4 Extended Update Support

Via RHSA-2022:0772 https://access.redhat.com/errata/RHSA-2022:0772
Comment 18 errata-xmlrpc 2022-03-08 17:50:54 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.4 Extended Update Support

Via RHSA-2022:0777 https://access.redhat.com/errata/RHSA-2022:0777
Comment 19 errata-xmlrpc 2022-03-10 15:04:24 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2022:0819 https://access.redhat.com/errata/RHSA-2022:0819
Comment 20 errata-xmlrpc 2022-03-10 15:13:34 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.2 Extended Update Support

Via RHSA-2022:0821 https://access.redhat.com/errata/RHSA-2022:0821
Comment 21 errata-xmlrpc 2022-03-10 15:32:06 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.1 Update Services for SAP Solutions

Via RHSA-2022:0823 https://access.redhat.com/errata/RHSA-2022:0823
Comment 22 errata-xmlrpc 2022-03-10 15:54:31 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.2 Extended Update Support

Via RHSA-2022:0820 https://access.redhat.com/errata/RHSA-2022:0820
Comment 23 errata-xmlrpc 2022-03-10 16:15:44 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2022:0825 https://access.redhat.com/errata/RHSA-2022:0825
Comment 24 errata-xmlrpc 2022-03-14 09:23:03 UTC 
This issue has been addressed in the following products:

  Red Hat Virtualization 4 for Red Hat Enterprise Linux 8

Via RHSA-2022:0841 https://access.redhat.com/errata/RHSA-2022:0841
Comment 25 errata-xmlrpc 2022-03-14 10:19:44 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.1 Update Services for SAP Solutions

Via RHSA-2022:0851 https://access.redhat.com/errata/RHSA-2022:0851
Comment 26 errata-xmlrpc 2022-03-14 10:48:40 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2022:0849 https://access.redhat.com/errata/RHSA-2022:0849
Comment 27 errata-xmlrpc 2022-03-15 13:36:51 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.2 Extended Update Support

Via RHSA-2022:0925 https://access.redhat.com/errata/RHSA-2022:0925
Comment 28 errata-xmlrpc 2022-03-17 16:28:13 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.1 Update Services for SAP Solutions

Via RHSA-2022:0958 https://access.redhat.com/errata/RHSA-2022:0958
Comment 29 errata-xmlrpc 2022-03-29 09:07:26 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7.6 Update Services for SAP Solutions

Via RHSA-2022:1103 https://access.redhat.com/errata/RHSA-2022:1103
Comment 30 errata-xmlrpc 2022-03-29 09:54:51 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7.6 Advanced Update Support
  Red Hat Enterprise Linux 7.6 Update Services for SAP Solutions
  Red Hat Enterprise Linux 7.6 Telco Extended Update Support

Via RHSA-2022:1107 https://access.redhat.com/errata/RHSA-2022:1107
Comment 32 errata-xmlrpc 2022-04-07 09:03:23 UTC 
This issue has been addressed in the following products:

  Red Hat Virtualization 4 for Red Hat Enterprise Linux 7

Via RHSA-2022:1263 https://access.redhat.com/errata/RHSA-2022:1263
Comment 33 errata-xmlrpc 2022-04-12 15:37:19 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7.7 Advanced Update Support
  Red Hat Enterprise Linux 7.7 Update Services for SAP Solutions
  Red Hat Enterprise Linux 7.7 Telco Extended Update Support

Via RHSA-2022:1324 https://access.redhat.com/errata/RHSA-2022:1324
Comment 34 errata-xmlrpc 2022-04-13 19:58:50 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7.7 Update Services for SAP Solutions

Via RHSA-2022:1373 https://access.redhat.com/errata/RHSA-2022:1373
Comment 35 Product Security DevOps Team 2022-05-11 15:46:46 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-2022-22942