Bug 1986506 (CVE-2021-37576) - CVE-2021-37576 kernel: powerpc: KVM guest OS users can cause host OS memory corruption
Summary: CVE-2021-37576 kernel: powerpc: KVM guest OS users can cause host OS memory c...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2021-37576
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1986507 1988212 1988214 1988215 1988216 1988217 1988218 1988219 1988220 1988221 1988222 1988223 1988224 1988225 1988226 1988227 1988228 1988229 1988230
Blocks: 1986508
TreeView+ depends on / blocked
 
Reported: 2021-07-27 17:38 UTC by Guilherme de Almeida Suckevicz
Modified: 2022-04-17 21:31 UTC (History)
53 users (show)

Fixed In Version: kernel 5.14-4rc3
Doc Type: If docs needed, set a value
Doc Text:
A flaw was found on the Linux kernel. On the PowerPC platform, the KVM guest allows the OS users to cause host OS memory corruption via rtas_args.nargs. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
Clone Of:
Environment:
Last Closed: 2021-09-07 14:33:23 UTC


Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2021:3847 0 None None None 2021-10-13 14:32:47 UTC
Red Hat Product Errata RHBA-2021:3862 0 None None None 2021-10-14 13:47:43 UTC
Red Hat Product Errata RHBA-2021:3867 0 None None None 2021-10-14 14:14:49 UTC
Red Hat Product Errata RHBA-2021:3898 0 None None None 2021-10-19 01:16:14 UTC
Red Hat Product Errata RHBA-2021:3911 0 None None None 2021-10-19 09:11:16 UTC
Red Hat Product Errata RHSA-2021:3436 0 None None None 2021-09-07 09:56:02 UTC
Red Hat Product Errata RHSA-2021:3442 0 None None None 2021-09-07 14:56:40 UTC
Red Hat Product Errata RHSA-2021:3443 0 None None None 2021-09-07 15:07:05 UTC
Red Hat Product Errata RHSA-2021:3444 0 None None None 2021-09-07 15:20:59 UTC
Red Hat Product Errata RHSA-2021:3446 0 None None None 2021-09-07 16:46:54 UTC
Red Hat Product Errata RHSA-2021:3447 0 None None None 2021-09-07 18:00:33 UTC
Red Hat Product Errata RHSA-2021:3725 0 None None None 2021-10-05 07:52:59 UTC
Red Hat Product Errata RHSA-2021:3766 0 None None None 2021-10-12 07:44:14 UTC
Red Hat Product Errata RHSA-2021:3768 0 None None None 2021-10-12 09:34:32 UTC
Red Hat Product Errata RHSA-2021:3801 0 None None None 2021-10-12 15:29:14 UTC
Red Hat Product Errata RHSA-2021:3812 0 None None None 2021-10-12 15:05:04 UTC
Red Hat Product Errata RHSA-2021:3814 0 None None None 2021-10-12 15:05:34 UTC
Red Hat Product Errata RHSA-2021:3987 0 None None None 2021-10-26 07:38:12 UTC
Red Hat Product Errata RHSA-2021:4000 0 None None None 2021-10-26 16:21:10 UTC

Description Guilherme de Almeida Suckevicz 2021-07-27 17:38:26 UTC
arch/powerpc/kvm/book3s_rtas.c in the Linux kernel on the powerpc platform allows KVM guest OS users to cause host OS memory corruption via syscalls from the guest.

Reference:
https://lore.kernel.org/linuxppc-dev/87im0x1lqi.fsf@mpe.ellerman.id.au/T/#u

Upstream patch:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=f62f3c20647ebd5fb6ecb8f0b477b9281c44c10a

Comment 1 Guilherme de Almeida Suckevicz 2021-07-27 17:42:27 UTC
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 1986507]

Comment 13 Wade Mealing 2021-08-02 01:47:49 UTC
Ah, i'll fix that now.

Comment 14 errata-xmlrpc 2021-09-07 09:55:58 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2021:3436 https://access.redhat.com/errata/RHSA-2021:3436

Comment 15 Product Security DevOps Team 2021-09-07 14:33:23 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-2021-37576

Comment 16 errata-xmlrpc 2021-09-07 14:56:38 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.1 Extended Update Support

Via RHSA-2021:3442 https://access.redhat.com/errata/RHSA-2021:3442

Comment 17 errata-xmlrpc 2021-09-07 15:07:03 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.2 Extended Update Support

Via RHSA-2021:3443 https://access.redhat.com/errata/RHSA-2021:3443

Comment 18 errata-xmlrpc 2021-09-07 15:20:56 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.1 Extended Update Support

Via RHSA-2021:3444 https://access.redhat.com/errata/RHSA-2021:3444

Comment 19 errata-xmlrpc 2021-09-07 16:46:50 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.2 Extended Update Support

Via RHSA-2021:3446 https://access.redhat.com/errata/RHSA-2021:3446

Comment 20 errata-xmlrpc 2021-09-07 18:00:30 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2021:3447 https://access.redhat.com/errata/RHSA-2021:3447

Comment 21 errata-xmlrpc 2021-10-05 07:52:56 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7.4 Advanced Update Support

Via RHSA-2021:3725 https://access.redhat.com/errata/RHSA-2021:3725

Comment 22 errata-xmlrpc 2021-10-12 07:44:10 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7.3 Advanced Update Support

Via RHSA-2021:3766 https://access.redhat.com/errata/RHSA-2021:3766

Comment 23 errata-xmlrpc 2021-10-12 09:34:29 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2021:3768 https://access.redhat.com/errata/RHSA-2021:3768

Comment 24 errata-xmlrpc 2021-10-12 15:05:01 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-2021:3812 https://access.redhat.com/errata/RHSA-2021:3812

Comment 25 errata-xmlrpc 2021-10-12 15:05:31 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7.6 Update Services for SAP Solutions

Via RHSA-2021:3814 https://access.redhat.com/errata/RHSA-2021:3814

Comment 26 errata-xmlrpc 2021-10-12 15:29:11 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2021:3801 https://access.redhat.com/errata/RHSA-2021:3801

Comment 27 errata-xmlrpc 2021-10-26 07:38:09 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-2021:3987 https://access.redhat.com/errata/RHSA-2021:3987

Comment 28 errata-xmlrpc 2021-10-26 16:21:06 UTC
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7.7 Update Services for SAP Solutions

Via RHSA-2021:4000 https://access.redhat.com/errata/RHSA-2021:4000


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