Bug 2282896 (CVE-2021-47461) - CVE-2021-47461 kernel: userfaultfd: fix a race between writeprotect and exit_mmap()
Summary: CVE-2021-47461 kernel: userfaultfd: fix a race between writeprotect and exit_...
Keywords:
Status: NEW
Alias: CVE-2021-47461
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks: 2283370
TreeView+ depends on / blocked
 
Reported: 2024-05-23 09:33 UTC by ybuenos
Modified: 2024-11-26 00:48 UTC (History)
50 users (show)

Fixed In Version: kernel 5.10.76, kernel 5.14.15, kernel 5.15
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2024:5117 0 None None None 2024-08-08 08:34:23 UTC
Red Hat Product Errata RHBA-2024:5207 0 None None None 2024-08-12 07:52:10 UTC
Red Hat Product Errata RHBA-2024:5208 0 None None None 2024-08-12 08:35:27 UTC
Red Hat Product Errata RHBA-2024:5233 0 None None None 2024-08-12 13:52:51 UTC
Red Hat Product Errata RHBA-2024:5235 0 None None None 2024-08-12 14:25:35 UTC
Red Hat Product Errata RHBA-2024:5236 0 None None None 2024-08-12 14:41:33 UTC
Red Hat Product Errata RHBA-2024:5237 0 None None None 2024-08-12 14:45:05 UTC
Red Hat Product Errata RHBA-2024:5386 0 None None None 2024-08-14 10:49:23 UTC
Red Hat Product Errata RHBA-2024:5866 0 None None None 2024-08-26 14:41:40 UTC
Red Hat Product Errata RHSA-2024:10262 0 None None None 2024-11-26 00:48:14 UTC
Red Hat Product Errata RHSA-2024:5101 0 None None None 2024-08-08 04:56:23 UTC
Red Hat Product Errata RHSA-2024:5102 0 None None None 2024-08-08 04:44:46 UTC
Red Hat Product Errata RHSA-2024:6297 0 None None None 2024-09-04 07:19:09 UTC

Description ybuenos 2024-05-23 09:33:30 UTC 
In the Linux kernel, the following vulnerability has been resolved:

userfaultfd: fix a race between writeprotect and exit_mmap()

The Linux kernel CVE team has assigned CVE-2021-47461 to this issue.

Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2024052225-CVE-2021-47461-a472@gregkh/T
Comment 3 Alex 2024-06-09 16:09:08 UTC 
The result of automatic check (that is developed by Alexander Larkin) for this CVE-2021-47461 is: CHECK	Maybe valid. Check manually. with impact MODERATE (that is an approximation based on flags READ KASAN DISK SIMPLEFIX RACE  ; 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 11 errata-xmlrpc 2024-08-08 04:44:42 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2024:5102 https://access.redhat.com/errata/RHSA-2024:5102
Comment 12 errata-xmlrpc 2024-08-08 04:56:20 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2024:5101 https://access.redhat.com/errata/RHSA-2024:5101
Comment 13 errata-xmlrpc 2024-09-04 07:19:06 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
  Red Hat Enterprise Linux 8.6 Update Services for SAP Solutions
  Red Hat Enterprise Linux 8.6 Telecommunications Update Service

Via RHSA-2024:6297 https://access.redhat.com/errata/RHSA-2024:6297
Comment 15 errata-xmlrpc 2024-11-26 00:48:10 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.8 Extended Update Support

Via RHSA-2024:10262 https://access.redhat.com/errata/RHSA-2024:10262
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