Bug 1993988 (CVE-2021-3715) - CVE-2021-3715 kernel: use-after-free in route4_change() in net/sched/cls_route.c
Summary: CVE-2021-3715 kernel: use-after-free in route4_change() in net/sched/cls_route.c
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2021-3715
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: 1824071 1992926 1994012 1994013 1994014 1994015 1994016 1994018 1994019 1994020 1994463 1996610 1996611 1997195 1997756 CVE-2022-2588 2122585 2132973
Blocks: 1993312 2002252
TreeView+ depends on / blocked
 
Reported: 2021-08-16 13:49 UTC by Petr Matousek
Modified: 2025-04-04 13:07 UTC (History)
61 users (show)

Fixed In Version: Kernel 5.10
Clone Of:
Environment:
Last Closed: 2021-09-07 20:33:34 UTC
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2021:3438 0 None None None 2021-09-07 15:26:57 UTC
Red Hat Product Errata RHSA-2021:3439 0 None None None 2021-09-07 14:57:43 UTC
Red Hat Product Errata RHSA-2021:3441 0 None None None 2021-09-07 15:25:59 UTC
Red Hat Product Errata RHSA-2021:3442 0 None None None 2021-09-07 14:56:45 UTC
Red Hat Product Errata RHSA-2021:3443 0 None None None 2021-09-07 15:07:10 UTC
Red Hat Product Errata RHSA-2021:3444 0 None None None 2021-09-07 15:21:07 UTC
Red Hat Product Errata RHSA-2021:3445 0 None None None 2021-09-07 15:14:21 UTC
Red Hat Product Errata RHSA-2021:3446 0 None None None 2021-09-07 16:46:57 UTC
Red Hat Product Errata RHSA-2021:3477 0 None None None 2021-09-09 09:22:22 UTC
Red Hat Product Errata RHSA-2022:7173 0 None None None 2022-10-25 13:11:01 UTC

Description Petr Matousek 2021-08-16 13:49:46 UTC 
A flaw was found in the way the "Routing decision" classifier in the Linux kernel's Traffic Control networking subsystem handled changing of classification filters leading to user-after-free condition. An unprivileged local user could use this flaw to escalate their privileges on the system.

Upstream patch:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ef299cc3fa1a9e1288665a9fdc8bff55629fd359
Comment 24 errata-xmlrpc 2021-09-07 14:56:41 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 25 errata-xmlrpc 2021-09-07 14:57:40 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2021:3439 https://access.redhat.com/errata/RHSA-2021:3439
Comment 26 errata-xmlrpc 2021-09-07 15:07:06 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 27 errata-xmlrpc 2021-09-07 15:14:17 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.2 Extended Update Support

Via RHSA-2021:3445 https://access.redhat.com/errata/RHSA-2021:3445
Comment 28 errata-xmlrpc 2021-09-07 15:21:04 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 29 errata-xmlrpc 2021-09-07 15:25:56 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2021:3441 https://access.redhat.com/errata/RHSA-2021:3441
Comment 30 errata-xmlrpc 2021-09-07 15:26:54 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2021:3438 https://access.redhat.com/errata/RHSA-2021:3438
Comment 31 errata-xmlrpc 2021-09-07 16:46:53 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 32 Product Security DevOps Team 2021-09-07 20:33:34 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-2021-3715
Comment 34 errata-xmlrpc 2021-09-09 09:22:17 UTC 
This issue has been addressed in the following products:

  Red Hat Virtualization 4 for Red Hat Enterprise Linux 7

Via RHSA-2021:3477 https://access.redhat.com/errata/RHSA-2021:3477
Comment 36 errata-xmlrpc 2022-10-25 13:10:55 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7.6 Update Services for SAP Solutions

Via RHSA-2022:7173 https://access.redhat.com/errata/RHSA-2022:7173
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