Bug 2122960 (CVE-2022-41218) - CVE-2022-41218 kernel: Report vmalloc UAF in dvb-core/dmxdev
Summary: CVE-2022-41218 kernel: Report vmalloc UAF in dvb-core/dmxdev
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2022-41218
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2123301 2123302 2123303 2123304 2137259
Blocks: 2122950
TreeView+ depends on / blocked
 
Reported: 2022-08-31 12:53 UTC by Alex
Modified: 2024-02-13 01:11 UTC (History)
51 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
A use-after-free flaw was found in the Linux kernel’s dvb-core subsystem (DVB API used by Digital TV devices) in how a user physically removed a USB device (such as a DVB demultiplexer device) while running malicious code. This flaw allows a local user to crash or potentially escalate their privileges on the system.
Clone Of:
Environment:
Last Closed: 2023-05-16 19:15:56 UTC
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2023:2736 0 None None None 2023-05-16 08:04:59 UTC
Red Hat Product Errata RHSA-2023:2951 0 None None None 2023-05-16 08:33:52 UTC
Red Hat Product Errata RHSA-2024:0412 0 None None None 2024-01-24 16:42:43 UTC

Description Alex 2022-08-31 12:53:27 UTC 
A flaw in the Linux Kernel dvb-core sub system (DVB API used by Digital TV devices) found.
The result of race condition inside drivers/media/dvb-core/dmxdev.c is use after free.
For triggering attack the local user have to physically remove USB device (like DVB demultiplexer device), and both run some malicious code.

Reference:
https://www.openwall.com/lists/oss-security/2022/09/23/4
Comment 3 Alex 2022-10-24 09:03:51 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2137259]
Comment 4 Alex 2022-12-07 10:02:52 UTC 
Patch:
https://lore.kernel.org/all/20220908132754.30532-1-tiwai@suse.de/
Comment 7 Justin M. Forbes 2023-01-19 22:59:26 UTC 
This was fixed for Fedora with the 6.0.18 stable kernel updates.
Comment 10 errata-xmlrpc 2023-05-16 08:04:56 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2023:2736 https://access.redhat.com/errata/RHSA-2023:2736
Comment 11 errata-xmlrpc 2023-05-16 08:33:48 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2023:2951 https://access.redhat.com/errata/RHSA-2023:2951
Comment 12 Product Security DevOps Team 2023-05-16 19:15:53 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-2022-41218
Comment 15 errata-xmlrpc 2024-01-24 16:42:39 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.6 Extended Update Support

Via RHSA-2024:0412 https://access.redhat.com/errata/RHSA-2024:0412
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