Bug 2148513 (CVE-2022-45885) - CVE-2022-45885 kernel: use-after-free due to race condition occurring in dvb_frontend.c
Summary: CVE-2022-45885 kernel: use-after-free due to race condition occurring in dvb_...
Keywords:
Status: NEW
Alias: CVE-2022-45885
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Nobody
QA Contact:
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Depends On: 2148514 2153554 2153555 2153556 2153557 2153558 2153559
Blocks: 2150349
TreeView+ depends on / blocked
 
Reported: 2022-11-25 17:40 UTC by Guilherme de Almeida Suckevicz
Modified: 2023-09-25 16:54 UTC (History)
35 users (show)

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A race condition flaw leading to a use-after-free issue was found in the Linux kernel media subsystem in the DVB core device driver. It could occur in the dvb_frontend() function when closing the device node of dvb_frontend if the device is disconnected. A local user could use this flaw to crash the system or potentially escalate their privileges on the system.
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Description Guilherme de Almeida Suckevicz 2022-11-25 17:40:19 UTC 
An issue was discovered in the Linux kernel through 6.0.9. drivers/media/dvb-core/dvb_frontend.c has a race condition that can cause a use-after-free when a device is disconnected.

References:
https://lore.kernel.org/linux-media/20221115131822.6640-2-imv4bel@gmail.com/
https://lore.kernel.org/linux-media/20221115131822.6640-1-imv4bel@gmail.com/
Comment 1 Guilherme de Almeida Suckevicz 2022-11-25 17:40:41 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2148514]
Comment 6 Justin M. Forbes 2023-09-25 16:54:36 UTC 
This was fixed for Fedora with the 6.3.7 stable kernel updates.
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