Bug 2151956 (CVE-2022-45919) - CVE-2022-45919 kernel: use-after-free due to race condition occurring in dvb_ca_en50221.c
Summary: CVE-2022-45919 kernel: use-after-free due to race condition occurring in dvb_...
Keywords:
Status: NEW
Alias: CVE-2022-45919
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: 2151957 2153019 2153020 2153021 2153022
Blocks: 2150349
TreeView+ depends on / blocked
 
Reported: 2022-12-08 17:37 UTC by Guilherme de Almeida Suckevicz
Modified: 2023-07-07 08:29 UTC (History)
37 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 CA EN50221 interface of the DVB core device driver. It could occur in the dvb_ca_en50221_release() function if there is a disconnect after an open, because of the lack of a wait_event. 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 2022-12-08 17:37:45 UTC 
An issue was discovered in the Linux kernel through 6.0.10. In drivers/media/dvb-core/dvb_ca_en50221.c, a use-after-free can occur is there is a disconnect after an open, because of the lack of a wait_event.

Reference and upstream patch:
https://lore.kernel.org/linux-media/20221121063308.GA33821@ubuntu/T/#u
Comment 1 Guilherme de Almeida Suckevicz 2022-12-08 17:38:11 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2151957]
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