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Oracle Linux: CVE-2023-31084: ELSA-2023-12688: Unbreakable Enterprise kernel security update (IMPORTANT) (Multiple Advisories)

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Oracle Linux: CVE-2023-31084: ELSA-2023-12688: Unbreakable Enterprise kernel security update (IMPORTANT) (Multiple Advisories)

Severity
5
CVSS
(AV:L/AC:L/Au:S/C:N/I:N/A:C)
Published
04/17/2023
Created
08/02/2023
Added
08/01/2023
Modified
11/28/2024

Description

An issue was discovered in drivers/media/dvb-core/dvb_frontend.c in the Linux kernel 6.2. There is a blocking operation when a task is in !TASK_RUNNING. In dvb_frontend_get_event, wait_event_interruptible is called; the condition is dvb_frontend_test_event(fepriv,events). In dvb_frontend_test_event, down(&fepriv->sem) is called. However, wait_event_interruptible would put the process to sleep, and down(&fepriv->sem) may block the process. A potential deadlock flaw was found in the Linux’s kernel DVB API (used by Digital TV devices) functionality. This flaw allows a local user to crash the system.

Solution(s)

  • oracle-linux-upgrade-kernel-uek

References

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