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Red Hat: CVE-2023-31084: kernel: blocking operation in dvb_frontend_get_event and wait_event_interruptible (Multiple Advisories)

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Red Hat: CVE-2023-31084: kernel: blocking operation in dvb_frontend_get_event and wait_event_interruptible (Multiple Advisories)

Severity
4
CVSS
(AV:L/AC:M/Au:N/C:P/I:P/A:P)
Published
04/24/2023
Created
11/16/2023
Added
11/15/2023
Modified
03/20/2024

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.

Solution(s)

  • redhat-upgrade-kernel
  • redhat-upgrade-kernel-rt

References

  • DSA-5448
  • DSA-5480
  • CVE-2023-31084
  • RHSA-2023:6901
  • RHSA-2023:7077
  • RHSA-2024:0930
  • RHSA-2024:1404
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