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Red Hat: CVE-2023-38409: kernel: fbcon: out-of-sync arrays in fbcon_mode_deleted due to wrong con2fb_map assignment (Multiple Advisories)

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Red Hat: CVE-2023-38409: kernel: fbcon: out-of-sync arrays in fbcon_mode_deleted due to wrong con2fb_map assignment (Multiple Advisories)

Severity
5
CVSS
(AV:L/AC:L/Au:S/C:N/I:N/A:C)
Published
07/17/2023
Created
11/30/2023
Added
11/29/2023
Modified
01/28/2025

Description

An issue was discovered in set_con2fb_map in drivers/video/fbdev/core/fbcon.c in the Linux kernel before 6.2.12. Because an assignment occurs only for the first vc, the fbcon_registered_fb and fbcon_display arrays can be desynchronized in fbcon_mode_deleted (the con2fb_map points at the old fb_info).

Solution(s)

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

References

  • CVE-2023-38409
  • RHSA-2023:7539
  • RHSA-2024:0412
  • RHSA-2024:0439
  • RHSA-2024:0448
  • RHSA-2024:0461
  • RHSA-2024:1249
  • RHSA-2024:1250
  • RHSA-2024:1306
  • RHSA-2024:1332
  • RHSA-2024:2950
  • RHSA-2024:3138
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