VULNERABILITY

Red Hat: CVE-2024-36932: kernel: thermal/debugfs: Prevent use-after-free from occurring after cdev removal (Multiple Advisories)

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Red Hat: CVE-2024-36932: kernel: thermal/debugfs: Prevent use-after-free from occurring after cdev removal (Multiple Advisories)

Severity
5
CVSS
(AV:L/AC:L/Au:M/C:P/I:N/A:C)
Published
05/30/2024
Created
12/06/2024
Added
12/05/2024
Modified
03/10/2025

Description

In the Linux kernel, the following vulnerability has been resolved: thermal/debugfs: Prevent use-after-free from occurring after cdev removal Since thermal_debug_cdev_remove() does not run under cdev->lock, it can run in parallel with thermal_debug_cdev_state_update() and it may free the struct thermal_debugfs object used by the latter after it has been checked against NULL. If that happens, thermal_debug_cdev_state_update() will access memory that has been freed already causing the kernel to crash. Address this by using cdev->lock in thermal_debug_cdev_remove() around the cdev->debugfs value check (in case the same cdev is removed at the same time in two different threads) and its reset to NULL. Cc :6.8+ <stable@vger.kernel.org> # 6.8+

Solution(s)

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

References

  • CVE-2024-36932
  • RHSA-2024:9315

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