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CVE-2024-50187

Disclosure Date: November 08, 2024 •
CVE-2024-50187
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Description

In the Linux kernel, the following vulnerability has been resolved:

drm/vc4: Stop the active perfmon before being destroyed

Upon closing the file descriptor, the active performance monitor is not
stopped. Although all perfmons are destroyed in vc4_perfmon_close_file(),
the active performance monitor’s pointer (vc4->active_perfmon) is still
retained.

If we open a new file descriptor and submit a few jobs with performance
monitors, the driver will attempt to stop the active performance monitor
using the stale pointer in vc4->active_perfmon. However, this pointer
is no longer valid because the previous process has already terminated,
and all performance monitors associated with it have been destroyed and
freed.

To fix this, when the active performance monitor belongs to a given
process, explicitly stop it before destroying and freeing it.

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CVSS V3 Severity and Metrics
Base Score:
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Impact Score:
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Exploitability Score:
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Vector:
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Attack Vector (AV):
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Attack Complexity (AC):
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Privileges Required (PR):
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User Interaction (UI):
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Scope (S):
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Confidentiality (C):
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Integrity (I):
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Availability (A):
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General Information

Offensive Application
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Utility Class
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Ports
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OS
Unknown
Vulnerable Versions
Linux 75452da51e24
Linux not down converted
Prerequisites
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Discovered By
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PoC Author
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Metasploit Module
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Reporter
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Vendors

  • Linux

Products

  • Linux
Technical Analysis