Kernel stack overwrite via malformed device name
Published Mar 22, 2021 · Updated Aug 3, 2024
Buffer overflow in the Linux kernel RPA PCI Hotplug driver through 5.11.8 allows local users to overwrite kernel stack data via sysfs writes. The add_slot_store and remove_slot_store handlers mishandle drc_name null termination when accepting device names, copying beyond the intended buffer into the kernel stack. Access requires root or CAP_SYS_ADMIN permission to write the driver sysfs settings; successful exploitation can crash the kernel or potentially execute code.
Summary
What happened
Buffer overflow in the Linux kernel RPA PCI Hotplug driver through 5.11.8 allows local users to overwrite kernel stack data via sysfs writes. The add_slot_store and remove_slot_store handlers mishandle drc_name null termination when accepting device names, copying beyond the intended buffer into the kernel stack. Access requires root or CAP_SYS_ADMIN permission to write the driver sysfs settings; successful exploitation can crash the kernel or potentially execute code.
The record
- CVE
- CVE-2021-28972
- Published
- Mar 22, 2021
- Updated
- Aug 3, 2024
- Vendor
- Unknown vendor
- Product
- Unknown product
- Classifications
- CWE-120, T1068
- Attack vector
- local
- Privileges
- admin
Timeline
How it unfolded
- Mar 22, 2021CVE publishedPublication date reported by the CVE source.
- Aug 3, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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What is affected?
Affected products and versions are unavailable in this record.
Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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