PT-2024-11463 · Linux+4 · Linux Kernel+4
Published
2021-10-14
·
Updated
2025-05-28
·
CVE-2021-47469
CVSS v3.1
5.5
Medium
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
The issue is related to a deadlock that occurs when adding SPI controllers on SPI buses. This happens because of a global lock,
spi add lock, which is taken when adding new devices to prevent reusing a chip select that is already controlled. If the SPI device is itself a SPI controller and triggers the instantiation of further SPI devices, a deadlock is triggered as the system tries to register and instantiate those devices while holding the global lock. The deadlock can be easily triggered in the case of spi-mux.Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
Improper Locking
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Related Identifiers
Affected Products
Debian
Linuxmint
Linux Kernel
Suse
Ubuntu