5.5

CVE-2024-26866

spi: lpspi: Avoid potential use-after-free in probe()

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

spi: lpspi: Avoid potential use-after-free in probe()

fsl_lpspi_probe() is allocating/disposing memory manually with
spi_alloc_host()/spi_alloc_target(), but uses
devm_spi_register_controller(). In case of error after the latter call the
memory will be explicitly freed in the probe function by
spi_controller_put() call, but used afterwards by "devm" management outside
probe() (spi_unregister_controller() <- devm_spi_unregister() below).

Unable to handle kernel NULL pointer dereference at virtual address 0000000000000070
...
Call trace:
 kernfs_find_ns
 kernfs_find_and_get_ns
 sysfs_remove_group
 sysfs_remove_groups
 device_remove_attrs
 device_del
 spi_unregister_controller
 devm_spi_unregister
 release_nodes
 devres_release_all
 really_probe
 driver_probe_device
 __device_attach_driver
 bus_for_each_drv
 __device_attach
 device_initial_probe
 bus_probe_device
 deferred_probe_work_func
 process_one_work
 worker_thread
 kthread
 ret_from_fork
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 4.10 < 6.6.23
Linux ≫ Linux Kernel Version >= 6.7 < 6.7.11
Linux ≫ Linux Kernel Version >= 6.8 < 6.8.2
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.22% 0.118
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
nvd@nist.gov 5.5 1.8 3.6
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-416 Use After Free

The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

https://git.kernel.org/stable/c/1543418e82789cc383cd36d41469983c64e3fc7f
Patch
https://git.kernel.org/stable/c/2ae0ab0143fcc06190713ed81a6486ed0ad3c861
Patch
https://git.kernel.org/stable/c/996ce839606afd0fef91355627868022aa73eb68
Patch
https://git.kernel.org/stable/c/da83ed350e4604b976e94239b08d8e2e7eaee7ea
Patch