5.5

CVE-2024-38633

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

serial: max3100: Update uart_driver_registered on driver removal

The removal of the last MAX3100 device triggers the removal of
the driver. However, code doesn't update the respective global
variable and after insmod — rmmod — insmod cycle the kernel
oopses:

  max3100 spi-PRP0001:01: max3100_probe: adding port 0
  BUG: kernel NULL pointer dereference, address: 0000000000000408
  ...
  RIP: 0010:serial_core_register_port+0xa0/0x840
  ...
   max3100_probe+0x1b6/0x280 [max3100]
   spi_probe+0x8d/0xb0

Update the actual state so next time UART driver will be registered
again.

Hugo also noticed, that the error path in the probe also affected
by having the variable set, and not cleared. Instead of clearing it
move the assignment after the successfull uart_register_driver() call.
Data is provided by the National Vulnerability Database (NVD)
Linux ≫ Linux Kernel Version >= 2.6.30 < 4.19.316
Linux ≫ Linux Kernel Version >= 4.20 < 5.4.278
Linux ≫ Linux Kernel Version >= 5.5 < 5.10.219
Linux ≫ Linux Kernel Version >= 5.11 < 5.15.161
Linux ≫ Linux Kernel Version >= 5.16 < 6.1.93
Linux ≫ Linux Kernel Version >= 6.2 < 6.6.33
Linux ≫ Linux Kernel Version >= 6.7 < 6.9.4
Zu dieser CVE wurde keine CISA KEV oder CERT.AT-Warnung gefunden.
EPSS Metriken
Type Source Score Percentile
EPSS FIRST.org 0.02% 0.032
CVSS Metriken
Source 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-476 NULL Pointer Dereference

The product dereferences a pointer that it expects to be valid but is NULL.