CVE-2024-38633

serial: max3100: Update uart_driver_registered on driver removal

State: Published
Severity: Not scored
Published: Jun 21, 2024
Updated: May 11, 2026
Reserved: Jun 18, 2024

Description

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	7831d56b0a3544cbb6f82f76c34ca95e24d5b676 to before 21a61a7fbcfdd3493cede43ebc7c4dfae2147a8bAffected 7831d56b0a3544cbb6f82f76c34ca95e24d5b676 to before 9db4222ed8cd3e50b81c8b910ae74c26427a4003Affected 7831d56b0a3544cbb6f82f76c34ca95e24d5b676 to before e8e2a4339decad7e59425b594a98613402652d72Affected 7831d56b0a3544cbb6f82f76c34ca95e24d5b676 to before 361a92c9038e8c8c3996f8eeaa14522a8ad90752Affected 7831d56b0a3544cbb6f82f76c34ca95e24d5b676 to before b6eb7aff23e05f362e8c9b560f6ac5e727b70e00Affected 7831d56b0a3544cbb6f82f76c34ca95e24d5b676 to before e8a10089eddba40d4b2080c9d3fc2d2b2488f762Affected 7831d56b0a3544cbb6f82f76c34ca95e24d5b676 to before fa84ca78b048dfb00df0ef446f5c35e0a98ca6a0Affected 7831d56b0a3544cbb6f82f76c34ca95e24d5b676 to before 712a1fcb38dc7cac6da63ee79a88708fbf9c45ecAffected
LinuxLinux	2.6.30Affected before 2.6.30Not affected 4.19.316 through 4.19.Not affected 5.4.278 through 5.4.Not affected 5.10.219 through 5.10.Not affected 5.15.161 through 5.15.Not affected 6.1.93 through 6.1.Not affected 6.6.33 through 6.6.Not affected 6.9.4 through 6.9.*Not affected 6.10 and laterNot affected

Product

Versions

LinuxLinux

7831d56b0a3544cbb6f82f76c34ca95e24d5b676 to before 21a61a7fbcfdd3493cede43ebc7c4dfae2147a8bAffected
7831d56b0a3544cbb6f82f76c34ca95e24d5b676 to before 9db4222ed8cd3e50b81c8b910ae74c26427a4003Affected
7831d56b0a3544cbb6f82f76c34ca95e24d5b676 to before e8e2a4339decad7e59425b594a98613402652d72Affected
7831d56b0a3544cbb6f82f76c34ca95e24d5b676 to before 361a92c9038e8c8c3996f8eeaa14522a8ad90752Affected
7831d56b0a3544cbb6f82f76c34ca95e24d5b676 to before b6eb7aff23e05f362e8c9b560f6ac5e727b70e00Affected
7831d56b0a3544cbb6f82f76c34ca95e24d5b676 to before e8a10089eddba40d4b2080c9d3fc2d2b2488f762Affected
7831d56b0a3544cbb6f82f76c34ca95e24d5b676 to before fa84ca78b048dfb00df0ef446f5c35e0a98ca6a0Affected
7831d56b0a3544cbb6f82f76c34ca95e24d5b676 to before 712a1fcb38dc7cac6da63ee79a88708fbf9c45ecAffected

LinuxLinux

2.6.30Affected
before 2.6.30Not affected
4.19.316 through 4.19.*Not affected
5.4.278 through 5.4.*Not affected
5.10.219 through 5.10.*Not affected
5.15.161 through 5.15.*Not affected
6.1.93 through 6.1.*Not affected
6.6.33 through 6.6.*Not affected
6.9.4 through 6.9.*Not affected
6.10 and laterNot affected

References

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