cbcvebase.
CVE-2024-38633
published 2024-06-21

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…

PriorityP421medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.24%
15.8th percentile
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.

Affected

26 ranges· showing 25
VendorProductVersion rangeFixed in
debianlinux< linux 6.1.94-1 (bookworm)linux 6.1.94-1 (bookworm)
linuxlinux
linuxlinux>= 7831d56b0a3544cbb6f82f76c34ca95e24d5b676 < 21a61a7fbcfdd3493cede43ebc7c4dfae2147a8b21a61a7fbcfdd3493cede43ebc7c4dfae2147a8b
linuxlinux>= 7831d56b0a3544cbb6f82f76c34ca95e24d5b676 < 9db4222ed8cd3e50b81c8b910ae74c26427a40039db4222ed8cd3e50b81c8b910ae74c26427a4003
linuxlinux>= 7831d56b0a3544cbb6f82f76c34ca95e24d5b676 < e8e2a4339decad7e59425b594a98613402652d72e8e2a4339decad7e59425b594a98613402652d72
linuxlinux>= 7831d56b0a3544cbb6f82f76c34ca95e24d5b676 < 361a92c9038e8c8c3996f8eeaa14522a8ad90752361a92c9038e8c8c3996f8eeaa14522a8ad90752
linuxlinux>= 7831d56b0a3544cbb6f82f76c34ca95e24d5b676 < b6eb7aff23e05f362e8c9b560f6ac5e727b70e00b6eb7aff23e05f362e8c9b560f6ac5e727b70e00
linuxlinux>= 7831d56b0a3544cbb6f82f76c34ca95e24d5b676 < e8a10089eddba40d4b2080c9d3fc2d2b2488f762e8a10089eddba40d4b2080c9d3fc2d2b2488f762
linuxlinux>= 7831d56b0a3544cbb6f82f76c34ca95e24d5b676 < fa84ca78b048dfb00df0ef446f5c35e0a98ca6a0fa84ca78b048dfb00df0ef446f5c35e0a98ca6a0
linuxlinux>= 7831d56b0a3544cbb6f82f76c34ca95e24d5b676 < 712a1fcb38dc7cac6da63ee79a88708fbf9c45ec712a1fcb38dc7cac6da63ee79a88708fbf9c45ec
linuxlinux_kernel>= 0 < 5.10.221-15.10.221-1
linuxlinux_kernel>= 0 < 6.1.94-16.1.94-1
linuxlinux_kernel>= 0 < 6.9.7-16.9.7-1
linuxlinux_kernel>= 0 < 6.9.7-16.9.7-1
linuxlinux_kernel>= 0 < 5.4.0-192.2125.4.0-192.212
linuxlinux_kernel>= 0 < 5.15.0-121.1315.15.0-121.131
linuxlinux_kernel>= 0 < 6.8.0-44.446.8.0-44.44
linuxlinux_kernel>= 0 < 4.4.0-262.2964.4.0-262.296
linuxlinux_kernel>= 0 < 4.15.0-232.2444.15.0-232.244
linuxlinux_kernel>= 2.6.30 < 4.19.3164.19.316
linuxlinux_kernel>= 4.20 < 5.4.2785.4.278
linuxlinux_kernel>= 5.11 < 5.15.1615.15.161
linuxlinux_kernel>= 5.16 < 6.1.936.1.93
linuxlinux_kernel>= 5.5 < 5.10.2195.10.219
linuxlinux_kernel>= 6.2 < 6.6.336.6.33

CVSS provenance

nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv8.8HIGH
vendor_ubuntu8.8HIGH
vendor_debian5.5MEDIUM
vendor_redhat5.5MEDIUM
Stop checking back — get the weekly exploitation signal.

Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.