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Vulnerability · Published Jun 21, 2024 · Assigned by Linux

CVE-2024-38633serial: max3100: Update uart_driver_registered on driver removal

Medium 5.5

In plain English

A medium-severity security flaw in Linux from Linux. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 16% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)5.5Medium
Exploit odds (30 days)0.2%top 84.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12linux6.1.94-1DEBIAN-CVE-2024-38633
Debian:13linux6.9.7-1DEBIAN-CVE-2024-38633
Debian:14linux6.9.7-1DEBIAN-CVE-2024-38633
Ubuntu:22.04:LTSlinux5.15.0-121.131UBUNTU-CVE-2024-38633
Ubuntu:24.04:LTSlinux6.8.0-44.44UBUNTU-CVE-2024-38633
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2024-38633
Ubuntu:22.04:LTSlinux-aws5.15.0-1069.75UBUNTU-CVE-2024-38633
Ubuntu:24.04:LTSlinux-aws6.8.0-1015.16UBUNTU-CVE-2024-38633
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2024-38633
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2024-38633
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2024-38633
Ubuntu:22.04:LTSlinux-aws-6.86.8.0-1015.16~22.04.1UBUNTU-CVE-2024-38633
Ubuntu:22.04:LTSlinux-azure5.15.0-1072.81UBUNTU-CVE-2024-38633
Ubuntu:24.04:LTSlinux-azure6.8.0-1014.16UBUNTU-CVE-2024-38633
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2024-38633
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2024-38633
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2024-38633
Ubuntu:22.04:LTSlinux-azure-6.86.8.0-1014.16~22.04.1UBUNTU-CVE-2024-38633
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1072.81.1UBUNTU-CVE-2024-38633
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2024-38633
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2024-38633
Ubuntu:22.04:LTSlinux-gcp5.15.0-1068.76UBUNTU-CVE-2024-38633
Ubuntu:24.04:LTSlinux-gcp6.8.0-1014.16UBUNTU-CVE-2024-38633
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2024-38633
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2024-38633
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2024-38633
Ubuntu:22.04:LTSlinux-gcp-6.86.8.0-1014.16~22.04.1UBUNTU-CVE-2024-38633
Ubuntu:22.04:LTSlinux-gke5.15.0-1066.72UBUNTU-CVE-2024-38633
Ubuntu:24.04:LTSlinux-gke6.8.0-1010.13UBUNTU-CVE-2024-38633
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1052.59UBUNTU-CVE-2024-38633
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2024-38633
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2024-38633
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2024-38633
Ubuntu:22.04:LTSlinux-hwe-6.86.8.0-45.45~22.04.1UBUNTU-CVE-2024-38633
Ubuntu:22.04:LTSlinux-ibm5.15.0-1062.65UBUNTU-CVE-2024-38633
Ubuntu:24.04:LTSlinux-ibm6.8.0-1012.12UBUNTU-CVE-2024-38633
Ubuntu:22.04:LTSlinux-ibm-6.86.8.0-1012.12~22.04.1UBUNTU-CVE-2024-38633
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1064.70UBUNTU-CVE-2024-38633
Ubuntu:22.04:LTSlinux-kvm5.15.0-1066.71UBUNTU-CVE-2024-38633
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-121.131UBUNTU-CVE-2024-38633
Ubuntu:24.04:LTSlinux-lowlatency6.8.0-44.44.1UBUNTU-CVE-2024-38633
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2024-38633
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2024-38633
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2024-38633
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.86.8.0-44.44.1~22.04.1UBUNTU-CVE-2024-38633
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1064.65UBUNTU-CVE-2024-38633
Ubuntu:24.04:LTSlinux-nvidia6.8.0-1013.14UBUNTU-CVE-2024-38633
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2024-38633
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2024-38633
Ubuntu:22.04:LTSlinux-nvidia-6.86.8.0-1013.14~22.04.1UBUNTU-CVE-2024-38633
Ubuntu:24.04:LTSlinux-nvidia-lowlatency6.8.0-1013.14.1UBUNTU-CVE-2024-38633
Ubuntu:22.04:LTSlinux-nvidia-tegra5.15.0-1028.28UBUNTU-CVE-2024-38633
Ubuntu:22.04:LTSlinux-nvidia-tegra-igx5.15.0-1016.16UBUNTU-CVE-2024-38633
Ubuntu:22.04:LTSlinux-oem-5.17no fix listedUBUNTU-CVE-2024-38633
Ubuntu:22.04:LTSlinux-oem-6.0no fix listedUBUNTU-CVE-2024-38633
Ubuntu:22.04:LTSlinux-oem-6.1no fix listedUBUNTU-CVE-2024-38633
Ubuntu:22.04:LTSlinux-oem-6.5no fix listedUBUNTU-CVE-2024-38633
Ubuntu:24.04:LTSlinux-oem-6.86.8.0-1012.12UBUNTU-CVE-2024-38633
Ubuntu:22.04:LTSlinux-oracle5.15.0-1067.73UBUNTU-CVE-2024-38633
Ubuntu:24.04:LTSlinux-oracle6.8.0-1012.12UBUNTU-CVE-2024-38633
Ubuntu:22.04:LTSlinux-oracle-6.5no fix listedUBUNTU-CVE-2024-38633
Ubuntu:22.04:LTSlinux-oracle-6.86.8.0-1012.12~22.04.1UBUNTU-CVE-2024-38633
Ubuntu:22.04:LTSlinux-raspi5.15.0-1062.65UBUNTU-CVE-2024-38633
Ubuntu:24.04:LTSlinux-raspi6.8.0-1011.12UBUNTU-CVE-2024-38633
Ubuntu:22.04:LTSlinux-realtimeno fix listedUBUNTU-CVE-2024-38633
Ubuntu:22.04:LTSlinux-riscvno fix listedUBUNTU-CVE-2024-38633
Ubuntu:24.04:LTSlinux-riscv6.8.0-44.44.1UBUNTU-CVE-2024-38633
Ubuntu:22.04:LTSlinux-riscv-5.19no fix listedUBUNTU-CVE-2024-38633
Ubuntu:22.04:LTSlinux-riscv-6.5no fix listedUBUNTU-CVE-2024-38633
Ubuntu:22.04:LTSlinux-riscv-6.86.8.0-44.44.1~22.04.1UBUNTU-CVE-2024-38633
Ubuntu:22.04:LTSlinux-starfive-5.19no fix listedUBUNTU-CVE-2024-38633
Ubuntu:22.04:LTSlinux-starfive-6.2no fix listedUBUNTU-CVE-2024-38633
Ubuntu:22.04:LTSlinux-starfive-6.5no fix listedUBUNTU-CVE-2024-38633
Ubuntu:22.04:LTSlinux-xilinx-zynqmp5.15.0-1035.39UBUNTU-CVE-2024-38633

Affected products (as reported)

VendorProductVersions
Linux Linux 7831d56b0a3544cbb6f82f76c34ca95e24d5b676 – before 21a61a7fbcfdd3493cede43ebc7c4dfae2147a8b7831d56b0a3544cbb6f82f76c34ca95e24d5b676 – before 9db4222ed8cd3e50b81c8b910ae74c26427a40037831d56b0a3544cbb6f82f76c34ca95e24d5b676 – before e8e2a4339decad7e59425b594a98613402652d727831d56b0a3544cbb6f82f76c34ca95e24d5b676 – before 361a92c9038e8c8c3996f8eeaa14522a8ad907527831d56b0a3544cbb6f82f76c34ca95e24d5b676 – before b6eb7aff23e05f362e8c9b560f6ac5e727b70e007831d56b0a3544cbb6f82f76c34ca95e24d5b676 – before e8a10089eddba40d4b2080c9d3fc2d2b2488f7627831d56b0a3544cbb6f82f76c34ca95e24d5b676 – before fa84ca78b048dfb00df0ef446f5c35e0a98ca6a07831d56b0a3544cbb6f82f76c34ca95e24d5b676 – before 712a1fcb38dc7cac6da63ee79a88708fbf9c45ec
Linux Linux 2.6.30

References