CVE-2024-38634 serial: max3100: Lock port->lock when calling uart_handle_cts_change()

2024-06-2110:18:23

Linux

github.com

linux kernel

serial port

vulnerability

port locking

6.8 Medium

AI Score

Confidence

Low

0.0004 Low

EPSS

Percentile

13.1%

JSON

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

serial: max3100: Lock port->lock when calling uart_handle_cts_change()

uart_handle_cts_change() has to be called with port lock taken,
Since we run it in a separate work, the lock may not be taken at
the time of running. Make sure that it’s taken by explicitly doing
that. Without it we got a splat:

WARNING: CPU: 0 PID: 10 at drivers/tty/serial/serial_core.c:3491 uart_handle_cts_change+0xa6/0xb0
…
Workqueue: max3100-0 max3100_work [max3100]
RIP: 0010:uart_handle_cts_change+0xa6/0xb0
…
max3100_handlerx+0xc5/0x110 [max3100]
max3100_work+0x12a/0x340 [max3100]

CNA Affected

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "7831d56b0a35",
        "lessThan": "44b38924135d",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "7831d56b0a35",
        "lessThan": "ea9b35372b58",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "7831d56b0a35",
        "lessThan": "cc121e3722a0",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "7831d56b0a35",
        "lessThan": "78dbda51bb42",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "7831d56b0a35",
        "lessThan": "8296bb9e5925",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "7831d56b0a35",
        "lessThan": "93df2fba6c7d",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "7831d56b0a35",
        "lessThan": "865b30c86619",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "7831d56b0a35",
        "lessThan": "77ab53371a20",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/tty/serial/max3100.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "2.6.30"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "2.6.30",
        "versionType": "custom"
      },
      {
        "status": "unaffected",
        "version": "4.19.316",
        "versionType": "custom",
        "lessThanOrEqual": "4.19.*"
      },
      {
        "status": "unaffected",
        "version": "5.4.278",
        "versionType": "custom",
        "lessThanOrEqual": "5.4.*"
      },
      {
        "status": "unaffected",
        "version": "5.10.219",
        "versionType": "custom",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.161",
        "versionType": "custom",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.93",
        "versionType": "custom",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.33",
        "versionType": "custom",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.9.4",
        "versionType": "custom",
        "lessThanOrEqual": "6.9.*"
      },
      {
        "status": "unaffected",
        "version": "6.10-rc1",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/tty/serial/max3100.c"
    ],
    "defaultStatus": "affected"
  }
]