CVE-2023-52749

2024-05-2116:15:14

416baaa9-dc9f-4396-8d5f-8c081fb06d67

web.nvd.nist.gov

linux kernel

spi module

null dereference

vulnerability

system suspend

race condition

synchronous transfer

6.7 Medium

AI Score

Confidence

Low

0.0004 Low

EPSS

Percentile

15.6%

JSON

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

spi: Fix null dereference on suspend

A race condition exists where a synchronous (noqueue) transfer can be
active during a system suspend. This can cause a null pointer
dereference exception to occur when the system resumes.

Example order of events leading to the exception:

spi_sync() calls __spi_transfer_message_noqueue() which sets
ctlr->cur_msg
Spi transfer begins via spi_transfer_one_message()
System is suspended interrupting the transfer context
System is resumed
spi_controller_resume() calls spi_start_queue() which resets cur_msg
to NULL
Spi transfer context resumes and spi_finalize_current_message() is
called which dereferences cur_msg (which is now NULL)

Wait for synchronous transfers to complete before suspending by
acquiring the bus mutex and setting/checking a suspend flag.

Affected configurations

Vulners

Node

linuxlinux_kernelRange6.1.0–6.1.66

linuxlinux_kernelRange6.2.0–6.6.3

linuxlinux_kernelRange6.7.0≥

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/spi/spi.c",
      "include/linux/spi/spi.h"
    ],
    "versions": [
      {
        "version": "1da177e4c3f4",
        "lessThan": "4ec4508db975",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1da177e4c3f4",
        "lessThan": "96474ea47dc6",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "1da177e4c3f4",
        "lessThan": "bef4a48f4ef7",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/spi/spi.c",
      "include/linux/spi/spi.h"
    ],
    "versions": [
      {
        "version": "6.1.66",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.6.3",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.7",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]