Skip to content
CVE PROGRAM SOURCE RECORDUnscored

CVE-2021-47195

spi: fix use-after-free of the add_lock mutex

Read JSON ↗CVE.org ↗
Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: spi: fix use-after-free of the add_lock mutex Commit 6098475d4cb4 ("spi: Fix deadlock when adding SPI controllers on SPI buses") introduced a per-controller mutex. But mutex_unlock() of said lock is called after the controller is already freed: spi_unregister_controller(ctlr) -> put_device(&ctlr->dev) -> spi_controller_release(dev) -> mutex_unlock(&ctrl->add_lock) Move the put_device() after the mutex_unlock().

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • aa3f3d7bef59583f2d3234173105a27ff61ef8fe to < 54c2c96eafcfd242e52e932ab54ace4784efe1ddaffected
  • c8dce228db6f81dbc897a018dfc5c418e917cf64 to < 11eab327a2a8bd36c38afbff920ae1bd45588dd4affected
  • 6098475d4cb48d821bdf453c61118c56e26294f0 to < 37330f37f6666c7739a44b2b6b95b047ccdbed2daffected
  • 6098475d4cb48d821bdf453c61118c56e26294f0 to < 6c53b45c71b4920b5e62f0ea8079a1da382b9434affected
  • 722ef19a161ce3fffb3d1b01ce2301c306639bddaffected
  • 5.14.15 to < 5.15affected

Linux Linux

Default version status: affected

  • 5.15affected
  • 0 to < 5.15unaffected
  • 5.15.5 to ≤ 5.15.*unaffected
  • 5.16 to ≤ *unaffected

References