CVE-2021-47195 (GCVE-0-2021-47195)

Vulnerability from cvelistv5 – Published: 2024-04-10 18:56 – Updated: 2026-05-23 15:19
VLAI?
Title
spi: fix use-after-free of the add_lock mutex
Summary
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().
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: aa3f3d7bef59583f2d3234173105a27ff61ef8fe , < 54c2c96eafcfd242e52e932ab54ace4784efe1dd (git)
Affected: c8dce228db6f81dbc897a018dfc5c418e917cf64 , < 11eab327a2a8bd36c38afbff920ae1bd45588dd4 (git)
Affected: 6098475d4cb48d821bdf453c61118c56e26294f0 , < 37330f37f6666c7739a44b2b6b95b047ccdbed2d (git)
Affected: 6098475d4cb48d821bdf453c61118c56e26294f0 , < 6c53b45c71b4920b5e62f0ea8079a1da382b9434 (git)
Affected: 722ef19a161ce3fffb3d1b01ce2301c306639bdd (git)
Affected: 5.14.15 , < 5.15 (semver)
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    Linux Linux Affected: 5.15
Unaffected: 0 , < 5.15 (semver)
Unaffected: 5.15.5 , ≤ 5.15.* (semver)
Unaffected: 5.16 , ≤ * (original_commit_for_fix)
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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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