CVE-2021-47195
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2021
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
spi: fix use-after-free of the add_lock mutex
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().
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| aa3f3d7bef59583f2d3234173105a27ff61ef8fe | affected | git | 54c2c96eafcfd242e52e932ab54ace4784efe1dd | Unavailable | None listed |
| c8dce228db6f81dbc897a018dfc5c418e917cf64 | affected | git | 11eab327a2a8bd36c38afbff920ae1bd45588dd4 | Unavailable | None listed |
| 6098475d4cb48d821bdf453c61118c56e26294f0 | affected | git | 37330f37f6666c7739a44b2b6b95b047ccdbed2d | Unavailable | None listed |
| 6098475d4cb48d821bdf453c61118c56e26294f0 | affected | git | 6c53b45c71b4920b5e62f0ea8079a1da382b9434 | Unavailable | None listed |
| 722ef19a161ce3fffb3d1b01ce2301c306639bdd | affected | git | Unavailable | Unavailable | None listed |
| 5.14.15 | affected | semver | 5.15 | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 5.15 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 5.15 | Unavailable | None listed |
| 5.15.5 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 5.16 | unaffected | original_commit_for_fix | Unavailable | * | None listed |