CVE-2021-47195
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2021-47195
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-47195.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2021-47195
- Related
- Published
- 2024-04-10T19:15:47Z
- Modified
- 2024-11-17T15:15:17Z
- Severity
-
- 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- [none]
- Details
-
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:
spiunregistercontroller(ctlr) -> putdevice(&ctlr->dev) -> spicontrollerrelease(dev) -> mutexunlock(&ctrl->add_lock)
Move the putdevice() after the mutexunlock().
- References
-
- https://git.kernel.org/stable/c/37330f37f6666c7739a44b2b6b95b047ccdbed2d
- https://git.kernel.org/stable/c/6c53b45c71b4920b5e62f0ea8079a1da382b9434
- https://git.kernel.org/stable/c/11eab327a2a8bd36c38afbff920ae1bd45588dd4
- https://git.kernel.org/stable/c/54c2c96eafcfd242e52e932ab54ace4784efe1dd
- https://security-tracker.debian.org/tracker/CVE-2021-47195
Affected packages
Debian:12 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source
Debian:13 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source