CVE-2021-47195

Source
https://nvd.nist.gov/vuln/detail/CVE-2021-47195
Import Source
https://storage.googleapis.com/osv-test-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
2024-09-11T02:00:05Z
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

Affected packages

Debian:12 / linux

Package

Name
linux
Purl
pkg:deb/debian/linux?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.15.5-1

Ecosystem specific

{
    "urgency": "not yet assigned"
}

Debian:13 / linux

Package

Name
linux
Purl
pkg:deb/debian/linux?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
5.15.5-1

Ecosystem specific

{
    "urgency": "not yet assigned"
}