CVSS3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
AI Score
Confidence
High
EPSS
Percentile
9.0%
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().
git.kernel.org/linus/6c53b45c71b4920b5e62f0ea8079a1da382b9434 (5.16-rc2)
git.kernel.org/stable/c/37330f37f6666c7739a44b2b6b95b047ccdbed2d
git.kernel.org/stable/c/6c53b45c71b4920b5e62f0ea8079a1da382b9434
launchpad.net/bugs/cve/CVE-2021-47195
nvd.nist.gov/vuln/detail/CVE-2021-47195
security-tracker.debian.org/tracker/CVE-2021-47195
www.cve.org/CVERecord?id=CVE-2021-47195