Debian Security Bug TrackerDEBIANCVE:CVE-2021-47195CVE-2021-47195
5.5 Medium
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
6.8 Medium
AI Score
Confidence
High
0.0004 Low
EPSS
Percentile
9.1%
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().
| OS | Version | Architecture | Package | Version | Filename |
|---|---|---|---|---|---|
| Debian | 12 | all | linux | < 5.15.5-1 | linux_5.15.5-1_all.deb |
| Debian | 11 | all | linux | < 5.10.209-2 | linux_5.10.209-2_all.deb |
| Debian | 10 | all | linux | < 4.19.249-2 | linux_4.19.249-2_all.deb |
| Debian | 999 | all | linux | < 5.15.5-1 | linux_5.15.5-1_all.deb |
| Debian | 13 | all | linux | < 5.15.5-1 | linux_5.15.5-1_all.deb |
Related
5.5 Medium
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
6.8 Medium
AI Score
Confidence
High
0.0004 Low
EPSS
Percentile
9.1%