CVE-2020-27820
kernel: use-after-free in nouveau kernel module
Severity
LowRed Hat Product Security
CVSS 3.1
Review impact separately from score.
Published · November 3, 2020
Updated · June 28, 2026
Description
A vulnerability was found in Linux kernel, where a use-after-frees in nouveau's postclose() handler could happen if removing device (that is not common to remove video card physically without power-off, but same happens if "unbind" the driver).
Statement
This flaw is rated as having a Low impact because the issue can only be triggered by an privileged local user (or user with physical access) as the issue only happens during unbinding the driver or removing the device.
CVSS score applicability
The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Mitigation
To mitigate this issue, prevent the module nouveau from being loaded. Please see https://access.redhat.com/solutions/41278 for information on how to blacklist a kernel module to prevent it from loading automatically.
CVSS / CWE
CVSS 3.1 · 4.1CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H
CWE-416 · Use After Free