vulnerability

Ubuntu: (Multiple Advisories) (CVE-2021-47063): Linux kernel vulnerabilities

Severity
7
CVSS
(AV:L/AC:L/Au:S/C:C/I:C/A:C)
Published
02/29/2024
Added
07/04/2024
Modified
01/30/2025

Description

In the Linux kernel, the following vulnerability has been resolved:

drm: bridge/panel: Cleanup connector on bridge detach

If we don't call drm_connector_cleanup() manually in
panel_bridge_detach(), the connector will be cleaned up with the other
DRM objects in the call to drm_mode_config_cleanup(). However, since our
drm_connector is devm-allocated, by the time drm_mode_config_cleanup()
will be called, our connector will be long gone. Therefore, the
connector must be cleaned up when the bridge is detached to avoid
use-after-free conditions.

v2: Cleanup connector only if it was created

v3: Add FIXME

v4: (Use connector->dev) directly in if() block

Solution(s)

ubuntu-upgrade-linux-image-4-15-0-1132-oracleubuntu-upgrade-linux-image-4-15-0-1153-kvmubuntu-upgrade-linux-image-4-15-0-1163-gcpubuntu-upgrade-linux-image-4-15-0-1169-awsubuntu-upgrade-linux-image-4-15-0-1178-azureubuntu-upgrade-linux-image-4-15-0-226-genericubuntu-upgrade-linux-image-4-15-0-226-lowlatencyubuntu-upgrade-linux-image-5-4-0-1038-iotubuntu-upgrade-linux-image-5-4-0-1045-xilinx-zynqmpubuntu-upgrade-linux-image-5-4-0-1073-ibmubuntu-upgrade-linux-image-5-4-0-1086-bluefieldubuntu-upgrade-linux-image-5-4-0-1093-gkeopubuntu-upgrade-linux-image-5-4-0-1110-raspiubuntu-upgrade-linux-image-5-4-0-1114-kvmubuntu-upgrade-linux-image-5-4-0-1125-oracleubuntu-upgrade-linux-image-5-4-0-1126-awsubuntu-upgrade-linux-image-5-4-0-1130-gcpubuntu-upgrade-linux-image-5-4-0-1131-azureubuntu-upgrade-linux-image-5-4-0-186-genericubuntu-upgrade-linux-image-5-4-0-186-generic-lpaeubuntu-upgrade-linux-image-5-4-0-186-lowlatencyubuntu-upgrade-linux-image-awsubuntu-upgrade-linux-image-aws-hweubuntu-upgrade-linux-image-aws-lts-18-04ubuntu-upgrade-linux-image-aws-lts-20-04ubuntu-upgrade-linux-image-azureubuntu-upgrade-linux-image-azure-lts-18-04ubuntu-upgrade-linux-image-azure-lts-20-04ubuntu-upgrade-linux-image-bluefieldubuntu-upgrade-linux-image-gcpubuntu-upgrade-linux-image-gcp-lts-18-04ubuntu-upgrade-linux-image-gcp-lts-20-04ubuntu-upgrade-linux-image-genericubuntu-upgrade-linux-image-generic-hwe-16-04ubuntu-upgrade-linux-image-generic-hwe-18-04ubuntu-upgrade-linux-image-generic-lpaeubuntu-upgrade-linux-image-gkeubuntu-upgrade-linux-image-gkeopubuntu-upgrade-linux-image-gkeop-5-4ubuntu-upgrade-linux-image-ibmubuntu-upgrade-linux-image-ibm-lts-20-04ubuntu-upgrade-linux-image-kvmubuntu-upgrade-linux-image-lowlatencyubuntu-upgrade-linux-image-lowlatency-hwe-16-04ubuntu-upgrade-linux-image-lowlatency-hwe-18-04ubuntu-upgrade-linux-image-oemubuntu-upgrade-linux-image-oem-osp1ubuntu-upgrade-linux-image-oracleubuntu-upgrade-linux-image-oracle-lts-18-04ubuntu-upgrade-linux-image-oracle-lts-20-04ubuntu-upgrade-linux-image-raspiubuntu-upgrade-linux-image-raspi-hwe-18-04ubuntu-upgrade-linux-image-raspi2ubuntu-upgrade-linux-image-snapdragon-hwe-18-04ubuntu-upgrade-linux-image-virtualubuntu-upgrade-linux-image-virtual-hwe-16-04ubuntu-upgrade-linux-image-virtual-hwe-18-04ubuntu-upgrade-linux-image-xilinx-zynqmp
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