---
cve: "CVE-2021-47063"
severity: "LOW"
cvss: 3.1
epss: "26%"
vendor: "Linux"
kev: false
exploited: false
published: "2024-02-29 23:15:07"
tags: [cve, security, low]
source: tsecurity.de CVE-Dossier
exported: "2026-09-10T21:48:44+02:00"
---

# CVE-2021-47063

> 3.1 LOW

## Beschreibung

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

## Referenzen

- <https://git.kernel.org/stable/c/ce450934a00cf896e648fde08d0bd1426653d7a2>
- <https://git.kernel.org/stable/c/18149b420c9bd93c443e8d1f48a063d71d9f6aa1>
- <https://git.kernel.org/stable/c/98d7d76a74e48ec3ddf2e23950adff7edcab9327>
- <https://git.kernel.org/stable/c/4d906839d321c2efbf3fed4bc31ffd9ff55b75c0>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2021-47063) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_