CVE-2021-47108
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2021-47108
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-47108.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2021-47108
- Related
- Published
- 2024-03-04T19:15:18Z
- Modified
- 2024-09-18T01:00:22Z
- Summary
- [none]
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
drm/mediatek: hdmi: Perform NULL pointer check for mtkhdmiconf
In commit 41ca9caaae0b ("drm/mediatek: hdmi: Add check for CEA modes only") a check for CEA modes was added to function mtkhdmibridgemodevalid() in order to address possible issues on MT8167; moreover, with commit c91026a938c2 ("drm/mediatek: hdmi: Add optional limit on maximal HDMI mode clock") another similar check was introduced.
Unfortunately though, at the time of writing, MT8173 does not provide any mtkhdmiconf structure and this is crashing the kernel with NULL pointer upon entering mtkhdmibridgemodevalid(), which happens as soon as a HDMI cable gets plugged in.
To fix this regression, add a NULL pointer check for hdmi->conf in the said function, restoring HDMI functionality and avoiding NULL pointer kernel panics.
- References
Affected packages
Debian:12 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source
Debian:13 / linux
Package
- Name
- linux
- Purl
- pkg:deb/debian/linux?arch=source