CVE-2021-47533
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2021-47533
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2021-47533.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2021-47533
- Related
- Published
- 2024-05-24T15:15:16Z
- Modified
- 2024-09-11T02:00:07Z
- Summary
- [none]
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
drm/vc4: kms: Clear the HVS FIFO commit pointer once done
Commit 9ec03d7f1ed3 ("drm/vc4: kms: Wait on previous FIFO users before a commit") introduced a wait on the previous commit done on a given HVS FIFO.
However, we never cleared that pointer once done. Since drmcrtccommitput can free the drmcrtc_commit structure directly if we were the last user, this means that it can lead to a use-after free if we were to duplicate the state, and that stale pointer would even be copied to the new state.
Set the pointer to NULL once we're done with the wait so that we don't carry over a pointer to a free'd structure.
- 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