CVE-2021-47534
In the Linux kernel, the following vulnerability has been resolved: drm/vc4: kms: Add missing drm_crtc_commit_put Commit 9ec03d7f1ed3 ("drm/vc4: kms: Wait on previous FIFO users before a commit") introduced a global state for the HVS, with each FIFO…
Does this matter?
Lower severity and a low EPSS score (0.18%). Track it; it rarely justifies an emergency change on its own.
Description
In the Linux kernel, the following vulnerability has been resolved: drm/vc4: kms: Add missing drm_crtc_commit_put Commit 9ec03d7f1ed3 ("drm/vc4: kms: Wait on previous FIFO users before a commit") introduced a global state for the HVS, with each FIFO storing the current CRTC commit so that we can properly synchronize commits. However, the refcounting was off and we thus ended up leaking the drm_crtc_commit structure every commit. Add a drm_crtc_commit_put to prevent the leakage.
- CVSS 3.1
- 4.1 MEDIUMCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.18% probability · 8th percentile
- CISA KEV
- Not listed
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/049cfff8d53a30cae3349ff71a4c01b7d9981bc2Patch
- https://git.kernel.org/stable/c/53f9601e908d42481addd67cdb01a9288c611124Patch
- https://git.kernel.org/stable/c/049cfff8d53a30cae3349ff71a4c01b7d9981bc2Patch
- https://git.kernel.org/stable/c/53f9601e908d42481addd67cdb01a9288c611124Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.