CVE-2021-42327
high
CVSS v3
—
CVSS v2
—
VIR risk
8.0
Description
dp_link_settings_write in drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c in the Linux kernel through 5.14.14 allows a heap-based buffer overflow by an attacker who can write a string to the AMD GPU display drivers debug filesystem. There are no checks on size within parse_write_buffer_into_params when it uses the size of copy_from_user to copy a userspace buffer into a 40-byte heap buffer.
Predictions
Exploit likelihood
20%
Patch ETA
—
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2021-42327
Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2021-42327.html
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| arch | fixed | 5.14.16.hardened1-1 | |
| sles | affected | | |
| debian | bookworm | fixed | 5.14.16-1 |
| debian | bullseye | fixed | 5.10.84-1 |
| debian | forky | fixed | 5.14.16-1 |
| debian | sid | fixed | 5.14.16-1 |
| debian | trixie | fixed | 5.14.16-1 |
References
Verify integrity in audit chain (admin only). AS-IS.