CVE-2021-42327
6.7 MEDIUMdp_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-bas...
Published: 2021-10-21 · Last updated: 2026-06-17
Severity and scoring
- CVSS
- 6.7 MEDIUM
- Vector
- CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
- CWE
- CWE-787
Affected products
| Vendor | Product |
|---|---|
| fedoraproject | fedora, h300e_firmware, h300s_firmware |
| linux | fedora, h300e_firmware, h300s_firmware |
| netapp | fedora, h300e_firmware, h300s_firmware |
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.
Source: NVD
References
- [NVD]https://nvd.nist.gov/vuln/detail/CVE-2021-42327
- [Other]https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f23750b5b3d98653b31d4469592935ef6364ad67
- [Vendor advisory]https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/log/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c
- [Other]https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RDDEW4APTYKJK365HC2JZIVXYUV7ZRN7/
- [Other]https://security.netapp.com/advisory/ntap-20211118-0005/
- [Other]https://www.mail-archive.com/amd-gfx%40lists.freedesktop.org/msg69080.html
- [Other]https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/?id=f23750b5b3d98653b31d4469592935ef6364ad67
- [Vendor advisory]https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/log/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_debugfs.c
- [Other]https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RDDEW4APTYKJK365HC2JZIVXYUV7ZRN7/
- [Other]https://security.netapp.com/advisory/ntap-20211118-0005/
- [Other]https://www.mail-archive.com/amd-gfx%40lists.freedesktop.org/msg69080.html
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