CVE-2021-47348
drm/amd/display: Avoid HDCP over-read and corruption
- Published
- Updated
- Reserved
- Assigned by
- Linux
Description
In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Avoid HDCP over-read and corruption Instead of reading the desired 5 bytes of the actual target field, the code was reading 8. This could result in a corrupted value if the trailing 3 bytes were non-zero, so instead use an appropriately sized and zero-initialized bounce buffer, and read only 5 bytes before casting to u64.
Timeline
ID reserved
By Linux
Published
- 24 months later
· 24 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADPADP (enrichment) | 3.1 | Critical9.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H |
| NVDNVD · Analyzed | 3.1 | Critical9.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.99% · top 37% of all CVEs (7 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: yes · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Critical 9.1.
Weakness
Affected products
- affected 4c283fdac08abf3211533f70623c90a34f41d08d – < c5b518f4b98dbb2bc31b6a55e6aaa1e0e2948f2e
- affected 4c283fdac08abf3211533f70623c90a34f41d08d – < 44c7c901cb368a9f2493748f213b247b5872639f
- affected 4c283fdac08abf3211533f70623c90a34f41d08d – < 3b2b93a485fb7a970bc8b5daef16f4cf579d172f
- affected 4c283fdac08abf3211533f70623c90a34f41d08d – < 06888d571b513cbfc0b41949948def6cb81021b2
- affected 5.5
- unaffected < 5.5
- unaffected 5.10.51 – ≤ 5.10.*
- unaffected 5.12.18 – ≤ 5.12.*
- unaffected 5.13.3 – ≤ 5.13.*
- unaffected 5.14 – ≤ *
References (4)
- https://git.kernel.org/stable/c/c5b518f4b98dbb2bc31b6a55e6aaa1e0e2948f2e (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/44c7c901cb368a9f2493748f213b247b5872639f (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/3b2b93a485fb7a970bc8b5daef16f4cf579d172f (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/06888d571b513cbfc0b41949948def6cb81021b2 (opens in a new tab)x_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://trackcve.app/cve/CVE-2021-47348)Record last updated .