CVE-2021-47046drm/amd/display: Fix off by one in hdmi_14_process_transaction()
- 7.8HighCVSS base score
- 0.24%Exploitation in 30 daysEPSS · top 84% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Fix off by one in hdmi_14_process_transaction() The hdcp_i2c_offsets[] array did not have an entry for HDCP_MESSAGE_ID_WRITE_CONTENT_STREAM_TYPE so it led to an off by one read overflow. I added an entry and copied the 0x0 value for the offset from similar code in drivers/gpu/drm/amd/display/modules/hdcp/hdcp_ddc.c. I also declared several of these arrays as having HDCP_MESSAGE_ID_MAX entries. This doesn't change the code, but it's just a belt and suspenders approach to try future proof the code.
Timeline
ID reserved
By Linux
- 1 day later
· 1 day later
Published
- 2 years later
· 2 years 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 |
|---|---|---|---|
| NVDNVD · Analyzed | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.24% · top 84% of all CVEs (13 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected 4c283fdac08abf3211533f70623c90a34f41d08d – < 403c4528e5887af3deb9838cb77a557631d1e138
- affected 4c283fdac08abf3211533f70623c90a34f41d08d – < 6a58310d5d1e5b02d0fc9b393ba540c9367bced5
- affected 4c283fdac08abf3211533f70623c90a34f41d08d – < 080bd41d6478a64edf96704fddcda52b1fd5fed7
- affected 4c283fdac08abf3211533f70623c90a34f41d08d – < 8e6fafd5a22e7a2eb216f5510db7aab54cc545c1
- affected 5.5
- unaffected < 5.5
- unaffected 5.10.37 – ≤ 5.10.*
- unaffected 5.11.21 – ≤ 5.11.*
- unaffected 5.12.4 – ≤ 5.12.*
- unaffected 5.13 – ≤ *
References
References4
- https://git.kernel.org/stable/c/403c4528e5887af3deb9838cb77a557631d1e138 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/6a58310d5d1e5b02d0fc9b393ba540c9367bced5 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/080bd41d6478a64edf96704fddcda52b1fd5fed7 (opens in a new tab)x_transferred
- https://git.kernel.org/stable/c/8e6fafd5a22e7a2eb216f5510db7aab54cc545c1 (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)
- EUVD EUVD-2021-33694 (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://cveledger.app/cve/CVE-2021-47046)Record last updated .