# CVE-2021-47348: linux: In the Linux kernel, the following vulnerability has been resolved:  drm/amd/display: Avoid HDCP over-read and corrup...

CVE-2021-47348 is fixed in linux on 1 platform, first by DEBIAN-CVE-2021-47348, released May 21, 2024. It is not reported as exploited. Patch Radar priority: Urgent.

- Web page: https://patchblox.com/security/cve/CVE-2021-47348
- Priority: Urgent
- CVSS: 9.1 (critical)
- EPSS: 0.0099
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 21, 2024

## 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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 5.14.6-1 | [DEBIAN-CVE-2021-47348](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47348.md) | May 21, 2024 |
| Linux | linux Debian 13.5 (trixie) | 5.14.6-1 | [DEBIAN-CVE-2021-47348](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47348.md) | May 21, 2024 |
| Linux | linux Debian 14 | 5.14.6-1 | [DEBIAN-CVE-2021-47348](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47348.md) | May 21, 2024 |

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Data as of 2026-11-08T06:59:42Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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