CVE-2021-47348
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.99%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 9.1 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
- EPSS
- 0.99% probability · 60th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-119
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/06888d571b513cbfc0b41949948def6cb81021b2Patch
- https://git.kernel.org/stable/c/3b2b93a485fb7a970bc8b5daef16f4cf579d172fPatch
- https://git.kernel.org/stable/c/44c7c901cb368a9f2493748f213b247b5872639fPatch
- https://git.kernel.org/stable/c/c5b518f4b98dbb2bc31b6a55e6aaa1e0e2948f2ePatch
- https://git.kernel.org/stable/c/06888d571b513cbfc0b41949948def6cb81021b2Patch
- https://git.kernel.org/stable/c/3b2b93a485fb7a970bc8b5daef16f4cf579d172fPatch
- https://git.kernel.org/stable/c/44c7c901cb368a9f2493748f213b247b5872639fPatch
- https://git.kernel.org/stable/c/c5b518f4b98dbb2bc31b6a55e6aaa1e0e2948f2ePatch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.