CVE-2025-68313
Severity CVSS v4.0:
Pending analysis
Type:
Unavailable / Other
Publication date:
16/12/2025
Last modified:
16/12/2025
Description
In the Linux kernel, the following vulnerability has been resolved:<br />
<br />
x86/CPU/AMD: Add RDSEED fix for Zen5<br />
<br />
There&#39;s an issue with RDSEED&#39;s 16-bit and 32-bit register output<br />
variants on Zen5 which return a random value of 0 "at a rate inconsistent<br />
with randomness while incorrectly signaling success (CF=1)". Search the<br />
web for AMD-SB-7055 for more detail.<br />
<br />
Add a fix glue which checks microcode revisions.<br />
<br />
[ bp: Add microcode revisions checking, rewrite. ]