CVE-2025-68313
High
Description
In the Linux kernel, the following vulnerability has been resolved: x86/CPU/AMD: Add RDSEED fix for Zen5 There's an issue with RDSEED's 16-bit and 32-bit register output variants on Zen5 which return a random value of 0 "at a rate inconsistent with randomness while incorrectly signaling success (CF=1)". Search the web for AMD-SB-7055 for more detail. Add a fix glue which checks microcode revisions. [ bp: Add microcode revisions checking, rewrite. ]
SeverityHigh
CVSS7.1
Exploit probability3. percentile0.1%
Product
Linux
PublishedDec 16, 2025
First seenDec 16, 2025
How to fix
Update
- Linux Linuxe980de2ff109dacb6d9d3a77f01b27c467115ecb, 36ff93e66d0efc46e39fab536a9feec968daa766, 607b9fb2ce248cc5b633c5949e0153838992c152, 6.7 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| Linux Linux | 3e4147f33f8b647775357bae0248b9a2aeebfcd2 ≤ v < e980de2ff109dacb6d9d3a77f01b27c467115ecb, 3e4147f33f8b647775357bae0248b9a2aeebfcd2 ≤ v < 36ff93e66d0efc46e39fab536a9feec968daa766, 3e4147f33f8b647775357bae0248b9a2aeebfcd2 ≤ v < 607b9fb2ce248cc5b633c5949e0153838992c152, 5953e7a89966fc5a42124a08ba33a9c57ba5173c, 6.6.156 ≤ v < 6.7, 6.8 | e980de2ff109dacb6d9d3a77f01b27c467115ecb, 36ff93e66d0efc46e39fab536a9feec968daa766, 607b9fb2ce248cc5b633c5949e0153838992c152, 6.7 |
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