CVE-2025-68313

Published: Dec 16, 2025

Modified: May 11, 2026

PUBLISHED

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. ]

Vendor	Product	Versions
Linux	Linux	affected `3e4147f33f8b647775357bae0248b9a2aeebfcd2 - < e980de2ff109dacb6d9d3a77f01b27c467115ecb` affected `3e4147f33f8b647775357bae0248b9a2aeebfcd2 - < 36ff93e66d0efc46e39fab536a9feec968daa766` affected `3e4147f33f8b647775357bae0248b9a2aeebfcd2 - < 607b9fb2ce248cc5b633c5949e0153838992c152`
Linux	Linux	affected `6.8` unaffected `0 - < 6.8` unaffected `6.12.58 - <= 6.12.` unaffected `6.17.8 - <= 6.17.` unaffected `6.18 - <= *`

References

https://git.kernel.org/stable/c/e980de2ff109dacb6d9d3a77f01b27c467115ecb

https://git.kernel.org/stable/c/36ff93e66d0efc46e39fab536a9feec968daa766

https://git.kernel.org/stable/c/607b9fb2ce248cc5b633c5949e0153838992c152

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CVE-2025-68313

Description

Affected Products

References