CVE-2025-68313x86/CPU/AMD: Add RDSEED fix for Zen5
Updated under an hour ago ()
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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. ]
- CVSS
- 7.1 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Deferred
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 3e4147f33f8b647775357bae0248b9a2aeebfcd2 before e980de2ff109dacb6d9d3a77f01b27c467115ecb; from 3e4147f33f8b647775357bae0248b9a2aeebfcd2 before 36ff93e66d0efc46e39fab536a9feec968daa766; from 3e4147f33f8b647775357bae0248b9a2aeebfcd2 before 607b9fb2ce248cc5b633c5949e0153838992c152; 5953e7a89966fc5a42124a08ba33a9c57ba5173c; from 6.6.156 before 6.7 | CNA record |
References
- https://git.kernel.org/stable/c/e980de2ff109dacb6d9d3a77f01b27c467115ecb
- https://git.kernel.org/stable/c/36ff93e66d0efc46e39fab536a9feec968daa766
- https://git.kernel.org/stable/c/607b9fb2ce248cc5b633c5949e0153838992c152
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.