CVE-2025-68313 (GCVE-0-2025-68313)

Vulnerability from cvelistv5 – Published: 2025-12-16 15:39 – Updated: 2026-10-15 22:02
VLAI
Title
x86/CPU/AMD: Add RDSEED fix for Zen5
Summary
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. ]
Severity
7.1 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-15 22:00 UTC
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7033 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 3e4147f33f8b647775357bae0248b9a2aeebfcd2 , < e980de2ff109dacb6d9d3a77f01b27c467115ecb (git)
Affected: 3e4147f33f8b647775357bae0248b9a2aeebfcd2 , < 36ff93e66d0efc46e39fab536a9feec968daa766 (git)
Affected: 3e4147f33f8b647775357bae0248b9a2aeebfcd2 , < 607b9fb2ce248cc5b633c5949e0153838992c152 (git)
Affected: 5953e7a89966fc5a42124a08ba33a9c57ba5173c (git)
Affected: 6.6.156 , < 6.7 (semver)
guessed Create a notification for this product.
Linux Linux Affected: 6.8
Unaffected: 0 , < 6.8 (semver)
Unaffected: 6.12.58 , ≤ 6.12.* (semver)
Unaffected: 6.17.8 , ≤ 6.17.* (semver)
Unaffected: 6.18 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
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