CVE-2025-68313

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Source
https://cve.org/CVERecord?id=CVE-2025-68313
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-68313.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2025-68313
Downstream
Related
Published
2025-12-16T15:39:43.972Z
Modified
2026-03-12T02:19:10.322138Z
Summary
x86/CPU/AMD: Add RDSEED fix for Zen5
Details

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. ]

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/68xxx/CVE-2025-68313.json",
    "cna_assigner": "Linux"
}
References

Affected packages

Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git

Affected ranges

Type
GIT
Repo
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Events
Introduced
3e4147f33f8b647775357bae0248b9a2aeebfcd2
Fixed
e980de2ff109dacb6d9d3a77f01b27c467115ecb
Fixed
36ff93e66d0efc46e39fab536a9feec968daa766
Fixed
607b9fb2ce248cc5b633c5949e0153838992c152

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-68313.json"

Linux / Kernel

Package

Name
Kernel

Affected ranges

Type
ECOSYSTEM
Events
Introduced
6.8.0
Fixed
6.12.58
Type
ECOSYSTEM
Events
Introduced
6.13.0
Fixed
6.17.8

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-68313.json"