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Review reviewHigh

CVE-2025-68195

Linux

In the Linux kernel, the following vulnerability has been resolved: x86/CPU/AMD: Add missing terminator for zen5_rdseed_microcode Running x86_match_min_microcode_rev() on a Zen5 CPU trips up KASAN for an out of bounds access.

CVSS
7.1
EPSS
0.12%
2.55% percentile
CISA KEV
Not listed
Published
2025.12.16
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.12%
Technical severityCVSS 7.1

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: x86/CPU/AMD: Add missing terminator for zen5_rdseed_microcode Running x86_match_min_microcode_rev() on a Zen5 CPU trips up KASAN for an out of bounds access.

Affected product and versions

Product
Linux
Affected versions
>= 36ff93e66d0efc46e39fab536a9feec968daa766 < 4c6b56a76478bd1ab609827c571905386c11d308, >= 607b9fb2ce248cc5b633c5949e0153838992c152 < f1fdffe0afea02ba783acfe815b6a60e7180df40, >= e980de2ff109dacb6d9d3a77f01b27c467115ecb, >= 6.12.58 < 6.13
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
CWE
Not available