CVE-2021-26313

AMD Speculative Code Store Bypass

MEDIUM
5.5
CVSS Score
Published: June 9, 2021 at 11:23 AM UTC
Updated: June 17, 2026 at 03:43 AM UTC
8 products affected across 5 vendorsDebian LinuxXenCore I9-9900k· also runs on 3 platforms

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Severity
MEDIUM5.5
Exploit prediction
EPSS 0.3%

Description

Potential speculative code store bypass in all supported CPU products, in conjunction with software vulnerabilities relating to speculative execution of overwritten instructions, may cause an incorrect speculation and could result in data leakage.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

All versions
All versions
All versions
All versions
All versions
Xen· Xenwordpress-plugin
95%
All versions
amd-ryzen-5-5600x (environment) · amd-ryzen-7-2700x (environment) · amd-ryzen-threadripper-2990wx (environment)

Runs on — not affected

The affected product only carries this flaw when running on these platforms. The platforms themselves are not vulnerable.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

CVSS

Attack Vector
LOCAL
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
NONE
Availability
NONE
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-208CWE-203

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