Observable discrepancy in Intel Processors
Priority LOW 29CWE-203Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-203.
Summary
Observable response discrepancy in some Intel(R) Processors may allow an authorized user to potentially enable information disclosure via local access.
Why it matters now
EPSS 0.00357 29th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | Intel(R) Processors | See references | — | No fix listed | CNA |
- Intel(R) Processors Vendor— Affected See references Fixed in — No fix listed CNA
CPE configurations NVD · 13
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* | 10.0 | Vulnerable | Debian |
| cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* | 33 | Vulnerable | Fedoraproject |
| cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* | 34 | Vulnerable | Fedoraproject |
| cpe:2.3:o:intel:pentium_processors_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Intel |
| cpe:2.3:h:intel:pentium_processors:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Intel |
| cpe:2.3:o:intel:celeron_processors_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Intel |
| cpe:2.3:h:intel:celeron_processors:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Intel |
| cpe:2.3:o:intel:xeon_processors_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Intel |
| cpe:2.3:h:intel:xeon_processors:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Intel |
| cpe:2.3:o:intel:core_processors_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Intel |
- cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:* Versions 10.0 Vulnerable ·Debian
- cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:* Versions 33 Vulnerable ·Fedoraproject
- cpe:2.3:o:fedoraproject:fedora:34:*:*:*:*:*:*:* Versions 34 Vulnerable ·Fedoraproject
- cpe:2.3:o:intel:pentium_processors_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Intel
- cpe:2.3:h:intel:pentium_processors:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Intel
- cpe:2.3:o:intel:celeron_processors_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Intel
- cpe:2.3:h:intel:celeron_processors:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Intel
- cpe:2.3:o:intel:xeon_processors_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Intel
- cpe:2.3:h:intel:xeon_processors:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Intel
- cpe:2.3:o:intel:core_processors_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Intel
Show 3 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:h:intel:core_processors:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Intel |
| cpe:2.3:o:intel:itanium_processors_firmware:-:*:*:*:*:*:*:* | not specified by NVD | Vulnerable | Intel |
| cpe:2.3:h:intel:itanium_processors:-:*:*:*:*:*:*:* | not specified by NVD | Running on | Intel |
- cpe:2.3:h:intel:core_processors:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Intel
- cpe:2.3:o:intel:itanium_processors_firmware:-:*:*:*:*:*:*:* Versions not specified by NVD Vulnerable ·Intel
- cpe:2.3:h:intel:itanium_processors:-:*:*:*:*:*:*:* Versions not specified by NVD Running on ·Intel
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Timeline
- 2026-10-02 Threatist record created from CVE-2021-0089
- 2026-10-03 Alias added: GHSA-hhg2-c4p3-h55x
References
Advisory 8
- https://www.intel.com/content/www/us/en/security-center/advisory/intel-sa-00516.html
- [oss-security] 20210610 Xen Security Advisory 375 v4 (CVE-2021-0089,CVE-2021-26313) - Speculative Code Store Bypass
- [oss-security] 20210610 Re: Xen Security Advisory 375 v3 (CVE-2021-0089,CVE-2021-26313) - Speculative Code Store Bypass
- [oss-security] 20210610 Re: Xen Security Advisory 375 v3 (CVE-2021-0089,CVE-2021-26313) - Speculative Code Store Bypass
- DSA-4931
- FEDORA-2021-41d4347447
- FEDORA-2021-993693c914
- GLSA-202107-30
Sources
- CVE-2021-0089 · CVE Program
- CVE-2021-0089 · NVD
- FIRST EPSS
- GHSA-hhg2-c4p3-h55x · GitHub Advisory Database · CC BY 4.0
- CVE-2021-0089 · Red Hat security data · CC BY 4.0
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