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Fencer Intel
medium 5.5

CVE-2022-21136 json

Improper input validation for some Intel(R) Xeon(R) Processors may allow a privileged user to potentially enable denial of service via loca…

published 4y ago modified 4mo ago also EUVD-2022-26383

cvss
5.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 19%
public exploits
0
none known

Summary

Improper input validation for some Intel(R) Xeon(R) Processors may allow a privileged user to potentially enable denial of service via local access.

Patch / fix

  • microcode_ctl RHEL 9 4:20220809-1.el9

red hat advisories RHBA-2022:8351

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2022-21136 updated cvss 2.7

hw: cpu: denial of service in some Intel Xeon processors

  • Red Hat Enterprise Linux 6 microcode_ctl Red Hat Enterprise Linux 7 microcode_ctl Red Hat Enterprise Linux 8 microcode_ctl
    affected: workaround, no fix available
  • Red Hat Enterprise Linux BaseOS (v. 9) microcode_ctl 20220809-1.el9
    fixed: vendor fix RHBA-2022:8351

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
last yr.

Exploit prediction

0.27% chance of exploitation in the next 30 days, higher than 19% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CISA ADP 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CNA 3.1 5.5 CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 4.9 AV:L/AC:L/Au:N/C:N/I:N/A:C

Affected products

  • n/a Intel(R) Xeon(R) Processors

Classification

Weakness
  • CWE-20 Improper Input Validation

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.