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Fencer Intel
medium 5.5

CVE-2021-0127 json

Insufficient control flow management in some Intel(R) Processors may allow an authenticated user to potentially enable a denial of service…

published 4y ago modified 4mo ago also EUVD-2021-2746

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 22%
public exploits
0
none known

Summary

Insufficient control flow management in some Intel(R) Processors may allow an authenticated user to potentially enable a denial of service via local access.

Patch / fix

  • intel-microcode Debian 14, Debian 13, Debian 12 3.20220207.1

debian advisories DEBIAN-CVE-2021-0127

  • intel-microcode Ubuntu 18.04 LTS 3.20220510.0ubuntu0.18.04.1
  • intel-microcode Ubuntu 20.04 LTS 3.20220510.0ubuntu0.20.04.1
  • intel-microcode Ubuntu 22.04 LTS 3.20220510.0ubuntu0.22.04.1
  • intel-microcode Ubuntu Pro 16.04 LTS 3.20220510.0ubuntu0.16.04.1+esm1

ubuntu advisories UBUNTU-CVE-2021-0127

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • ucode-intel SLES for SAP 12 SP5, SLES 12 SP5 20220207-3.38.1
  • ucode-intel SLES for SAP 12 SP4, SLES for SAP 12 SP3, SLES 12 SP4-LTSS +8 more 20220207-13.93.1
  • ucode-intel SLES for SAP 15 SP2, SLES 15 SP2-LTSS, SLES 15 SP2-BCL +10 more 20220207-10.1
  • ucode-intel SLES for SAP 15 SP1, SLES 15 SP1-LTSS, SLES 15 SP1-BCL +3 more 20220207-3.206.1
  • ucode-intel SLES for SAP 15, SLE High Performance Computing 15-LTSS, SLE High Performance Computing 15-ESPOS 20220207-3.70.1

suse advisories SUSE-SU-2022:0576-1SUSE-SU-2022:0575-1SUSE-SU-2022:0574-1SUSE-SU-2022:0541-1SUSE-SU-2022:0502-1

  • ucode-intel openSUSE Tumbleweed 20220207-1.1
  • ucode-intel openSUSE Leap 15.3 20220207-10.1

opensuse advisories openSUSE-SU-2024:11840-1openSUSE-SU-2022:0574-1

  • intel-ucode Alpine 3.24, Alpine 3.23, Alpine 3.22 +10 more 20220207-r0

alpine advisories ALPINE-CVE-2021-0127

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Is CVE-2021-0127 in your stack? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

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-2021-0127 updated cvss 5.6

microcode: Intel Processor Breakpoint Control Flow

  • Red Hat Enterprise Linux 6 microcode_ctl Red Hat Enterprise Linux 7 microcode_ctl Red Hat Enterprise Linux 8 microcode_ctl
    affected: no fix available

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 ICSA-23-122-01 updated cvss 5.5

Mitsubishi Electric Factory Automation Products

  • Mitsubishi Electric MELIPC MI1002-W Mitsubishi Electric MELIPC MI2012-W Mitsubishi Electric MELIPC MI3315G-W Mitsubishi Electric MELIPC MI3321G-W Mitsubishi Electric MELIPC MI5122-VM Mitsubishi Electric MELSEC iQ-R R102WCPU-W
    +4 more products
    Mitsubishi Electric MELSEC Q Q24DHCCPU-LS Mitsubishi Electric MELSEC Q Q24DHCCPU-V Mitsubishi Electric MELSEC Q Q24DHCCPU-VG Mitsubishi Electric MELSEC Q Q26DHCCPU-LS
    affected: vendor fix intel.com

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
last yr.

Exploit prediction

0.30% chance of exploitation in the next 30 days, higher than 22% 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 2.1 AV:L/AC:L/Au:N/C:N/I:N/A:P

Affected products

  • n/a Intel(R) Processors

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.